OPERATOR'S

Construction Products, LLC MANUAL

Manual Part No. 002037
June 16, 2003

HY-RAM
HAMMERS

LIGHT & MEDIUM

SIDE-PLATE
MOUNTED MODELS
730
740
745
Allied Hy-Ram Models 730, 740 & 745

Allied Hy-Ram Light and Medium Models

730, 740, 745
Document Change Notice

Date Page Change

12-30-98 Throughout Added Model 745
12-30-98 4-1 Revised Specifications
12-30-98 4-2, 4-3 Updated Dimension Dwgs.
12-17-99 4-1 thru 4-7 Revised Specs and Dimension
Dwgs - Added Dimension Charts
8-16-00 2-2,2-3,2-4 Art
8-16-00 Chp 4 Specs & Dimensions
8-16-00 Throughout Minor changes
2-16-01 Chp 4 Specifications
2-16-01 Chp 7 Additional WARNINGS
2-16-01 Throughout Minor Editting Changes
10-16-01 Reprint
05-15-02 Chps 1, 5, 11 Updated Safety/Warranty Info
Torque info
06-16-03 Page 4-1 Updated Technical Specs
Allied Hy-Ram Models 730, 740 & 745

Table of Contents
Section Page
SECTION 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.3 Allied Product Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
SECTION 2.0 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2 Description of Assembly Groups . . . . . . . . . . . . . . . . . . . . . . . . 2-2
SECTION 3.0 THEORY OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . 3-1
SECTION 4.0 TECHNICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 4-1
4.1 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 DIMENSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
SECTION 5.0 GENERAL CONSTRUCTION SAFETY . . . . . . . . . . . . . . . . 5-1
5.1 Owner’s Responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2 General Construction Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.3 Federal, State, Local and OSHA Construction Guidelines and Regulations . 5-1
5.4 General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.4.1 CAUTIONS and WARNINGS . . . . . . . . . . . . . . . . . . . . . . 5-1
5.4.2 Initial Operating Precautions . . . . . . . . . . . . . . . . . . . . . . 5-2
5.4.3 Carrier Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.4.4 Personnel Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.4.5 Hydraulic Pressure Precautions . . . . . . . . . . . . . . . . . . . . . 5-3
5.4.6 Nitrogen Gas Precautions . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.4.7 Hoisting and Lifting Precautions . . . . . . . . . . . . . . . . . . . . 5-3
5.4.8 Maintenance Precautions . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.4.9 Site Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
SECTION 6.0 HY-RAM APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . 6-1
SECTION 7.0 HY-RAM ATTACHMENT & REMOVAL . . . . . . . . . . . . . . . 7-1
7.1 Carrier Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.2 Installation Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.3 Top Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.4 Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

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Allied Hy-Ram Models 730, 740 & 745

Table of Contents (continued)

Section Page
7.5 Tools Required to Attach Hy-Ram . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.6 Attaching the Models 730, 740 or 745 Hy-Ram to the Carrier . . . . . . . . 7-2
7.7 Connecting the Hy-Ram Hydraulic Lines . . . . . . . . . . . . . . . . . . . 7-3
7.8 Connecting the Hydraulic Line to the Two-Speed Valve . . . . . . . . . . . 7-4
7.9 Removing the Hy-Ram from the Carrier . . . . . . . . . . . . . . . . . . . . 7-4
Model 730: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Models 740 and 745: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
SECTION 8.0 DEMOLITION TOOL . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.1 Demolition Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.2 Sharpening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.3 Installing the Demolition Tool . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.3.1 Locking Pin Style - Installation . . . . . . . . . . . . . . . . . . . . . 8-1
8.3.2 Spring Pin Style - Installation . . . . . . . . . . . . . . . . . . . . . . 8-1
8.3.3 Retainer Pin/Plunger Spring Style - Installation . . . . . . . . . . . . 8-1
8.3.4 Retainer Pin/Spring Pin Style - Installation . . . . . . . . . . . . . . 8-2
8.4 Removing the Demolition Tool . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.4.1 Tools that may be required: . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.4.2 Locking Pin Style - Removal . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.4.3 Spring Pin Style - Removal . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.4.4 Retainer Pin/Plunger Spring Style - Removal . . . . . . . . . . . . . . 8-2
8.4.5 Retainer Pin/Spring Pin Style - Removal . . . . . . . . . . . . . . . . 8-3
8.5 Manually Lubricating the Demolition Tool . . . . . . . . . . . . . . . . . . 8-3
8.5.1. Allied AutoLube Automatic Lubrication System . . . . . . . . . . . . 8-3
8.5.1.1 Using the AutoLube During Underwater Operation . . . . . . . . . 8-3
SECTION 9.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.1 Operator Check List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.2 Tools Required By Operator . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.3 Operating the Hy-Ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.4 Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
9.5 Advance From Outer Edge . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
9.6 Angle Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
9.7 Hammer Rocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
9.8 Incorrect Use of the Hydraulic Hammer . . . . . . . . . . . . . . . . . . . . 9-3
9.8.1 Never Use as a Crowbar . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

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Table of Contents (continued)

Section Page
9.8.2 Never Drive Demolition Tool into the Material . . . . . . . . . . . . . 9-4
9.8.3 Never Pound with the Hammer and Demolition Tool . . . . . . . . . 9-4
9.8.4 Never Lift Or Transport Loads With The Hammer. . . . . . . . . . . 9-4
9.9 Never Use In or Under Water . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
9.10 Special Operating Features . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
9.10.1 Energy Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
9.10.2 Two-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.10.3 AutoControl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.10.4 Auto Shut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.10.5 Pressure-Reduced Mode . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.10.6 Precharge Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.11 Special Operation Environments . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.11.1 Working Underground . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
9.11.2 Working Underwater . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
9.12 Working In High Outside Temperatures . . . . . . . . . . . . . . . . . . . 9-6
9.13 Working in Low Outside Temperatures . . . . . . . . . . . . . . . . . . . 9-6
SECTION 10.0 OPERATOR TROUBLESHOOTING CHART . . . . . . . . . . . 10-1
SECTION 11.0 CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . 11-1
11.1 Care and Mainenance Shedule . . . . . . . . . . . . . . . . . . . . . . . . 11-1
11.1.1 Warranty Protection . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
11.2 Care and Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . 11-2
11.2.1 Checking Hydraulic Lines for Leaks Before Starting Work . . . . . 11-2
11.2.2 Daily Checking for Cracks . . . . . . . . . . . . . . . . . . . . . . . 11-2
11.2.3 Checking Wear to the Tool Bushings . . . . . . . . . . . . . . . . . 11-2
11.2.4 Checking Impact Face of Piston for Wear . . . . . . . . . . . . . . 11-2
11.2.5 Checking Wear to the Retainer Pin . . . . . . . . . . . . . . . . . . 11-2
11.2.6 Checking Wear to the Demolition Tool . . . . . . . . . . . . . . . . 11-3
11.2.7 Inspect Dust Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-3
11.2.9 Checking the Nitrogen Precharge Chamber. . . . . . . . . . . . . 11-6
11.2.10 Refilling the Precharge Chamber . . . . . . . . . . . . . . . . . . 11-6
11.2.11 Checking the High Pressure Accumulator . . . . . . . . . . . . . 11-7
11.2.12 Checking Mounting Pins . . . . . . . . . . . . . . . . . . . . . . 11-8
11.2.13 Checking The Side Plates . . . . . . . . . . . . . . . . . . . . . . 11-8

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Allied Hy-Ram Models 730, 740 & 745

Table of Contents (continued)

Section Page
11.2.14 Checking And Cleaning The Hydraulic Oil Filter If Equipped . . . 11-8
11.2.15 Checking And Cleaning The Hydraulic Oil Filter On The Carrier . 11-8
SECTION 12.0 LIFTING & TRANSPORT . . . . . . . . . . . . . . . . . . . . . . 12-1
SECTION 13.0 STORAGE OF THE HAMMER . . . . . . . . . . . . . . . . . . . 13-1
13.1 Storing Hy-Ram on the Carrier . . . . . . . . . . . . . . . . . . . . . . . 13-1
13.2 Short Term Hy-Ram Storage off the Carrier—14 Days or Less . . . . . . 13-1
13.3 Long Term Hy-Ram Storage off the Carrier—More than 14 Days . . . . . 13-1

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Allied Hy-Ram Models 730, 740 & 745

