® MODELS

JU6H-UFD0 JU6H-UF34 JU6H-UFABL2 JU6H-UF58 JU6H-UFAB76 JU6H-UFAAQ8

JU6H-UFD2 JU6H-UFG8 JU6H-UFM8 JU6H-UF50 JU6H-UF68 JU6H-UFAAPG
FIRE PUMP ENGINES JU6H-UF30 JU6H-UFABL8 JU6H-UFM0 JU6H-UF52 JU6H-UF60 JU6H-UFAARG
JU6H-UF32 JU6H-UFABL0 JU6H-UFM2 JU6H-UF54 JU6H-UF62 JU6H-UF84 JU6H-UFAAS0

FM-UL-cUL APPROVED RATINGS BHP/KW

RATED SPEED US-EPA
JU6H (NSPS)
MODEL Available
1470 1760 2100 2350 2600 2800 3000 Until


UFD0 110 82 144 107 148 110 12/31/09
UFD2 148 110 148 110 12/31/09
UF30 94 70 140 104 160 119 160 119 12/31/09
UF32 160 119 160 119 12/31/09
12/31/11 ▲
UF34 160 119 175 131
12/31/12 ▼+
UFG8 130 97 149 111 12/31/09
UFABL8 136 101 173 129 12/31/09
UFABL0 173 129 173 129 173 129 12/31/09
UFABL2 173 129 173 129 12/31/09
UFM8 136 101 175 131 12/31/09
UFM0 175 131 207 154 200 149 12/31/08
UFM2 200 149 200 149 12/31/08
UF58 138 103 183 137 12/31/08
UF50 183 137 210 157 210 157 12/31/08
UF68 175 131 200 149 12/31/08
UF52 210 157 210 157 12/31/08  USA EPA (NSPS) Emissions Compliant. Applies to John
UF54 216 161 216 161 12/31/11 Deere model year per Table 4 of 40 CFR Part 60 Sub Part
UFAAPG 220 164 N/A  IIII.
UFAB76 225 168 12/31/11
 All Models are available for Export
UFAAQ8 227 169 N/A 
UF60 200 149 240 179 240 179 12/31/08  N/A = Not Applicable / Non-Emissionized
UF62 240 179 240 179 12/31/08
+ Not Available in California
UFAARG 252 188 N/A 
UF84 259 193 275 205 12/31/11
/ / ▼ Less than 175 HP
UFAAS0 260 194 N/A 
▲ Greater than 174 HP
SPECIFICATIONS
JU6H MODELS
ITEM D0 D2 30 32 34 G8 ABL8 ABL0 ABL2 M8 M0 M2 58 50 52 54 AB76 68 60 62 AAQ8 PG AARG/S0 84
Number of Cylinders 6
Aspiration T TRWA
Rotation* CW
Weight – lb (kg) 1657 (750) 1693 (766)
Compression Ratio 17.0:1
Displacement – cu. in. (L) 414 (6.8)
Engine Type 4 Stroke Cycle – Inline Construction
Bore & Stroke – in. (mm) 4.19 x 5.00 (106 x 127)
Installation Drawing D536
Wiring Diagram AC C07591
Wiring Diagram DC C071590
Engine Series John Deere 6068 Series
Speed Interpolation OPT.

Abbreviations: CW – Clockwise T – Turbocharged TRWA – Turbocharged with Raw Water Aftercooling

*Rotation viewed from Heat Exchanger / Front of engine
CERTIFIED POWER RATING ENGINE RATINGS BASELINES
• Each engine is factory tested to verify power and performance. • Engines are to be used for stationary emergency standby fire pump service only. Engines
are to be tested in accordance with NFPA 25.
• Although FM-UL ratings are shown at specific speeds, Clarke engines can be
applied at any intermediate speed. To determine the intermediate speed • Engines are rated at standard SAE conditions of 29.61 in. (752.1 mm) Hg barometer and
power; makek a lilinear iinterpolation
t l ti from
f the
th Clarke
Cl k FM
FM-UL
UL power curve. 77°F (25°C) inlet air temperature [approximates 300 ft. (91.4 m) above sea level] by the
Contact Clarke or your Pump OEM Representative to obtain details. testing laboratory (see SAE Standard J 1349).
• A deduction of 3 percent from engine horsepower rating at standard SAE conditions shall
be made for diesel engines for each 1000 ft. (305 m) altitude above 300 ft. (91.4 m)
FM • A deduction of 1 percent from engine horsepower rating as corrected to standard SAE
conditions shall be made for diesel engines for every 10°F (5.6°C) above 77°F (25°C)
ambient temperature.
Page 1 of 8
 ® MODELS
JU6H-UFD0 JU6H-UF34 JU6H-UFABL2 JU6H-UF58 JU6H-UFAB76 JU6H-UFAAQ8
JU6H-UFD2 JU6H-UFG8 JU6H-UFM8 JU6H-UF50 JU6H-UF68 JU6H-UFAAPG
FIRE PUMP ENGINES JU6H-UF30 JU6H-UFABL8 JU6H-UFM0 JU6H-UF52 JU6H-UF60 JU6H-UFAARG
JU6H-UF32 JU6H-UFABL0 JU6H-UFM2 JU6H-UF54 JU6H-UF62 JU6H-UF84 JU6H-UFAAS0

