1.

General Requirement and Technical Specification for Bull Dozer

REQUIRED SPECIFICATION & QUANTITY FOR BULL DOZER

General Specification

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offered on specification
offered
1.1 Scope
It is the intent of this specification to describe a diesel engine driven, crawler tractor, equipped with
hydraulically operated semi-universal dozer with power tilt cylinder & one shank rippers with
hydraulically variable pitch having operating weight of minimum 37,000 kg

1.2 Service Requirement

The Crawler Tractor be supplied shall be used in construction projects in Ethiopia where the
following climate altitude and temperature variations shall be experienced:-

 Climate varies from humid tropics to arid desert.

 Temperature varies from 00C to 50 0C
 Altitude varies from sea level to an average of 2500 meters elevation
 Minimum Technical requirements including applicable standards Specification Evaluations remark
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1.3 Manufacturing Requirements
 All parts attachments and accessories not specifically mentioned of this specification but
essential for dependable and efficient operation of the unit shall furnishes by the supplier as part
of bid and shall be in accordance with the current engineering and manufacturing practices and
according to prevailing trade provisions in general
1.4 Materials (MANDATORY)
 The materials of which all parts attachments accessories and component of the unit bid upon are
manufactured and assembled shall be of the current and latest model in its class and technology
plus durable and reliable for the intended purpose. The finish shall be of high quality and good
workmanship with dependable operation.

 Bidders are required to specify the type and class of steel used to construct (manufacture) the
unit bid upon.
 Bidders are required to attach certification of steel grade used to construct the unit bid upon
from the manufacturer with reference of known and accepted international standard applied.

1.4 Warranty (MANDATORY)

 The supplier or the bidder shall guarantee that all items included and or furnished with this
upon shall be new unused of the most recent or current models and incorporate all recent
improvements in design and materials.

 The bidder should also guarantee to replace free of charge (Transport Labor and other expenses
incurred thereof) any parts or component that breaks or fail to functions in any manner under
the service conditioned described herein due to defective or inferior materials of poor
workmanship with in a period of two year or 2000 hrs. Whichever comes last, from the date of
receipt of the unit at final destination?]
 Supplier shall state to provide for extra 1000 hr. or 1 year.

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 Minimum Technical requirements including applicable standards Specification Evaluations remark
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1.5 Recommended Parts List
 The bidder must furnish the suggested list of recommended spare parts for the first 5000 hrs. of
operation or with prices valid for a period of one year.
 Bidders are also required to furnish service parts or service kits for the first 2000 Hrs. of
machine operation.
1.6 Pre-Delivery Service
 The manufacturer or his delegated shall provide washing, lubrication and inspection and service
before the machine is put into operation.

1.7 Service Requirement

The Dozer to be supplied shall be capable of operating at different sites in Ethiopia where the
following operating conditions are experienced;

 Climate varies from humid tropics to arid desert.

 Temperature varies from 00c to 500c.
 Altitude varies from sea level to an average of 2500 m elevation

 Uneven, bumpy and loose gravel road surfaces.

1.8 Specification Waiver
Buyer reserve the right to partially or fully waive compliance to any of these specifications, and
makes awards on the basis that the interest of the Authority is best served.

1.9 After Sale Service Requirement. (Fundamental)/non fundamental

The bidder/Supplier shall under take all required preventive maintenance service & break down
maintenance of the unit bid up on in its after sale service facility/its certified local agents
maintenance facility and at operation sites (if required) for a period of machine acceptable &
recommended operation life time.( should furnish)

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 Minimum Technical requirements including applicable standards Specification Evaluations remark
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1.10 Dealership Preference. (Fundamental)
Preference of award will usually be given by the buyer to the bidder/supplier fulfilling each of the
following;
 A well-established own/local agent after sale service facility in Addis Ababa.
 A mix of skilled technical personnel, proficient enough to undertake repair and maintenance
service of the unit bid up on including any warranty claims of the equipment
 Adequate in stock capacity of spare parts of the equipment to be furnished and document
showing spare part turn over.
 Who can submit written evidences of supplies of such machines with a proven performance
from customers?

1.11 Training
Technical training on operation for two operators, repair and maintenance of the unit bid upon for
two technicians shall be Provided locally at the expense of the supplier/bidder.