List of Figures
Figure Page
Figure 2-1. Typical Hy-Ram Main Components . . . . . . . . . . . . . . . . . . . . 2-1
Figure 2-2. Typical Light/Medium Hy-Ram . . . . . . . . . . . . . . . . . . . . . . 2-2
Figure 2-3. Typical High-Pressure Accumulator . . . . . . . . . . . . . . . . . . . . 2-2
Figure 2-4. Typical Cylincer Head . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Figure 2-5. Typical Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Figure 2-6. Typical Tool Holder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Figure 2-7. Typical Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Figure 3-1. Hammer Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Figure 4-1. Dimension Drawing - Model 730 . . . . . . . . . . . . . . . . . . . . . . 4-3
Figure 4-2. Dimension Drawing - Model 740 . . . . . . . . . . . . . . . . . . . . . . 4-5
Figure 4-3. Dimension Drawing - Model 745 . . . . . . . . . . . . . . . . . . . . . . 4-7
Figure 7-1. Attaching Hy-Ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Figure 7-2. Connecting Hydraulic Lines . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Figure 7-3. Ball Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Figure 8-1. Installing the Demolition Tool . . . . . . . . . . . . . . . . . . . . . . . 8-2
Figure 8-2. Lifting Demolition Tool. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Figure 8-3. Lubricating the Demolition Tool . . . . . . . . . . . . . . . . . . . . . . 8-3
Figure 9-1. Advancing From Outer Edge . . . . . . . . . . . . . . . . . . . . . . . 9-2
Figure 9-2. Angle Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Figure 9-3. Rocking The Hammer . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Figure 9-4. Never Use Hy-Ram As A Crowbar . . . . . . . . . . . . . . . . . . . . . 9-3
Figure 9-5. Never Drive Tool into Material . . . . . . . . . . . . . . . . . . . . . . 9-4
Figure 9-6. Do Not Pound With Hammer . . . . . . . . . . . . . . . . . . . . . . . 9-4
Figure 9-7. Do Not Use Hammmer As Lift Or Transport . . . . . . . . . . . . . . 9-4

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Allied Hy-Ram Models 730, 740 & 745

List of Figures (continued)

Figure Page
Figure 11-1. Checking Wear Of Tool Bushings . . . . . . . . . . . . . . . . . . . . 11-2
Figure 11-2. Check Wear To Demolition Tool. . . . . . . . . . . . . . . . . . . . . 11-3
Figure 11-3. Models 730, 740 & 745 Torque Items on Hammer . . . . . . . . . . . 11-5
Figure 11-4. Typical Hy-Ram Nitrogen Precharge Chamber. . . . . . . . . . . . . 11-6
Figure 11-5. Filling the Nitrogen Precharge Chamber . . . . . . . . . . . . . . . . 11-7
Figure 12-1. Hammer Lift Point. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

vi 06/16/03
Allied Hy-Ram Models 730, 740 & 745

SECTION 1.0
INTRODUCTION

Hy-Ram Hammers Operator’s Manual: Part Number 002037

This Operator’s Manual is applicable to Light & Medium
Side-Plate Mounted Models:
Models: 730, 740, 745
Years of Manufacture: 1985 and beyond
Serial Number(s)________________________________________

This manual contains important informa- Pay particular attention to WARNINGS

tion for the safe use and maintenance and CAUTIONS, identified with this sym-
of the Allied Hy-Ram Light & Medium bol.
Side-Plate Mounted Models: Models
730, 740, 745 ~
Read this manual thoroughly before in- These instructions are important for per-
stalling, operating or servicing the sonnel safety and full service life of the
HyRam. This manual must be easily acces- Hy-Ram. Follow them carefully.
sible to operators, service and transport
personnel. Store this manual in a conve- 1.2 Warranty Information
nient location.
Pay careful attention to all instructions Warranty coverage of the Allied Hy-Ram
and follow all governing regulations. Oper- depends on proper maintenance and opera-
ation or service other than in accordance tion of the Hy-Ram as detailed in this man-
with these instructions may subject the ual. Improper maintenance or operation
Hy-Ram to conditions beyond its design ca- shall void Hy-Ram warranty coverage. Im-
pability. Improper operation, service or the mediately upon receipt of the Hy-Ram,
use of non-Allied parts may result in read all Allied warranty documents deliv-
Hy-Ram failure or personnel injury. ered with the unit for a thorough under-
standing of warranty coverage.
1.1 Safety Information Record the Hy-Ram Serial Number in the
space provided above and in the Parts
When using the Hy-Ram, safety proce- Manual.
dures must be followed. See Section 5.0 for
further safety guidelines.

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Allied Hy-Ram Models 730, 740 & 745

1.3 Allied Product Policies

Allied reserves the right to make modifica-

tions to the design or changes to the specifi-
cations without prior notice.
In this manual, Allied recommends
Hy-Ram applications, maintenance and
service consistent with industry practices.
Allied takes no responsibility for the re-
sults of actions not recommended in this
manual and specifically the results of:
· Operation in non-recommended applica-
tions
· Incorrect operation
· Improper maintenance
· Use of service parts not approved or sup-
plied by Allied.
These exclusions apply to damage to the
Hy-Ram, associated equipment, and injury
to personnel.

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Allied Hy-Ram Models 730, 740 & 745

SECTION 2.0
OVERVIEW

High Pressure
Accumulator

Cylinder Head
Side Plate Assembly

Cylinder Body
Assembly

Side Plate

Tool Holder
Assembly

Tool

Figure 2-1. Typical Hy-Ram Main Components

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Allied Hy-Ram Models 730, 740 & 745

2.1 Introduction

The Allied Hy-Ram Model 730 is classified

as a Light Series (LTS) hammer; Models
740 and 745 are classified as Medium Se-
ries (MDS). These models are designed for
use on backhoes and excavators.
Depending on the hammer model, they are
compatible with backhoes weighing 12,000
to 25,000 lbs. (5,000 to 11,000 kg) and exca-
vators weighing 15,000 to 40,000 lbs.
(7,000 to 18,000 ). The hammers can be in-
stalled on almost any hydraulic system and
can be operated with pump capacities from
12 to 32 gpm.
The maximum operating pressure is 2000
psi (140 bar) for the Model 730, 2450 psi
(170 bar) for Model 740 and 2600 psi (180
bar) for Model 745. Hammer impact energy
is derived from nitrogen gas pressure in the
head and hydraulic pressure (see Section
3.0 Theory of Operation). Figure 2-2. Typical Light/Medium Hy-Ram

Illustrations are representative of typical

hammers. These illustrations are not to be
used for repair or service.

2.2 Description of Assembly Groups

High Pressure
Accumulator
• High-Pressure Accumulator
The high-pressure accumulator, inte-
gral to the cylinger casting, is located on
the front of the cylinder. The accumula-
tor guarantees maximum single blow
force and protects the hydraulic system
of the carrier. Refer to Section 11.2.11
Checking the High-Pressure Accumula-
tor. Refer to Figure 2-3.

Figure 2-3. Typical High-Pressure Accumulator

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Allied Hy-Ram Models 730, 740 & 745

• Cylinder Head
The cylinder head is the upper hammer
section.
The nitrogen filling and measuring fit-
ting for the precharge chamber is lo-
cated on the front of the cylinder head.
Fitting G.
G

•
Figure 2-4. Typical Cylincer Head
Cylinder
The cylinder body is the center section of
the hammer between the cylinder head
and the tool holder.
P T
The hydraulic pressure connection is lo-
745
cated on the front of the cylinder body. Cyl# HM# S/N
730, 740
Connection P.
The hydraulic return connection is lo- 0000-0
Cyl#
HM 0000*
Model
0000
S/N
cated on the front of the cylinder body. Designation

Connection T
* HM 303 = 730
HM 553 = 740
HM 583 = 745

Figure 2-5. Typical Cylinder

• Tool Holder
The tool holder holds the demolition tool
in place with spring and retainer pins.
The two tool bushings (upper and lower)
are located in the tool holder.
The cylinder head, cylinder and tool Lube
Fitting
holder assemblies are connected with
tension rods which pass through all
three components.
The lubrication fitting is located on the
front of the tool holder. Refer to Section
8.5 for lubrication instructions.

Figure 2-6. Typical Tool Holder

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Allied Hy-Ram Models 730, 740 & 745

• Piston
The piston reciprocates in the cylinder
transferring its energy to the demolition
tool upon impact. The upper end of the
piston has an identification number
which is explained in Figure 2-7.

Working
Surface (Gas)

Design
Upper Seal
Surface

Type
O-A
2000

0000
Working
Surface (Oil)

Serial No.
Working
Surface (Oil)

Lower Seal
Surface

Impact
Surface

Figure 2-7. Typical Piston

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Allied Hy-Ram Models 730, 740 & 745

SECTION 3.0
THEORY OF OPERATION

Figure 3-1 is a diagram of basic Hy-Ram op-

eration illustrating how the piston is
moved up and down to impact the demoli-
tion tool.
Nitrogen f3
Up and down piston travel within the cylin-
der is controlled by hydraulic pressure Alternating
above piston surface f2. High & Low f2
Pressure
· When the pressure above surface f2 is
Piston
low, the high pressure against surface f1 (At top of stroke)
forces the piston up the cylinder. This
movement also compresses the nitrogen
gas, increasing pressure on piston sur- Constant
High Pressure
face f3.

· The upward piston movement causes a

f1
control valve (not shown) to shift posi-
tion. This shift results in a high pressure
above surface f2. Tool

· When the pressure above surface f2 is

high, the piston is forced downward. The
nitrogen pressure against piston surface
f3 also drives the piston downward with
even greater force.

· Just before tool impact, the control valve Figure 3-1. Hammer Block Diagram
shifts again. This shift results in a low
pressure above surface f2.