ENGINE EQUIPMENT
EQUIPMENT STANDARD OPTIONAL
Air Cleaner Direct Mounted, Washable, Indoor Service with Drip Shield Disposable, Drip Proof, Indoor Service Outdoor Type, Single or
Two Stage
Alternator 12V-DC, 42 Amps with Poly-Vee Belt and Guard 24V-DC, 40 Amps with Poly-Vee Belt and Guard
Exhaust Protection Metal Guards on Manifolds and Turbocharger
Coupling Bare Flywheel Listed Driveshaft and Guard, UFD0/D2/30/32/34 – CDS20-S1;
UFG8/ABL8/ABL0/ABL2/M8/M0/M2/58/50/52/54/AB76/68/60/62/84
– CDS30-S1; AAPG/AAQ8/AARG/AAS0 – CDS50-SC
E h
Exhaust Flex
Fl Connection
C i S i l
Stainless S
Steell Fl
Flex, 1150#
0# ANSI Fl
Flangedd Connection,
C i 5”” S i l
Stainless S
Steell Fl
Flex, 1150#
0# ANSI Fl
Flangedd Connection,
C i 6”
Flywheel Housing SAE #3
Flywheel Power Take Off 11.5” SAE Industrial Flywheel Connection
Fuel Connections Fire Resistant, Flexible, USA Coast Guard Approved, Supply and Stainless Steel, Braided, cUL Listed, Supply and Return Lines
Return Lines
Fuel Filter Primary Filter with Priming Pump
Fuel Injection System Stanadyne Direct Injection
Engine Heater 115V-AC, 1360 Watt 230V-AC, 1360 Watt
G
Governor, S
Speed
d C t t Speed,
Constant S d Mechanical
M h i l
Heat Exchanger Tube and Shell Type, 60 PSI (4 BAR), NPT(F) Connections –
Sea/Salt Water Compatible
Instrument Panel English and Metric, Tachometer, Hourmeter, Water Temperature,
Oil Pressure and Two (2) Voltmeters
Junction Box Integral with Instrument Panel; For DC Wiring Interconnection to
Engine Controller
Lube Oil Cooler Engine Water Cooled, Plate Type
Lube Oil Filter Full Flow with By-Pass Valve
Lube Oil Pump Gear Driven, Gear Type
Manual Start Control On Instrument Panel with Control Position Warning Light
Overspeed Control Electronic with Reset and Test on Instrument Panel
Raw Water Solenoid Operation Automatic from Fire Pump Controller and from Engine Instrument
Panel
Run – Stop Control On Instrument Panel with Control Position Warning Light
Run Solenoid 12V-DC Energized to Run 12V-DC Energized to Stop; 24V-DC Energized to Run; 24V-DC
Energized to Stop
St t
Starters T (2) 12V-DC
Two 12V DC T (2) 24V-DC
Two 24V DC
Throttle Control Adjustable Speed Control, Tamper Proof
Water Pump Centrifugal Type, Poly-Vee Belt Drive with Guard
Abbreviations :DC – Direct Current, AC – Alternating Current, SAE – Society of Automotive Engineers, NPT(F) – National Pipe Tapered Thread (Female)

Fire Protection Products, Inc. UK, Ltd.