1.12 Manuals and Tools

One copy of each of the following manuals in hard copies shall be supplied with the unit machine:
a. Operation manual
b. Spare parts catalogue
c. Service manual (shop/repair)
d. Mechanical & hydraulic repair tools/kits for each machine
e. Inbuilt GPS tracking system technology which controls productivity, idle time, fuel, equipment
safety etc
All manuals & catalogues shall cover the equipment itself, and all the components, attachments and
accessories thereof and any advertising literature will not be acceptable instead of these manuals. All
these materials shall be the English versions that are correctly worded which avoid any
misinterpretation of specification; terms in analyzing the bid.

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 Minimum Technical requirements including applicable standards Specification Evaluations remark
offered on specification
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1.13 Proven Performance
The dozer offered shall be current standard model of production which is substantially the same as
the model in successful use for a period of not less than one year or 2000 working hours of
operations.

1.14. Others
Bidder must provide the following data:
 Manufacturer’s recommended lubricants and their change intervals (grease and oils, engine,
hydraulic, transmission, final drive, etc.)
 Manufacturer’s recommendation of the change intervals of all filters (air cleaner, fuel filters,
engine oil filters, hydraulic oil filter, transmission oil filters etc.)

1.15 Color
The Crawler Dozer shall be painted manufacturers standard color.

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II TECHNICAL REQUIREMENT
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1 Engine
1.1 General
The diesel engine should perform smoothly and efficiently under all
conditions of operation described above & shall develop the rated
horsepower, when operating on commercial diesel fuel of locally available
with less Sulfur.

1.2. Engine Type-Four cycles, water-cooled, diesel driven, turbo

charged inter/after cooled, six cylinders & shall be equipped with
replaceable wet type cylinder sleeves/liners.

1.3. Engine power

 Rated Net power…………… 280- 310 kw @2000RPM

 Displacement ……………… to be indicated
 Type……………………………6 cylinder in-line-engine
 Cooling system…………. (wet-sleeve) water-cooled, turbocharged,
intercooled
 Injection system ……………. Direct fuel injection, pump-line-nozzle
Common Rail system, shall be mechanical fuel injection

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 Lubrication system………Force-feed lubrication, engine lubrication
guaranteed.
 Operating voltage…………… 24 V
 Air cleaner………………Dry-type air cleaner with safety element,
aspirated pre-cleaner, service gauge in cab.
 Cooling system………………Combined radiator, comprising a
radiator for water and charge air. Hydrostatic fan drive
1.4. Required Engine Data
 The manufacturer should submit certified engine data according to SAE
standard with his bid showing net power, torque and specific fuel
consumption curves at governed RPM at sea level and 2500m
elevation.
 The supplier should also furnish certified average fuel consumption per
hour when the dozer is working under heavy workload.

1.5. Lubrication System

 Full force-feed type.
 Two replaceable full flow & by-pass cartridge filters.

 Should be Equipped with oil cooler

 Oil pump should be strainer protected.
 Oil sump should be steel guarded

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2. Fuel System
2.1. Fuel Tank
 Properly ventilated, protected both internally & externally from
corrosion and under side is guarded.
 Adequate capacity to operate the machine for at least 10 hours
continuous operation under average load.
 Made from repairable steel.
 Tank filler should contain a strainer
 Tank cap should be lockable.
 Should indicate steel certificate
2.2 Injection Pump
 Inline, unit injection, mechanical driven, high pressure pump with all
speed governor control arrangement
.

2.3 Fuel Filter
 Minimum two in series.
2.4 Water Separator
 Installed in the diesel supply system & also retain rust, metal chips
& dirt particles.

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3 Cooling System
 Tropicalized, closed pressurized, pump forced type.
 Incorporate efficient tropicalized thermostat.

 All the cooling system heat exchangers shall be independent of one

another i.e. the removal of the engine cooler (for repair) should not
affect the hydraulic oil cooler.
 Separate hydraulic oil cooler, hydrostatically driven, should be
thermostatically controlled

3.1. Radiator
 Tropicalized, heavy-duty construction properly mounted and -
equipped with core protection grill.

 Upper & lower channels/tanks as well as core shall be made from

brass &/or copper of repairable type.
 Equipped with altitude compensator.

3.2 Cooling Fan

 Hydrostatically driven using thermostatically controlled fan (preferably)
or mechanical driven.

4 Air Cleaner -
 Heavy-duty, two stage dry type
 Fitted with a cyclone pre-cleaner.
 Fitted with automatic dust evacuator.
 Dust indicator with restriction gauge/indicator.