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Allied Hy-Ram Models 730, 740 & 745

This page intentionally

left blank.

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Allied Hy-Ram Models 730, 740 & 745

SECTION 4.0
TECHNICAL INFORMATION

4.1 Technical Specifications

Technical Specifications

Hy-Ram Model 730 740 745

Frequency blows
Range per 400 - 1150 350 - 800 350 - 800
minute
Hydraulic Flow gpm 12 - 22 18 - 32 18 - 32
(lpm) (45 - 85) (70 -120)) (70 - 120)
Hydraulic Operating psi 1600 - 2000 1750 - 2450 1750 - 2600
Pressure (bar) (110 - 140) (120 - 170) (120 - 180)
Hydraulic Relief psi 2300 2750 2900
Pressure (bar) (159) (190) (200)
Pressure* in Nitrogen psi(bar) 154 (10.6) 141 (9.7) 168 (12)
Precharge Chamber psi(bar) 180 (12.5) 165 (11.5) 195 (13.5)
Pressure in Accumulator psi 725 725 725
(bar) (50) (50) (50)
Working Weight** lbs. 865 1600 1600
(kg) (386) (726) (726)
Working Length Dimension D on Dimension Charts and Drawings

Demolition Tool Std. Cross Cut Cross Cut Cross Cut

Diameter in. (mm) 3.15 (80) 3.94 (100) 3.94 (100)
Working Length in. (mm) 18 (457) 23 (533) 23 (533)
Carrier Weight Class 1000 lbs.
Backhoe 1000 kg 12 - 25 (5 -11 ) 16 - 25 (7 -11 ) 16 - 25 (7 -11 )
Excavator 15 - 30 (7 - 14) 20 - 40 (9 - 18) 20 - 40 (9 - 18)
Hydraulic Hose Size in. 3/4 1 1
(mm) (19) (25) (25)

*First value at 70oF (21oC), second value at 150oF (65oC).

**Includes side plates and tool.

NOTE
For decal descriptions and locations, refer
to the Parts Manual for each individual
model covered in this operator’s manual.

06/16/03 4-1
Allied Hy-Ram Models 730, 740 & 745

4.2 DIMENSIONS

The dimensions listed in Table 4-1 below are illustrated in the drawing on the next
page.Each dimension is indicated by a letter on the drawing. Table 4-1 lists these letters,
each dimension and an explanation of the dimension.

Table 4-1. Dimensions of 730 Hy-Ram

Letter Dimension Decscription

in. (mm)
A 65.8 (1670) Hammer length

B 12.3 (311) Hammer width

C 18.0 (348) Tool length

D 63.3 (1608) Hammer working length - stick pin to tool tip.

E 10.3 (260) Mounting width

F 19.0 (483) Hammer depth

G 10.6 (268) Stick pin to link pin length

H 3.15 (80) Tool diameter

4-2 06/16/03
Allied Hy-Ram Models 730, 740 & 745

F
3.44 G E

B
o/ H
C

Figure 4-1. Dimension Drawing - Model 730

06/16/03 4-3
Allied Hy-Ram Models 730, 740 & 745

The dimensions listed in Table 4-2 below are illustrated in the drawing on the next
page.Each dimension is indicated by a letter on the drawing. Table 4-2 lists these letters,
each dimension and an explanation of the dimension.

Table 4-2. Dimensions of 740 Hy-Ram

Letter Dimension Decscription

in. (mm)
A 79.3 (2013) Hammer length

B 15.8 (400) Hammer width

C 21.0 (546) Tool length

D 76.8(1951) Hammer working length - stick pin to tool tip.

E 11.0 (279) Mounting width

F 21.5 (546) Hammer depth

G 14.0 (356) Stick pin to link pin length

H 3.94 (100) Tool diameter

4-4 06/16/03
Allied Hy-Ram Models 730, 740 & 745

F
E
4.00 G

C
o/ H

Figure 4-2. Dimension Drawing - Model 740

06/16/03 4-5
Allied Hy-Ram Models 730, 740 & 745

The dimensions listed in Table 4-3 below are illustrated in the drawing on the next
page.Each dimension is indicated by a letter on the drawing. Table 4-3 lists these letters,
each dimension and an explanation of the dimension.

Table 4-3. Dimensions of 745 Hy-Ram

Letter Dimension Decscription

in. (mm)
A 79.3 (2013) Hammer length

B 15.8 (400) Hammer width

C 21.0 (546) Tool length

D 76.8(1951) Hammer working length - stick pin to tool tip.

E 11.0 (279) Mounting width

F 21.5 (546) Hammer depth

G 14.0 (356) Stick pin to link pin length

H 3.94 (100) Tool diameter

4-6 06/16/03
Allied Hy-Ram Models 730, 740 & 745

F
E
4.00 G

B
C
o/ H

Figure 4-3. Dimension Drawing - Model 745

06/16/03 4-7
Allied Hy-Ram Models 730, 740 & 745

SECTION 5.0
GENERAL CONSTRUCTION SAFETY

5.1 Owner’s Responsibilities Superintendent of Documents

P.O. Bo 371954
The equipment owner shall: Pittsburgh, PA 15250
· Provide this technical manual to the Ask for Construction Industry OSHA
Hy-Ram operators. Standards 29 CFR 1926/1910.
· Train all operating personnel and en-
force the procedures explained in this
5.4 General Safety Summary
manual, especially regarding safety to
personnel and equipment.
The safe and effective use of any heavy con-
· Adapt these general instructions to spe-
struction equipment depends upon proper
cific applications.
installation, operation, maintenance and
repair. Operational safety must encompass
5.2 General Construction Safety all of these factors. This section includes
minimum safety policies the Hy-Ram
Follow standard safety precautions ex- owner shall establish for all Hy-Ram in-
pected and required of those working in stallations. The operational safety pro-
construction, including but not limited to: gram must be tailored by the Hy-Ram
locating existing underground service and owner to the specific site and application.
utility lines, establishing pedestrian barri- Such a program will result in increased
ers and using personnel protection equip- equipment life and performance and re-
ment, etc. duced downtime. Most importantly, it will
reduce the risk of equipment damage and
5.3 Federal, State, Local and OSHA Con- personnel injuries.
struction Guidelines and Regulations
5.4.1 CAUTIONS and WARNINGS
Use the Hy-Ram in accordance with all fed-
eral, state and local regulations regarding Throughout this manual detailed CAU-
construction practices and public safety. TIONS and WARNINGS are included with
Identification of, and compliance to, gov- instructions and procedures. Even experi-
erning regulations are the responsibility of enced service technicians are to review
the owner and operator. these CAUTIONS and WARNINGS prior
In the United States, comply with the rec- to performing a procedure. CAUTIONS
ommendations of the Occupational Safety and WARNINGS are highlighted by the
and Health Administration standards of symbol shown here and explained as fol-
the U.S. Department of Labor. For OSHA lows:
construction guidelines contact your local
federal government office or write:
U.S. Government Printing Office
~

5-1 06/16/03
Allied Hy-Ram Models 730, 740 & 745

the Hy-Ram requirements listed in the

~ ~WARNING~ Technical Specifications Table, Section
4.1.
Instructions preceeded by this sym- · To protect the operator from hot, high
bol identify hazards to personnel. pressure hydraulic fluid, do not run any
WARNING instructions must be fol- hydraulic lines through the operator’s
lowed to ensure safe handling and cab.
operation. These instructions shall · Follow the carrier manufacturer’s guide-
be followed at all times. Improper lines regarding filtration of return fluid
operation or servicing can result in from the Hy-Ram. The carrier oil filter
personal injury. Read this manual must be cleaned according to the Care
thoroughly before operating or and Maintenance Schedule.
maintaining the Ho-Pac. · To protect the operator from injury from
flying rock splinters, the operator’s cab
must have a protective shield. The shield
must be closed during hammer opera-
tion.
· Refer to the carrier manufacturer’s man-
~ ~CAUTION~ uals for proper carrier operation, service
and maintenance procedures.
Instructions identified with this · Never lift or move loads with the
symbol are important to prevent Hy-Ram.
damage to equipoment and to · Operate the Hy-Ram only from the car-
maintain full service life of the rier operator’s seat; and only after the
Ho-Pac. Follow them carefully. Op- carrier and Hy-Ram are correctly posi-
eration or service not in accor- tioned.
dance with these instructions may
subject the Ho-Pac to conditions 5.4.4 Personnel Precautions
beyond its design capability. Read
this manual thoroughly before oper- · The carrier operator shall perform some
ating or maintaining the Ho-Pac. Hy-Ram procedures with an assistant.
Both the operator and assistant must be
experienced and thoroughly trained in
5.4.2 Initial Operating Precautions these procedures.
· Always wear safety glasses and protec-
Some pre-operational checks and sched- tive clothing when operating or handling
uled maintenance must be performed more the Hy-Ram.
frequently on a new Hy-Ram installation. · All personnel in the immediate area, in-
Refer to the Operator Checklist and the cluding the carrier operator and the as-
sistant, must wear ear protection.
Care and Maintenance Schedule in Section
· Avoid pinch points.
11.0 of this manual.
· Never put fingers in mounting bores or
locking bars.
5.4.3 Carrier Precautions · Keep personnel away from the demoli-
tion tool while:
· To assure stable carrier operation, the · The demolition tool is jammed in the
carrier load capacity must meet or exceed tool holder; it may release suddenly.