3133 E. Kemper Rd., Cincinnati, Ohio 45241 Grange Works, Lomond Rd., Coatbridge, ML5-2NN
United States of America United Kingdom
Tel +1-513-475-(FIRE)3473 Fax +1-513-771-0726 Tel +44-1236-429946 Fax +44-1236-427274
www.clarkefire.com www.clarkefire.com

C13556 revL Specifications and information contained in this brochure subject to change without notice. .
13AUG13 Page 2 of 8
 FIRE PUMP MODEL: JU6H-UFAB76
Heat Exchanger Cooled/Turbocharged
Raw Water Charge Cooling
6.8L 6 cylinder
226.5

226

225.5

225 225
(168)

224.5

224

NSPS Compliant Emissions:

EPA
Ref: Engine Emission Label
223.5
2798.5 2799 2799.5 2800 2800.5 2801 2801.5
ENGINE SPEED - RPM
RESTRICTED:
USE ONLY FOR STAND-BY FIRE PUMP APPLICATIONS

ENGINE PERFORMANCE:
STANDARD CONDITIONS: (SAE J1349, ISO 3046)
77°F (25°C) AIR INLET TEMPERATURE NAMEPLATE BHP (MAXIMUM PUMP LOAD)
29.61 IN. (751.1MM) HG BAROMETRIC PRESSURE
#2 DIESEL FUEL (SEE C13940)
THIS DRAWING AND THE IN- CREATED DATE CREATED
FORMATION HEREIN ARE OUR 09/12/08
PROPERTY AND MAY BE USED BY
OTHER ONLY AS AUTHORIZED BY
US. UNPUBLISHED -- ALL RIGHTS
ENGINE MODEL JU6H-UFAB76
RESERVED UNDER THE DRAWING NO. REV
KEVIN KUNKLER 12SEP08 COPYRIGHT LAWS. C132713 A

Page 3 of 8
 JU6H-UFAB76
INSTALLATION & OPERATION DATA (I&O Data)
USA Produced
Basic Engine Description
Engine Manufacturer John Deere Co.
Ignition Type Compression (Diesel)
Number of Cylinders 6
Bore and Stroke - in (mm) 4.19 (106) X 5 (127)
Displacement - in³ (L) 415 (6.8)
Compression Ratio 17.0:1
Valves per cylinder
Intake 1
Exhaust 1
Combustion System Direct Injection
Engine Type In-Line, 4 Stroke Cycle
Fuel Management Control Mechanical, Rotary Pump
Firing Order (CW Rotation) 1-5-3-6-2-4
Aspiration Turbocharged
Charge Air Cooling Type Raw Water
Rotation, viewed from front of engine, Clockwise (CW) Standard
Engine Crankcase Vent System Open
Installation Drawing D536
Weight - lb (kg) 1693 (768)

Power Rating 2800

Nameplate Power - HP (kW) 225 (168)

Cooling System - [C051127] 2800

Engine Coolant Heat - Btu/sec (kW) 117 (123)
Engine Radiated Heat - Btu/sec (kW) 51 (53.8)
Heat Exchanger Minimum Flow
60°F (15°C) Raw H 20 - gal/min (L/min) 13.4 (50.7)
100°F (37°C) Raw H 20 - gal/min (L/min) 15.2 (57.5)
Heat Exchanger Maximum Cooling Raw Water
Inlet Pressure - psi (bar) 60 (4.1)
Flow - gal/min (L/min) 40 (151)
Typical Engine H20 Operating Temp - °F (°C)[1] 170 (76.7) - 190 (87.8)
Thermostat
Start to Open - °F (°C) 170 (76.7)
Fully Opened - °F (°C) 190 (87.8)
Engine Coolant Capacity - qt (L) 20 (18.9)
Coolant Pressure Cap - lb/in² (kPa) 10 (68.9)
Maximum Engine Coolant Temperature - °F (°C) 200 (93.3)
Minimum Engine Coolant Temperature - °F (°C) 160 (71.1)
High Coolant Temp Alarm Switch - °F (°C) 205 (96.1)

Electric System - DC Standard Optional

System Voltage (Nominal) 12 24
Battery Capacity for Ambients Above 32°F (0°C)
Voltage (Nominal) 12 [C07633] 24 [C07633]
Qty. Per Battery Bank 1 2
SAE size per J537 8D 8D
CCA @ 0°F (-18°C) 1400 1400
Reserve Capacity - Minutes 430 430
Battery Cable Circuit, Max Resistance - ohm 0.0012 0.0012
Battery Cable Minimum Size
0-120 in. Circuit Length [2] 00 00
121-160 in. Circuit Length [2] 000 000
161-200 in. Circuit Length [2] 0000 0000
Charging Alternator Maximum Output - Amp, 40 [C07639] 18 [C071048]
Starter Cranking Amps, Rolling - @60°F (15°C) 440 [RE69704/RE70404] 250 [C07819/C07820]