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5 Electrical System
 Composed of but not limited to a complete 24V electric starting,
charging, lighting systems & electronic voltage regulator.
 The wire harness shall be colored, number coded & all wiring shall be
enclosed in non-metallic loom.

5.1 Starting System

 An electric motor shall start the engine satisfactorily at temperatures as
low as 00C without recourse to any auxiliary heating or starting device,
glow plugs, or fluid priming system required.
 Reduction type starter motor.
 Starter motor capacity, …………..….min 7.5kW

5.2 Alternator -
 Heavy-duty fan ventilated
 Rated capacity ………………….. Of 24V/80Amp
5.3 Batteries
 2 x 12V in series and each 225 AH (minimum) at 20 hours rating.
 Mounted at a convenient place in a metal box with hold down device,
cushioned & shall be located so as to provide easy access for servicing.
5.4 Lighting System
The lighting system shall consist of but not limit to:
 Back up light with alarm
 Work lights (front & rear)
 Panel lights
 Cab interior light

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6 Transmission
 Hydrostatic transmission with infinitely variable speed. Or power shift
with planetary gears
 Minimum three speeds forward and three speeds reverse
 Independent drive for each track
 Drawbar pull and travel speed graph should be indicated and show in
the original brochure. Maximum Drawbar pull should be more than
550kN
 Top speed ……..should be minimum 11 Km/hr
 The system should have magnetic type drain plugs.
 Electronic Engine speed sensing control to automatically adjust travel
speed per workload

 Wear-free dynamic breaking service brake

 Wear-free multiple-disc brakes automatically applied parking break.

7 Steering system …………………. Should be indicated

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8 Under Carriage
 Undercarriage with single bogie suspension .
 Components should be sealed against entry of abrasives & foreign
material.

 Track roller should be individually removable and interchangeable.

 Track roller, carrier rollers and idlers shall be lifetime lubricated
 Track chains to be provided with hydraulic adjusters.
 Shoe type :………………….…...Moderate service
 Width of shoe……………............… min 610 mm
 Number of shoe each side....Should be indicated
 Grouser height: ………………..………Min 84mm.
 Ground clearance : ……………..….…Min 622mm
 Ground contact area :……..………….min 3.91m2
 Number of track roller each side:………should be indicated
 Ground pressure……………..should be indicated
 Track guard …………………….should be supplied
 Undercarriage with single bogie suspension
 Sprocket segments with recesses

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9 Hydraulic System
9.1 Hydraulic controls
 Hydraulic tank oil level warning light……..shall be indicated
 Pump type ………...Swash plate variable displacement piston
 Pump flow ………..Min. 235L/min
 Hydraulic tilt:………….min. 950mm.
 Consisting of pumping section for steering, transmission, dozing
equipment and single shank ripper operation equipped with adequate
capacity of tanks line filters and relief valves.
 The engine shall mechanically drive the pumping system.
 Hydraulic oil cooler shall be incorporated in the system.
9.2 Hydraulic controls main relief valve
 Pressure setting: ……………. Should be indicated
9.3 Hydraulic control maximum operating Pressure
 Bulldozer, lift: …….Should be indicated, (KPA)
 Bulldozer, tilt: ….Should be indicated, (KPA)
 Ripper lift: …………Should be indicated, (KPA)
 Ripper tilt: …………Should be indicated, (KPA)

9.4 Hydraulic Pressure Hoses

 The hose shall consist of a seamless oil resistant synthetic rubber tube,
one braid of high tensile steel wire & a weather & oil resistant rubber
cover with hydraulic hose fittings at either end.
 Fittings shall be threaded to standard pipe threads & equipped with
swivel fittings at one hose end.
 Hose shall be clip fashioned.