06/16/03 5-2
Allied Hy-Ram Models 730, 740 & 745

· Technicians service the hydraulic sys- 5.4.8 Maintenance Precautions

tem.
· Technicians service the nitrogen · Do not start maintenance on the
precharge chamber. Hy-Ram until it has cooled. The Hy-Ram
· Technicians service the accumulator is heated during operation and some
nitrogen chamber. components become very hot.

5.4.5 Hydraulic Pressure

Precautions

· Before disconnecting any hydraulic

~ WARNING
Bodily injury and equipment damage
lines, properly bleed all hydraulic system could result if the Hy-Ram falls. Af-
pressure. ter detaching it from the carrier,
· Make sure the Hy-Ram and carrier hy- block the Hy-Ram securely.
draulic systems are compatible, espe-
cially regarding:
· Flow rate and pressure
· Pressure relief valve setting
· Hydraulic fluid compatibility
· Heat exchanger if required

~ WARNING
Clearing a jammed demolition tool
5.4.6 Nitrogen Gas Precautions is hazardous. Properly protect per-
sonnel against sudden release.
· To avoid an explosion and equipment
damage, use only 99.8% pure nitrogen
gas in the precharge chamber and the ac-
cumulator pressure chamber.
· Do not allow anyone into the service area · Jamming the demolition tool in the
while the service technicians are testing, holder can damage internal hammer
measuring, filling or bleeding the nitro- components and shorten Hy-Ram ser-
gen chambers. vice life. To reduce the risk of jamming,
carefully follow the operator checklist
and the care and maintenance schedule,
5.4.7 Hoisting and Lifting Precautions especially:
· Lubricating the demolition tool.
· The Hy-Ram and component weights are (See Section 8-5.)
listed in the Technical Specifications ta- · Checking tool bushing wear.
ble, Section 4.1. Before starting a proce- (See Section 11.2.3.)
dure that requires hoisting, prepare the · Checking piston impact surface wear
required lifting equipment. (See Section 11.2.4.)
· When hoisting the assembled Hy-Ram, · Checking demolition tool wear.
use the designated lifting eyes. (See Section 11.2.6.)
· Keep hands clear of any bores or fittings
when moving, removing, attaching, or
hoisting the Hy-Ram.

5-3 06/16/03
Allied Hy-Ram Models 730, 740 & 745

5.4.9 Site Precautions

· The danger area around the carrier is

greater for hammer operation than for
carrier operation due to the risk of flying
rock splinters and debris. Immediately
cease operation of the Hy-Ram if person-
nel without protective glasses or protec-
tive clothing enter the danger area.
· Never use the Hy-Ram Models 730, 740
or 745 in or under water. These models
are not designed and built for underwa-
ter use.
· When work site temperatures are below mi-
nus 4oF [-20oC], follow the carrier manufac-
turer’s low temperature operating
instructions. Refer to Section 9.13 Working
in Low Outside Temperatures.

06/16/03 5-4
Allied Hy-Ram Models 730, 740 & 745

SECTION 6.0
HY-RAM APPLICATIONS

The Hy-Ram Models 730, 740 and 745 are Clearance Work: Concrete structures,
suited for many types of construction ap- building foundations, bridge decks, pave-
plications. The following examples are typ- ment.
ical and suggest the variety of standard
Trenching: Trench rock and quarry over-
applications such as post-driving,
size.
sheet-driving, frost-cutting, etc. The small
models covered in this manual are used for Safety regulations for the Hy-Ram and the
lighter duty applications than larger ham- carrier must be observed at all times.
mers. Please note that the Models 730, 740
and 745 cannot be used in or under water
without modification. Typical surface ap-
plications are:

6-1 06/16/03
Allied Hy-Ram Models 730, 740 & 745

SECTION 7.0
HY-RAM ATTACHMENT & REMOVAL

7.1 Carrier Requirements Allied Installation Kits are designed for

most carrier makes and models and con-
Refer to Section 4.1 Technical Specifica- tain the parts required for the mechanical
tions to determine the carrier weight re- and hydraulic hookup.
quired to adequately maneuver and handle
the Hy-Ram. 7.3 Top Mounting Brackets

Top mounting brackets are not used with

~ WARNING the models covered in this manual.
Do not attempt to set the Hy-Ram
operating pressure or flow without
first consulting the installation in- 7.4 Heat Exchanger
structions for your machine.
Maximum operating pressures are In some working environments with a high
listed in Section 4-1 Technical ambient temperature, a heat exchanger
Specifications. Do not exceed this may be necessary to maintain a safe oper-
value. ating oil temperature. The oil temperature
shall never exceed 176o F. [80oC.]. There
are several operating problems that could
The hydraulic pressure and flow must be cause oil to overheat. DO NOT install a
adequate for operation of both the carrier heat exchanger before inspecting and cor-
and the hammer simultaneously. Hydrau- recting Hy-Ram or carrier malfunctions.
lic pressure and flow requirements for the Refer to Section 10.0 Troubleshooting and
Hy-Ram model being used are given in Sec- also carrier troubleshooting.
tion 4.1 Technical Specifications.
The carrier must have an oil temperature 7.5 Tools Required to Attach
gauge. Operating temperature range of the Hy-Ram
hydraulic oil is 140o F.(60oC.) to 176o F.
[80oC.]. If the ambient temperature is low, No special tools are required, but the fol-
warm the oil to a minimum of 32o F. (0o C.) lowing tools are recommended:
by running the carrier (see paragraph 9.13 · safety glasses & gloves
for operating at low temperature). · sledge hammer
· drift pin
7.2 Installation Kits · 3/4-inch drive socket wrench
· 3/4-inch sockets
Proper mounting hardware must be used · grease gun
to mount the Hy-Ram to the carrier. Allied · open end wrenches
installation kits are recommended; if oth- · caliper for checking tool wear
ers are used, they must satisfy the mini- · pry bar
mum requirements listed under Section
7.6 Attaching the Hy-Ram.

06/16/03 7-1
Allied Hy-Ram Models 730, 740 & 745

7.6 Attaching the Models 730, 740 or 745

Hy-Ram to the Carrier ~ WARNING
Keep hands away from bores and
(Refer to Figure 7-1.) pin areas when attaching the
Hy-Ram. Do not touch any parts
when the boom is moving. Never
~ WARNING put fingers in bores to check align-
ment; use drift pin.
The Hy-Ram shall only be attached
to a carrier with sufficient load car-
rying capacity. If the carrier is too
light, it may become unstable.
~ WARNING
Always wear safety glasses during
attachment, operation, and re-
~ WARNING moval of the Hy-Ram.
When an assistant is required to at-
tach and remove the carrier attach-
ments, all directions and signals NOTE
must be agreed upon before begin- The installation desribed below is
ning attachment or removal. typical; installation procedures may
vary. Consult carrier attachment in-
stallation instructions for specific de-
tails.
1. Before attaching the Hy-Ram, remove
the bucket or other tool attached to the
stick of the carrier.

Stick INSTALLATION
Stick
KIT BULLETIN
Link
Link
Bushing
Spacer
Sleeve
Bushing

Mounting Pin Mounting Pin

Allied's Allied's
Attachment Attachment
Note: Flange Bushing Can Also Go Into Bracket

Figure 7-1. Attaching Hy-Ram

7-2 06/16/03
Allied Hy-Ram Models 730, 740 & 745

2. Slide the stick into the hammer at the

front (hose side) and align mounting P
holes. The front (hose side) of the ham-
mer should face the operator in the car-
T
rier cab.

3. Push the stick pin into holes through the

hammer, spacer, if required, and the
stick. Tap stick pin through holes with a
hammer if necessary. Note that a spacer
may go between the stick and hammer
on both sides.
4. Install stick pin bolts and nuts.
Figure 7-2. Connecting Hydraulic Lines
5. Start the backhoe and maneuver the
stick until the link lines up with the
holes on the back (non-hose side) of the connections P and T (see Figure 7-2).
hammer.
2. Clean dirt from connection areas.
6. Install the spacers and link pin through
3. Put the cap nuts in the tool box for safe-
the link and hammer.
keeping. The pressure connection is
7. Install nuts and bolts in link pin. marked P.
8. Connect the hoses to the quick discon- 4. Remove the plugs from the ends of the
nects on the stick. hydraulic lines that connect to the
Hy-Ram.

~ CAUTION
Contaminated hydraulic oil is harm-
ful to attachments and carriers.
~ WARNING
Do not run any hydraulic lines
Clean connection areas and hose through the operator’s cab, since
ends before and after removing they may leak or burst. The
protective caps so hose fittings are hydraulic oil becomes very hot
clean when attached to hammer during operation.
and carrier.