NOTE: This engine is intended for indoor installation or in a weatherproof enclosure. 1Engine H 2O temperature is
dependent on raw water temperature and flow. 2Positive and Negative Cables Combined Length.
Page 1 of 2

Page 4 of 8
 JU6H-UFAB76
INSTALLATION & OPERATION DATA (I&O Data)
USA Produced
Exhaust System 2800
Exhaust Flow - ft.³/min (m³/min) 1705 (48.3)
Exhaust Temperature - °F (°C) 942 (506)
Maximum Allowable Back Pressure - in H 20 (kPa) 30 (7.5)
Minimum Exhaust Pipe Dia. - in (mm) [3] 5 (127)

Fuel System 2800

Fuel Consumption - gal/hr (L/hr) 12.7 (48.1)
Fuel Return - gal/hr (L/hr) 8.2 (31)
Fuel Supply - gal/hr (L/hr) 20.9 (79.1)
Fuel Pressure - lb/in² (kPa) 3 (20.7) - 6 (41.4)
Minimum Line Size - Supply - in. .50 Schedule 40 Steel Pipe
Pipe Outer Diameter - in (mm) 0.848 (21.5)
Minimum Line Size - Return - in. .375 Schedule 40 Steel Pipe
Pipe Outer Diameter - in (mm) 0.675 (17.1)
Maximum Allowable Fuel Pump Suction Lift
with clean Filter - in H 20 (mH20) 31 (0.8)
Maximum Allowable Fuel Head above Fuel pump, Supply or Return - ft (m) 4.5 (1.4)
Fuel Filter Micron Size 2

Heater System Standard Optional

Engine Coolant Heater
Wattage (Nominal) 1360 1360
Voltage - AC, 1 Phase 115 (+5% -10%) 230 (+5%, -10%)
Part Number [C123640] [C123644]

Air System 2800

Combustion Air Flow - ft.³/min (m³/min) 653 (18.5)
Air Cleaner Standard Optional
Part Number [C03396] [C03327]
Type Indoor Service Only, Canister,
with Shield Single-Stage
Cleaning method Washable Disposable
Air Intake Restriction Maximum Limit
Dirty Air Cleaner - in H20 (kPa) 13 (3.2) 10 (2.5)
Clean Air Cleaner - in H 20 (kPa) 6 (1.5) 5 (1.2)
Maximum Allowable Temperature (Air To Engine Inlet) - °F (°C)[4] 130 (54.4)

Lubrication System
Oil Pressure - normal - lb/in² (kPa) 50 (345) - 95 (655)
Low Oil Pressure Alarm Switch - lb/in² (kPa) 20 (138)
In Pan Oil Temperature - °F (°C) 220 (104) - 245 (118)
Total Oil Capacity with Filter - qt (L) 21.1 (20)

Lube Oil Heater Optional Optional

Wattage (Nominal) 150 150
Voltage 120V (+5%, -10%) 240V (+5%, -10%)
Part Number C04430 C04431

Performance 2800
BMEP - lb/in² (kPa) 153 (1050)
Piston Speed - ft/min (m/min) 2333 (711)
Mechanical Noise - dB(A) @ 1m Consult Factory
Power Curve C132713
3Based on Nominal System. Back pressure flow analysis must be done to assure maximum allowable back pressure is not exceeded. (Note:
minimum exhaust Pipe diameter is based on: 15 feet of pipe, one 90° elbow, and a silencer pressure drop no greater than one half of the maximum
allowable back pressure.) 4Review for horsepower derate if ambient air entering engine exceeds 77°F (25°C). [ ] indicates component reference part
number.