9.5 Hydraulic Hoses

 High pressure & temperature resistance type
 Reinforced by high tensile steel wire braid and covered and/or protected
from external damage.
 Designed to resist internal & external stresses (abrasion resistance) as
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10 Dozing Equipment
10.1. Blade
 Type… Semi-Universal straight tilt type dozer blade (“SU”).
 Blade capacity : ……… min 8.70m3
 Blade width: …………… Min 4000 mm
 Blade height: ……………Min 1650 mm
 Lift above ground : ………Min1350 mm
 Drop below ground : …..Min 560 mm
 tilt : ……………………..Min 950 mm
 Digging depth: Minimum 550 mm.
 The dozing tool shall be hydraulically operated with push-pull arms &
tilting arrangement & it shall be made of high grade, heavy-duty arc
welded box framed steel construction suitable for use with the track
tractor specified herein.
11 Cutting Edge
 Reversible type with separate heavy-duty end-bits
 Cutting edge and end-bits shall be bolted on to the mold board with
counter sunk head bolts.
12 Ripper
 Type…..Hydraulically operated single-shank ripper.
 Maximum penetration force : ……120(KN)
 Pry out force: should be indicated …..280 (KN)
 Ripping depth :………………… minimum 1150mm
 Ripper weight with standard single shank:……. Maximum 3700Kg
13 Dimensions
 Width of tractor : ……………..should be indicated
 Height from tip of grouser : ….. Max. 3600 mm
 Length of track on Ground……Min 3000mm
 Ground clearance : …………….Minimum 600mm

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14 Cab
 Open IROPS Canopy with Vinyl operator’s seat

15 Operator’s Seat
 Comfortable & adjustable suspension seat with arm rests.
16 Instrumentation
 The instrument panel shall include but limited to: -
16.1 Meters:
 Tachometer
 Hour meter
 Ammeter or Volt meter
16.2 Gauge:
 Fuel
 Water (coolant) temperature gauge
 Hydraulic oil temperature
 Hydraulic oil level
 Engine oil pressure
 Air pressure etc
16.3 Indicator and Warning light:
 Air cleaner element service
 Battery condition indicator
 Low break pressure
 Transmission and hydraulic filters service
 Low engine oil pressure
 Engine coolant overheat & level
 High transmission temperature.
 Torque converter overheats.
17 Others:
 Lighting switches
 Windshield wiper control
 Other required accessories for proper & efficient operation

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18 Additional Essential Accessories Required
a. Manufacturer standard extreme service steel crankcase guard
b. Front and rear hooks
c. Vertical heavy-duty muffler with rain protection cap.
d. Cap locks for fuel and hydraulic tanks
e. Back-up alarm
f. Steel heavy-duty radiator guard
g. Track guiding guard
h. Track roller guard
i. Transmission & power train guard.
j. Two sets of all keys
k. Electric horns
l. Sun visor
m. Vandal protection for all compartments including fuel tank, Radiator,
hydraulic tank

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19 Field Kits
The unit & total price for each of the items in field kits shall be strictly
provided in sequence (i.e. item by item), by indicating the description
(contents of the repair kit), individual part No. & each set required per unit
(quantity per unit & total quantity to be supplied).
1. 2 each sets of all required belts
2. 1 set of all engine top overhaul gaskets for 2 units
3. 1 set of water pump repair kit for 2 units
4. 1 set of turbo-charger repair kit for 2 units
5. 1 each set of starter repair kit for 2 units
6. 1 each set of alternator repair kit for 2 units
7. 1 each set of break repair kit for 2 units
8. 2 each set of all hydraulic ram packing seals and gaskets for all
cylinders.
9. 20 each sets of all engine oil filter elements for each machine.
10. 10 each sets of all fuel filter elements for each machine.
11. 2 each sets of all air cleaner elements for each machine.
12. 5 each sets of all hydraulic filter elements for each machine.
13. 1 each set of injector nozzles assay for each machine.
14. 4 each sets of all electric lamp/bulbs and fuses.
15. 2 each sets of water separator. (If it is separately fitted and serviced)
16. 2 each sets of all belts employed.
17. 1 set of all cooling hoses
18. 1 set of hydraulic and other fluid hoses.
19. 1 each lockable fuel and radiator cap for each machine.
20. 1 each radiator cap
21. 4 each sets of ripper tips, end bits, Cutting edges with bolts, nuts &
necessary fittings for each units
22. 1 each set of all brake hoses
23. 1 set of track master link bolts for each
24. 1 set of sprocket segments for each unit.
25. 1 set of Single & double flanged roller for each units
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 Annex II.
Caterpillar recommended lubricants and their change interval at 1% Sulphur content and working condition should specified in the tender requirement

Bidders
 Bidders must provide numerical response to the request criteria.
 A catalog/brochure should be demonstrating technical specification must be available.
 Bidders must be provide responses for all fundamental criteria abide that does not provide a response for one or more fundamental
criteria will be disqualified. It will not be considered for price competition.

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