5. Check the connections on the Hy-Ram

7.7 Connecting the Hy-Ram hoses. The connecting threads must be
Hydraulic Lines undamaged and free of sand or similar
foreign bodies.
(Refer to Figure 7-2.) 6. Connect the hydraulic lines to the
If not attached, connect the hydraulic lines Hy-Ram ports.
to the Hy-Ram as follows: 7. On the 730, remove the caps from the
1. Unscrew the cap nuts from Hy-Ram ends of the Hy-Ram hoses and connect

06/16/03 7-3
Allied Hy-Ram Models 730, 740 & 745

the pressure and return lines to the car-

rier quick disconnect coupling. On the ~ CAUTION
740 and 745, connect the pressure hose Collect any oil which leaks out and
to its ball valve on the dipperstick and dispose of it correctly.
the return line to its ball valve.
8. Open the ball valves. Refer to Figure 7-3.
Removal of the Hy-Ram is done in reverse
order of installation unless otherwise
stated. Refer to section 5.4.5 for hydraulic
pressure precautions.

Model 730:
1. Lay the Hy-Ram on the ground horizon-
tally.
2. Disconnect the high pressure from the
carrier quick discounnect coupling and
Figure 7-3. Ball Valve seal the connections with the appropri-
ate caps.
3. Remove the mounting pins using a steel
rod and a sledge hammer.
7.8 Connecting the Hydraulic Line to the
Two-Speed Valve
4. Store the Hy-Ram as instructed in Sec-
This hydraulic line is not required. The tion 13.0.
Models 730, 740 and 745 covered in this
manual do not have two-speed function. Models 740 and 745:
1. Close the ball valves on the dipper stick.
7.9 Removing the Hy-Ram from the
Carrier 2. Lay the Hy-Ram on the ground horizon-
tally.
3. Unscrew the high pressure hoses from
~ WARNING the carrier dipperstick and seal the con-
All directions and signals must be nections with the appropriate caps.
agreed upon beforehand with the
assistant. Keep hands well clear of 4. Remove the mounting pins using a steel
bores and boom pin areas when re- rod and a sledge hammer.
moving the hydraulic hammer. Do 5. Store the Hy-Ram as instructed in Sec-
not touch any parts when the boom tion 13.0.
is moving.

7-4 06/16/03
Allied Hy-Ram Models 730, 740 & 745

SECTION 8.0
DEMOLITION TOOL

8.1 Demolition Tool

~ WARNING
Only use genuine Allied demolition tools. Always wear safety glasses and
Use of other demolition tools may render gloves when installing the demoli-
the warranty invalid. tion tool and clear the area of by-
standers.
It is important that the demolition tools be
used correctly, especially longer demoli-
tion tools which are more susceptible to
damage from prying. Pay particular atten- 8.3.1 Locking Pin Style - Installation
tion to Section 9.0 Operation.
None of the hammer models covered in this
manual have the locking pin style demoli-
8.2 Sharpening tion tool holder.

Demolition tools shall only be remachined

on suitable equipment. Conical and blunt 8.3.2 Spring Pin Style - Installation
demolition tools can be remachined on a
lathe with carbide tooling. Chisels can be None of the hammer models covered in this
sharpened on a shaping or milling ma- manual have the spring pin style demoli-
chine. During remachining, the demolition tion tool holder.
tool must be cooled thoroughly with liquid
coolant. 8.3.3 Retainer Pin/Plunger Spring Style -
Never attempt to burn or weld the demoli- Installation
tion tools. The high temperatures involved
can damage demolition tools. (Refer to Figure 8-1.)
1. Clean tool holder bore and upper half of
8.3 Installing the Demolition Tool tool.
2. Liberally apply Allied Chisel Paste to
the tool shank.

~ WARNING 3. Position hammer horizontally to allow

access from below.
The demolition tool shall only be in-
stalled in the way described. 4. Using a hoist, lift the demolition tool
Failure to do so could allow the de- and insert it into bore, turning it until
molition tool to be driven out of the the slot in the tool is in line with the re-
tool holder with force possibly tainer pin hole.
causing bodily injury or physical
damage. 5. Insert retainer pin. Make sure plunger
spring locks the retainer pin in place.

06/16/03 8-1
Allied Hy-Ram Models 730, 740 & 745

Plug

Plunger Retainer Pin

Spring Retainer Pin
Demolition
Tool
Plunger

Spring Pin

Plunger Pin

Plunger Plug

Plunger Spring

Without Spring Pin With Spring Pin

Figure 8-1. Installing the Demolition Tool

8.3.4 Retainer Pin/Spring Pin Style - In- tion tool holder.

stallation

None of the hammer models covered in this 8.4.4 Retainer Pin/Plunger Spring Style -
manual have the retainer pin/spring pin Removal
style demolition tool holder.
(Refer to Figure 8-1.)
8.4 Removing the Demolition Tool 1. Position the Hy-Ram horizontally to al-
low access from below.
8.4.1 Tools that may be required:
2. Depress the plunger spring in the tool
· Hand sledge holder with a screwdriver to clear the re-
· Drift pin tainer pin.
· Large size screwdriver 3. While keeping the plunger spring de-
· 3/8-in. diameter x 8-in. long steel rod pressed, push or drive the retainer pin
out using a rod and hand sledge if neces-
8.4.2 Locking Pin Style - Removal sary, to clear the plunger spring. Re-
move the screwdriver and finish driving
None of the hammer models covered in this the retainer pin until tool slot is clear.
manual have the locking pin style demoli- 4. Using a hoist, remove the demolition
tion tool holder. tool from the Hy-Ram. Refer to Figure
8-2.
8.4.3 Spring Pin Style - Removal
5. Refer to Section 13.0 for storage instruc-
tions.
None of the hammer models covered in this
manual have the spring pin style demoli-

8-2 06/16/03
Allied Hy-Ram Models 730, 740 & 745

Lube
Fitting

Figure 8-3. Lubricating the Demolition Tool

Figure 8-2. Lifting Demolition Tool

2. Attach grease gun to lubrication fitting.

8.4.5 Retainer Pin/Spring Pin Style - Re- See Figure 8-3.
moval
3. Lubricate until grease emerges from the
None of the hammer models covered in this gap between the lower tool bushing and
manual have the retainer pin/spring pin the demolition tool.
style demolition tool holder.
8.5.1. Allied AutoLube Automatic
8.5 Manually Lubricating the Demolition Lubrication System
Tool
The Allied AutoLube Automatic Lubrica-
(Refer to Figure 8-3.) tion System is not used on the hammers
covered in this manual.
Allied Chisel Paste is recommended for lu-
brication. If Allied Chisel Paste is unavail-
able, a high quality, petroleum based, 8.5.1.1 Using the AutoLube During
lubricating grease with molybdenum Underwater Operation
disulfide can be used.
The demolition tool must be lubricated ev-
ery two hours during operation as follows:
~ WARNING
Never use a Model 730, 740 or
1. Stand the hydraulic hammer vertically 745 Hy-Ram Hammer underwater.
on the demolition tool and apply contact These models are not built for un-
pressure. This ensures that the tool is derwater use.
positioned in the maximum upward lo-
cation within the Hy-Ram tool holder.

06/16/03 8-3
Allied Hy-Ram Models 730, 740 & 745

SECTION 9.0
OPERATION

9.1 Operator Check List 9.3 Operating the Hy-Ram

Before operating the Hy-Ram, inspect the

following: ~ WARNING
The precharge chamber and high
· Check that hose and tube connections
pressure accumulator shall only be
are secure.
filled with 99.8% pure nitrogen gas.
· Check all fasteners for wear and tight-
Make sure no other gas, i.e., air or
ness.
oxygen, is allowed into the
· Check all fasteners according to the
precharge chamber; this could re-
maintenance schedule (see Section 11.0).
sult in an explosion.
· Check that demolition tool is inserted
properly.
· Be sure scheduled maintenance is per-

·
formed before operating the Hy-Ram.
Frequently check the oil temperature. ~ CAUTION
The temperature of the hydraulic oil Check the oil temperature often to
must never exceed 176oF. [80oC.]. ensure it does not exceed 176oF
· Be sure all tools that will be required for [80oC]. If higher temperatures are
functions to be performed are available. measured in the tank, refer to Sec-
· Remember to lubricate the demolition tion 10.0 Troubleshooting.
tool every two hours during operation.

9.2 Tools Required By Operator

No special tools are required, but the fol-

lowing tools and safety items are recom-
mended:
· safety glasses & gloves
· hearing protection
· sledge hammer
· drift pin
· 3/4-inch socket wrench
· 3/4-inch sockets
· grease gun
· open end wrenches
· caliper for checking tool wear

9-1 06/16/03
Allied Hy-Ram Models 730, 740 & 745

9.4 Startup hammer will begin cycling the piston and

tool up and down. The front part of the ve-
hicle may be raised a few inches (approxi-
~ WARNING mately 12 centimeters) from the ground so
that the weight of the carrier is exerted on
Close the protective shield on the
operator’s cab to prevent possible the demolition tool.
injury from flying rock splinters dur-
ing hammer operation.