Page 2 of 2
C132952 Rev F
KJK 09JAN15

Page 5 of 8
 JU4H, JU4R & JU6H, JU6R ENGINE MODELS
ENGINE MATERIALS AND CONSTRUCTION
Air Cleaner Cylinder Head
Type…………..………….. .. Indoor Usage Only Type…….. …………………Slab 2 Valve
Oiled Fabric Pleats Material……………………. Annealed Gray Iron
Material……..…..…….………Surgical Cotton
Aluminum Mesh Cylinder Liners
Type…….. …………………Centrifugal Cast, Wet Liner
Air Cleaner - Optional Material………………..….…Alloy Iron Plateau, Honed
Type…………………………. Canister
Material………………………Pleated Paper Fuel Pump
Housing………………..…… Enclosed Type…………………………Diaphragm
Drive…………………………Cam Lobe
Camshaft
Material………….………….. Cast Iron Heat Exchanger (USA) - JU4H & JU6H Only
Chill Hardened Type…………………………Tube & Shell
Location…………...….……. In Block Materials
Drive……………….………..… Gear, Spur Tube & Headers……………Copper
Type of Cam…………..….... Ground Shell…………………………Copper
Electrode……………………Zinc
Charge Air Cooler (JU6H-60,62,68,74,84, ADK0,
AD58, ADNG, ADN0, ADQ0, ADR0, AAQ8, AARG,
ADP8, ADP0, ADT0, AD88, ADR8, AD98, ADS0,
ADW8, ADX8, AD98 only)
Type……….. ..…………….Raw Water Cooled Heat Exchanger (UK) - JU4H & JU6H Only
Materials (in contact with raw water) Type…………………………Tube & Bundle
Tubes……… …………………… 90/10 CU/NI
Headers …………………… 36500 Muntz Materials
Covers …………………… 83600 Red Brass Tube & Headers……………Copper
Plumbing …………………… 316 Stainless Steel/ Brass Shell………..……………. Aluminum
90/10 Silicone
Injection Pump
Charge Air Cooler (JU6R-AA67, 59, 61, PF, Q7, RF, Type……………………….. Rotary
S9, 83 only) Drive…………………………Gear
Type…...……………………Air to Air Cooled
Materials Lubrication Cooler
Core…………………………Aluminum Type…………………………Plate

Coolant Pump Lubrication Pump

Type……….………………… Centrifugal Type…………………………Gear
Drive……………………………Poly Vee Belt Drive…………………………Gear

Coolant Thermostat Main Bearings

Type…………………………… Non Blocking Type…………………………Precision Half Shells
Qty……………………………1 Material………………………
Steel Backed-Aluminum
Lined
Cooling Loop (Galvanized)
Tees, Elbows, Pipe…………Galvanized Steel Piston
Ball Valves……………………Brass ASTM B 124, Type and Material…………Aluminum Alloy with
Solenoid Valve………………Brass Reinforced Top Ring Groove
Pressure Regulator…………Bronze Cooling………………………Oil Jet Spray
Strainer………………………Cast Iron (1/2" - 1" loops) or
Bronze (1.25" - 2" loops) Piston Pin
Type…………………………Full Floating - Offset

Cooling Loop (Sea Water) Piston Rings

Tees, Elbows, Pipe…………316 Stainless Steel Number/Piston…………… 3
Ball Valves……………………316 Stainless Steel Top………………………… Keystone Barrel Faced -
Solenoid Valve………………316 Stainless Steel Plasma Coated
Pressure Regulator/StrainerCast Brass ASTM B176 Second………………………Tapered Cast Iron
C87800 Third…………………………Double Rail Type
w/Expander Spring
Cooling Loop (316SS)
Tees, Elbows, Pipe…………316 Stainless Steel Radiator - JU4R & JU6R Only
Ball Valves……………………316 Stainless Steel Type……………………… Plate Fin
Solenoid Valve………………316 Stainless Steel Materials
Pressure Regulator/Strainer316 Stainless Steel Core……………………… Copper & Brass
Tank & Structure……….. Steel
Connecting Rod
Type…………………………… I-Beam Taper Optional
Material………………………Forged Steel Alloy Marine Coating…………… Baked Phenolic

Crank Pin Bearings Valves

Type…………………………… Precision Half Shell Type…….. …………………Poppet
Number………………………1 Pair Per Cylinder Arrangement………… ……Overhead Valve
Material………………………Wear-Guard Number/Cylinder…………… 1 intake
1 exhaust
Crankshaft Operating Mechanism……Mechanical Rocker Arm
Material………………………Forged Steel Type of Lifter…………….. Large Head
Type of Balance…………… Dynamic Valve Seat Insert……………Replaceable

Cylinder Block
Type…………………………… One Piece with
Non-Siamese Cylinders
Material………………………Annealed Gray Iron

C13615 26AUG17
Page 6 of 8
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