All persons in the immediate area,

including the carrier operator, must
wear ear protection.

The Hy-Ram shall only be operated

from the operator’s seat and shall
not be put into operation until both
carrier and hammer are in the cor-
rect position.

3 2 1
~ WARNING
Immediately cease operating the
Hy-Ram if anyone moves into the Figure 9-1. Advancing From Outer Edge
danger area, which is greater for
hammer operation than for carrier
operation due to the risk of flying
debris. 9.5 Advance From Outer Edge

When working with a hydraulic (Refer to Figure 9-1.)

hammer, operation of the carrier Start breaking large and hard rocks near
is governed by the carrier manufac- the outer edge.
turer’s safety regulations.
Place the tool a short distance from the
edge of the material. If the rock does not
In cold weather conditions, warm the hy- break away after thirty (30) seconds (maxi-
draulic fluid by operating the Hy-Ram in mum), the advance must either be reduced
pressure-reduced mode. This is done by or breaking restarted at a different point.
turning on the operating switch with NO
contact pressure on the demolition tool. Af-
ter oil has been warmed to operating tem-
perature, turn off the hammer, position
the tool for operation, then restart the
hammer. With contact pressure on the de-
molition tool, the piston in the Hy-Ram is
driven up to its starting position and the

06/16/03 9-2
Allied Hy-Ram Models 730, 740 & 745

9.6 Angle Of Operation The hammer may be gently rocked back-

ward and forward at a maximum of 5o to al-
(Refer to Figure 9-2.) low dust to escape which would otherwise
dampen the impact power of the demoli-
tion tool. Do not rock the hammer at angles
greater than 5o or bending strain will occur
damaging the demolition tool and the
Hy-Ram.

9.8 Incorrect Use of the Hydraulic Ham-

mer

Carefully read through this section. The

following paragraphs describe functions
that damage the Hy-Ram or cause personal
injury.
Figure 9-2. Angle Of Operation

Always place the demolition tool at right

angles to the surface of the material. If not
placed at right angles, the hammer will
wear more quickly which could cause accel-
erated wear and premature parts damage.

9.7 Hammer Rocking

(Refer to Figure 9-3.)

Figure 9-4. Never Use Hy-Ram As A Crowbar

9.8.1 Never Use as a Crowbar

(Refer to Figure 9-4.)

Using the Hy-Ram as a crowbar may cause
the demolition tool to break.

Figure 9-3. Rocking The Hammer

9-3 06/16/03
Allied Hy-Ram Models 730, 740 & 745

9.8.2 Never Drive Demolition Tool into the Pounding at material with the hammer
Material could cause damage to the Hy-Ram and the
carrier.
(Refer to Figure 9-5.)

~ CAUTION
The Hy-Ram is not designed to lift
or transport loads. This practice
will damage the Hy-Ram.

9.8.4 Never Lift Or Transport Loads With

The Hammer
Figure 9-5. Never Drive Tool into Material
(Refer to Figure 9-7.)

If the advance is too large and the hammer

is not rocked to release the dust, the demo-
lition tool will be driven into the material,
causing the tip to glow red hot and become
soft. It then could become wedged in the
hole.

9.8.3 Never Pound with the Hammer and

Demolition Tool
Figure 9-7. Do Not Use Hammmer As Lift Or
(Refer to Figure 9-6.) Transport

9.9 Never Use In or Under Water

~ WARNING
Never use a Model 730, 740 or
745 Hy-Ram Hammer underwater.
These models are not built for un-
derwater use.

9.10 Special Operating Features

Figure 9-6. Do Not Pound With Hammer

06/16/03 9-4
Allied Hy-Ram Models 730, 740 & 745

9.10.1 Energy Recovery

The Energy Recovery system increases the 9.10.4 Auto Shut-Off

performance of the hammer in hard mate-
rial by utilizing piston recoil energy. Prior Automatic shut-off refers to an automatic
to fracture, hard material reflects a signifi- system of hydraulic pathways and controls
cant amount of breaking energy back to the which protects the hammer components
piston. Without the energy recovery sys- from damage when the demolition tool is
tem, this reflected energy is lost into the not in impact position. This feature elimi-
hydraulic oil within the hammer. nates blank-firing: the hammer automati-
The energy recovery valve quickly senses cally shuts down when there is no contact
the piston recoil and reduces the hydraulic pressure on the tool.
oil pressure above the piston. The lower oil
pressure allows the piston to move upward 9.10.5 Pressure-Reduced Mode
more quickly and with less resistance.
Once the recoil energy has partially lifted Pressure-reduced mode can be used to
the piston, the hydraulic oil pressure com- warm oil by cycling it through the hammer
pletes the process. without operating the demolition tool. This
The energy recovery system shortens the is done by turning on the operating switch
piston cycle time, thus increasing speed with NO contact pressure on the tool. After
and overall performance. No additional oil oil has been warmed to operating tempera-
flow is required for this increased operat- ture, the hammer is turned off, the tool is
ing speed. Since unused breaking energy is set for operation, then the hammer is re-
recovered, the efficiency of the hammer is started. Refer to section 9.4 Startup.
increased.
9.10.6 Precharge Chamber

The precharge chamber is located in the

9.10.2 Two-Speed Operation cylinder head above the piston and is filled
with nitrogen. As the piston moves to its
The Models 730, 740 and 745 Hy-Ram do upper most position, the nitrogen is com-
not have the Two-Speed Operation fea- pressed. The force arising from this com-
ture. pression is transferred to the top of the
piston and helps drive the piston down.
Both the precharge chamber and the hy-
9.10.3 AutoControl draulic system of the carrier provide the
force for the working stroke. This design
The Models 730, 740 and 745 Hy-Ram do feature makes the impact energy of the
not have the AutoControl feature. hammer largely independent of fluctua-
tions in the hydraulic system of the carrier
during operation.

9-5 06/16/03
Allied Hy-Ram Models 730, 740 & 745

9.11 Special Operation

Environments ~ CAUTION
When working in temperature con-
ditions below minus 4oF [-20oC],
9.11.1 Working Underground the hydraulic hammer shall not be
put into operation while the hydrau-
When using the Hy-Ram underground lic oil is still cold. Operating the
(tunnelling or mining applications) special hammer with cold hydraulic oil may
regulations may apply. Additional consid- cause the seals in the hammer to
erations include: break and the diaphragm in the
· use water sprays to suppress dust high-pressure accumulator to tear.
· use fire-resistant hydraulic fluids when Observe the carrier manufacturer’s
required. regulations.

Hydraulic systems using fire resistant flu-

ids require special engineering consider-
9.13 Working in Low Outside
ation when using the Hy-Ram. With some
fluids, decreased flow and/or pressure to Temperatures
the hammer may be necessary. Contact
Allied well before installation for specific When the temperature is below minus 4o F.
parameters for your particular fluid. (-20o C.), warm up the oil by running the
carrier before starting the Hy-Ram. Once
the oil has reached 32o F. (0o C.), the ham-
mer can be run in pressure-reduced mode
9.11.2 Working Underwater as described in Section 9.4 Startup, to flush
out the cold oil and warm circulating oil to
operating temperature of 140o F. (60o C.).
~ WARNING
Never use a Model 730, 740 or
745 Hy-Ram Hammer underwater. Keep oil circulating in the carrier and in
These models are not built for un- Hy-Ram pressure-reduced mode during
derwater use. breaks in work so that the oil does not get
too cold for normal operation.

9.12 Working In High Outside

Temperatures

Check the oil temperature frequently to

ensure it does not exceed 176oF [80oC]. If
higher temperatures are measured in the
tank, an oil cooler must be installed. Use
only hydraulic oils with adequate viscosity.

06/16/03 9-6
Allied Hy-Ram Models 730, 740 & 745

SECTION 10.0
OPERATOR TROUBLESHOOTING CHART

~ WARNING ~ CAUTION
Before removing the hydraulic lines, Before disassembling the Hy-Ram,
bleed off all hydraulic pres- bleed off all nitrogen pressure in
sure.When rectifying faults, observe the precharge chamber.
all safety regulations.

Problem Cause Remedy

Relief valve set too low. Reset pressure, check dynami-
cally.
Damaged relief cartridge or seals. Inspect-repair or replace.
Operating pressure is too low. Insufficient pump delivery (low flow Check pump with flow meter
means low pressure at the ham- (check dynamic pressure).
mer).
Flow control not set properly. Set flow control.
Failed hoses or blockage at crimp Replace hoses that are frayed or
on fitting. damaged.
Heat exchanger and return filters Change filter and repair or replace
Return line pressure too high. may be blocked. plugged cooler.
Return line connected to valve Hammer return must bypass valve
bank. bank.
Hoses or fittings too small for in- Always use proper hose and fitting
stallation. sizes.
No check valve in pressure line, Install check valve
accumulator discharges suddenly. Inspect check valve for
damage.
Repeated HP accumulator failure. Operating temperature too high. Correct overheating problem. See
Heat deteriorates rubber dia- Problem: Operating temperature
phragm. too high on page 10-3.
Nitrogen charge too high or too Charge to factory specs. after re-
low. building.
Operating pressure is too high. Check and adjust hydraulic oper-
ating pressure.
Return line pressure is too high. Locate and correct problem.
Blow frequency of hammer too low Return pressure too high Check return
pressure and eliminate cause
Operating pressure too high. Adjust as needed.
Operating temperature too high. Excessive leakage through ham- Repair or replace worn parts.
mer.
Ambient temperature is high. A cooler may be necessary —
check with carrier manufacturer.
Tool binding in bushing(s). Repair or replace as needed.
Check for proper lubrication.
Return line pressure is too high. Locate and correct problem.

10-1 06/16/03
Allied Hy-Ram Models 730, 740 & 745

10.0 OPERATOR TROUBLESHOOTING CHART (cont’)

Problem Cause Remedy

Pressure and return lines crossed. Reverse hoses.
Insufficient impact pressure. Force tool fully into tool holder by
pushing down with the carrier.
Hammer does not start. Nitrogen precharge is too high. Check and reset pressure if
needed.
Quick disconnects not opering. Repair or replace.
Ball valves closed. Open ball valves.
Operating pressure is too low. Check and reset pressure if
needed.
Fault in electrical circuit. Check for power at solenoid.
Insufficient flow of oil. Increase flow if possible.
Return oil pressure too high. Find and repair restriction to return
Hammer runs slow. flow.
Nitrogen precharge is too high. Check and reset pressure as
needed.
Operating pressure is too low. Check and reset pressure as
needed.
Nitrogen precharge pressure is too Check and reset as needed.
low.
Reduced breaking power. HP accumulator failure. Repair as needed.
Operating temperature is too high. Correct overheating problem. See
Problem: Operating temperature
too high on page 10-3.
Tool binding in bushing(s). Repair or replace as
needed—check for proper lubrica-
tion.
Return line pressure is too high. Locate and correct problem.

06/16/03 10-2
Allied Hy-Ram Models 730, 740 & 745

This page intentionally

left blank.

10-3 06/16/03
Allied Hy-Ram Models 730, 740 & 745

SECTION 11.0
CARE AND MAINTENANCE

11.1 Care and Mainenance Monthly

Shedule
· Check piston impact surface for dents.
· Check impact surface (top) of demolition
tool for chips.
During Shift · Check surface of upper tool bushing for
cracks, chips, wear or looseness.
· Lubricate demolition tool every two
hours or anytime the tool appears dry.
(See 8-5.)
At Hammer Rebuild
· Check lube fitting for damage.
· Check high pressure accumulator for
proper nitrogen pressure.
Daily
· Tighten threaded connections (during
As Required
first 50 hours)
· Check for leaks in hydraulic lines. · Replace bent and damaged tubes.
· Check that pipe clamps fit correctly. · Replace any damaged hose(s).
· Check mounting brackets for wear. · Clean hydraulic oil filter.

Weekly
· Check threaded connections.
· Check retainer pin for burrs.
· Check retainer pin and plunger spring in
tool holder for tight fit.
· Check demolition tool for burrs. Pay spe-
cial attention to slot area.

Every Two Weeks

· Check precharge chamber pressure.
· Check demolition tool for wear.
· Check lower tool bushing for wear.
· Check side plates for wear.

06/16/03 11-1
Allied Hy-Ram Models 730, 740 & 745

11.1.1 Warranty Protection

Maintain written records of Hy-Ram main-

tenance, service and repair. These records Upper Tool
Bushing
will be helpful if warranty coverage is ever
in question. Each record shall include :
Tool Holder Lower Tool
· The date of service, maintenance or re- Bushing

pair.
· A description of the service, maintenance
or repair performed. Include part num-
bers if applicable.
· Copies of purchase order(s) and in- Figure 11-1. Checking Wear Of Tool Bushings
voice(s) for repair parts and service.
· The name and signature of the person
performing the service, maintenance or
repair. Check the inside diameter of the lower tool
bushing every time the demolition tool is
changed and at the least, every 100 operat-
ing hours. Determine the allowable diame-
ter from the following table. If the
diameter has increased to more than the
11.2 Care and Maintenance specified dimension, both tool bushings
Instructions must be replaced.

Refer to Sections 11.2.1 thru 11.2.15. Tool Bushing Diameter

730 740 745
11.2.1 Checking Hydraulic Lines for 3.3 in. 4 in. 4 in.
(83mm) (102mm) (102mm)
Leaks Before Starting Work

1. Visually check all hydraulic lines (tubes

NOTE
and hoses) from the pump to the hydrau-
lic hammer and back into the tank. It is recommended that the Hy-Ram
be taken to an Allied distributor ser
2. Tighten any loose fasteners and hose
vice department to make this repair.
clamps.
The tool bushings must be replaced by a
3. Replace any damaged tubes or hoses.
service technician in a suitably equipped
workshop.
11.2.2 Daily Checking for Cracks

Check the side plates for cracks everyday.

11.2.4 Checking Impact Face of Piston for
11.2.3 Checking Wear to the Tool Wear
Bushings
The impact face of the piston must be
(Refer to Figure 11-1.) checked each time the demolition tool is

11-2 06/16/03
Allied Hy-Ram Models 730, 740 & 745

changed or at least once a month. After the

demolition tool has been removed, proceed
as follows:
1. Shine a light on the piston’s impact sur-
face and check for dents or chipping.
2. Do not operate the Hy-Ram if dents or
chips are evident.
3. Contact your authorized Allied service
center.
Figure 11-2. Check Wear To Demolition Tool
11.2.5 Checking Wear to the
Retainer Pin

1. Check the retainer pin every time the ~ CAUTION

demolition tool is changed or removed. Do not allow the shank of the tool
to get too hot if using a grinder to
2. If excessive wear such as sharp edges, remove burrs.
notches or dents are found, replace the
retainer pin.
3. Carefully smooth off any burrs found on 11.2.7 Inspect Dust Ring
the retainer pin.
The Models 730, 740 and 745 do not have a
dust ring.
11.2.6 Checking Wear to the Demolition
Tool

(Refer to Figure 11-2.)

Check the demolition tool diameter each
time it is changed or at the least, every 100
operating hours. If the shank diameter of
the demolition tool has worn to less than
the dimension listed in the following table,
the demolition tool must be replaced.
Burrs on the shank of the demolition tool
and on the retainer pin must be smoothed
off carefully. A grinder may be used observ-
ing the following CAUTION .

Demolition Tool Outside Diameter

730 740 745
3.03 in. 3.82 in. 3.82 in.
(77mm) (97mm) (97mm)

06/16/03 11-3
 Allied Hy-Ram Models 730, 740 & 745

11.2.8 Check Tightness of Threaded Connections

The hydraulic hammer threaded connections are subjected to high stresses. All hydrau-
lic hammer threaded connections must be checked daily for the first 50 operating hours
and thereafter once a week. Loose connections shall be tightened to the specified torque.
Refer to the Torque Table below for applicable connections. Figure 11-3 on the following
page shows the item numbers referenced in the table. This table and the following figure
show the Models 730 and 740.

Torque Table for Allied Hy-Ram Models 730, 740 and 745
Connection Item Interval Ham- Tool Torque Req’d.
No. mer Required Ft Lbs. (Nm)
Model Lubricated
Tension bolts 1 As All Socket Wrench 1-5/8 in.
Model 730 Required Socket Wrench 2 in. 150 (200) +60o+90o*
Models 740 and 745 150 (200) +120o+210o*
Fill Valve G 2 Weekly All Socket Wrench 7/8 in. 148 (200)
Connections 3 Weekly All Open-end Wrench 1-1/4 in. 738 (1000)
P&T Open-end Wrench 1-1/2 in. 738 (1000)
High -pressure 4 As Required All Accumulator Wrench Assem- 1475 (2000)
Accumulator bly Allied Part No. 667341
Lube Fittings 5 As Required All Socket Wrench 9/16 in. —
Threaded plug (on side of 6 As 730 Socket Head 8mm —
lower hammer part) Required only
Hammer bracket 7 Weekly 730 Socket Wrench 1-5/8 in. 575 (780)
only
Hammer bracket 8 Weekly All Socket Wrench 2 in. 1180 (1600)
Hose connection on hy- — As All Open-end Wrench 1-1/4 in. —
draulic hammer Required Open-end Wrench 1-1/2 in.
*A flat is one of the six hexagonal edges of the top of the tension bolts. The number in
parentheses ( ) indicates the number of flats that correspond to the number of degrees to
be tightened.
o
60
o
120
180o

Rotate thru Rotate thru Rotate thru

1 Flat = 60o 2 Flats = 120o 3 Flats = 180o

1 3
In each of the following steps, tighten the tension
bolts in a diagonal sequence as shown to the right.
Step 1: Tighten all bolts to specified torque.
Step 2: Tighten all bolts specified number of degrees. 4 2
Step 3: Tighten all bolts specified number of degrees.

11-4 06/16/03
Allied Hy-Ram Models 730, 740 & 745

3 1
2
3

4 8

6
7
Hy-Ram Model 730

1
3
2
3

8
Hy-Ram Model 740
Figure 11-3. Models 730, 740 & 745 Torque Items on Hammer

06/16/03 11-5
Allied Hy-Ram Models 730, 740 & 745

11.2.9 Checking the Nitrogen Precharge Nitrogen Precharge Chamber Pressure

psi (bar)
Chamber. (Refer to Figure 11-4.) 70oF. (21oC.)
730 740 745

~ WARNING
154 psi
(11 bar)
141 psi
( 10 bar)
168 psi
( 12 bar)
When checking the chamber, make 150oF. (65oC.)
sure no one is in the vicinity of the 180 psi 165 psi 195 psi
demolition tool. If the demolition (12 bar) (11 bar) (13 bar)
tool is jammed, an increase in pres-
sure in the chamber may release it
suddenly. 7. After pressure reading is obtained,
quickly remove test gauge nozzle from
fill valve G. The fill valve check will au-
G tomatically close to seal.
8. Replace fill plug in fill valve.

Pressure Gauge
~ CAUTION
Before removing the complete fill
valve G for repair, the precharge
chamber must be totally
depressurized or injury could result.

Figure 11-4. Typical Hy-Ram Nitrogen Precharge

Chamber ~ CAUTION
Use only the hose nozzle to relieve
1. Clean the area around the fill valve plug
the pressure. Using nails,
G on cylinder head.
screwdrivers or similar objects will
2. To check the pressure, lay the Hy-Ram damage the fill valve.
on its side with no contact pressure on
the demolition tool.
3. Remove the screw plug from fill valve G. 11.2.10 Refilling the Precharge
Chamber
4. Firmly insert test guage hose into fill
valve. Refer to Figure 11-4. (Refer to Figure 11-5.)
5. Read the pressure. WARNING
6. Refer to the following table for the cor- The nitrogen precharge chamber shall only
rect pressure. A tolerance of plus 0/ mi- be filled with 99,8% pure nitrogen gas.
nus 5 psi is acceptable. Pressures are Make sure no other gas, e.g. air or oxygen,
given for temperatures at 70oF. (21oC.) is allowed into the precharge chamber:
and 150oF. (65oC.) THIS COULD RESULT IN AN EXPLO-
SION!

11-6 06/16/03
 Allied Hy-Ram Models 730, 740 & 745

Minimess Connection
G head.
Nozzle
Pressure
Gauge

11. Close the nitrogen cylinder valve when

the reference value has been reached.
Pressure Relief
Valve Quickly remove fill nozzle from fill
valve. The fill valve check will automati-
cally close to seal. Refer to the table on
Gas Cylinder
page 11-6 for the correct pressure for
Valve
the model number Hy-Ram being filled.
Figure 11-5. Filling the Nitrogen Precharge Pressures are given for temperatures at
Chamber 70oF. (21oC.) and 150oF. (65oC.)
12. Bleed remaining gas from regulator and
When the pressure in the nitrogen disconnect it from nitrogen tank
precharge chamber drops more than 15
psi (1 bar) at 70oF. (21oC.) or 20 psi (1.5
bar) at 150oF. (65oC.), the chamber must
be refilled as follows:
~ CAUTION
1. Connect nitrogen regulator valve to ni- Use only the hose nozzle to relieve
trogen cylinder. the pressure. Using nails, screw-
drivers or similar objects will dam-
2. Clean the area around fill valve plug on age the fill valve.
cylinder head.
3. Connect one nozzle of the filling hose to
the nitrogen regulator valve. 13 Press free nozzle of test hose into fill
valve G and read pressure.
4. Back out the nitrogen regulator pres-
sure adjustment. 14. Make any adjustments necessary so
that the correct pressure is set.
5. Open valve on nitrogen cylinder.
15. Close fill valve G with screw plug.
6. Remove plug from fill valve G.
16. Remove nitrogen regulator from
7. Carefully blow out filler assembly to re-
cylinder and recap.
move any internal foreign matter.
8. Press free nozzle of filling hose into fill 11.2.11 Checking the High
valve G. Maintain in this position by ap-
Pressure Accumulator
plying a steady but moderate force.
9. Open the nitrogen regulator valve
slowly allowing nitrogen into precharge ~ WARNING
chamber. Pressure increase can be read Never attempt to open or repair
on the pressure gauge. the high-pressure accumulator. De-
fective high-pressure accumulators
10. Allow approximately 15 seconds for gas must be rebuilt by a qualified ser-
chamber in Hy-Ram to fill, or, under vice technician.
quiet conditions, until the gas can no
longer be heard entering the cylinder

06/16/03 11-7
Allied Hy-Ram Models 730, 740 & 745

If the return line hose from the hammer

(which normally pulsates lightly to moder-
ately)) starts to pulsate strongly, the
high-pressure accumulator may not be
working properly.
Turn off the Hy-Ram immediately. The
high-pressure accumulator must be
repaired by a qualified service technician.

11.2.12 Checking Mounting Pins

Visually check the mounting pins every

time the hammer is removed from the car-
rier. If the pins show signs of excessive
wear, cracks, notches or dents, they must
be replaced.

11.2.13 Checking The Side Plates

The side plates shall be checked at least

twice a month for cracks or heavy wear.
Contact Allied for recommended repair or
rebuild procedures.

11.2.14 Checking And Cleaning The Hy-

draulic Oil Filter If Equipped

1. On new hydraulic hammer installa-

tions, clean the oil filter for the first time
after eight (8) operating hours, and the
second time after fifty (50) operating
hours.
2. Thereafter, check the oil filter every 500
hours and clean if necessary.

11.2.15 Checking And Cleaning The Hy-

draulic Oil Filter On The Carrier

Refer to the carrier manual and change

and clean the oil filter in the carrier as in-
structed.

11-8 06/16/03
Allied Hy-Ram Models 730, 740 & 745

SECTION 12.0
LIFTING & TRANSPORT

If the hammer is to be transported inde- 5. Adequately stabilize and secure the

pendently of the carrier: hammer for transport.
1. Remove all loose debris from hammer. If the hammer is transported while in-
stalled on the carrier:
2. Follow removal instructions in Section
7.9. 1. Remove all loose debris from hammer.
3. Secure hoses to unit to avoid accidental 2. Secure hoses to unit to avoid accidental
damage. damage.
4. Lift the hammer at approved lift points 3. Inspect the mounting pins and hard-
only with appropriate lifting equipment. ware for damage and integrity.
See Figure 12-1.

~ WARNING
Do not lift the hammer by the
mounting pins. The hammer may
shift and cause damage or
personnel injury.

Figure 12-1. Hammer Lift Point

06/16/03 12-1
Allied Hy-Ram Models 730, 740 & 745

SECTION 13.0
STORAGE OF THE HAMMER

13.1 Storing Hy-Ram on the Carrier 5. Using a rod or tube, push the piston to
its highest position.
The Hy-Ram shall be stored in the vertical
6. Block the piston with a rod or tube so it
position with the tool pushed all the way in.
cannot return to the down or out posi-
This lifts the piston into its uppermost po-
tion.
sition. In this position, the sliding surfaces
are covered by oil. 7. Fill the connections on the hammer with
hydraulic oil.
13.2 Short Term Hy-Ram Storage off the 8. Close threaded connections P and T.
Carrier—14 Days or Less
9. Close the bore for the demolition tool us-
ing either the protective plug or a clean
1. The Hy-Ram may be stored on or off the
rag.
carrier in a vertical or horizontal posi-
tion with no special storage require-
ments.
~ CAUTION
2. If storing the Hy-Ram in a horizontal The weight of the piston can cause
position, the top of the hammer should flattening and damage to the seals
be higher than the tool end to prevent and O-rings when storing a Hy-Ram
water from entering the tool holder. in the horizontal position.
3. If outside, cover with a waterproof tarp.

13.3 Long Term Hy-Ram Storage off the ~ CAUTION

Carrier—More than 14 Days Surface condensation on the nor-
mally exposed lower area of the pis-
1. Refer to Section 8.4 and remove the de- ton can cause destructive rust and
molition tool from the Hy-Ram. pitting of the piston in the lower
seal contact area.
2. Drain the nitrogen precharge chamber.
3. Remove the hydraulic hoses.
10. Store the Hy-Ram blocked in an upright
position or on a stand. The piston must
~ CAUTION be blocked in the upper position.
Several liters of oil will run out when 11. If possible, stand the hammer upside
threaded connections P and T are down. The piston will slide to the top of
opened. This oil must be collected
the hammer.
and disposed of correctly.

4. Open threaded connections P and T.

13-1 06/16/03
 Allied Hy-Ram Models 730, 740 & 745

~ CAUTION
Secure the hammer so that it can-
not fall over.

13. If outside, cover hammer with a water-

proof tarp.

06/16/03 13-2