DIMENSIONS
CATERPILLAR
®
ENGINE SPECIFICATIONS
In-line 6-Cylinder, 4-Stroke-Cycle Diesel
Bore — in (mm) .................... 4.41 (112)
Stroke — in (mm) .................. 5.87 (149)
Displacement — cu in (L) ............. 537 (8.8)
Aspiration ..................... Turbocharged
Compression Ratio ..................... 17.0:1
Rotation (from flywheel end) . . Counterclockwise
Cooling System
1
— gal (L) ............ 4.8 (18)
Lube Oil System (refill) — gal (L) ....... 8.5 (32)
Weight, Net Dry (approx) — lb (kg)
with standard equipment ......... 1500 (680)
1
Engine only. Capacity will vary with radiator size and use of cab heater.
STANDARD EQUIPMENT
Air inlet manifold heater
Cooling: belt-driven water pump, oil cooler
Crankcase breather
Diesel Oxidation Catalyst (required for EPA 2004
certification)
Electronic Control Module (ECM)
Electronic Data Link, SAE/ATA, SAE J1939
Fuel: spin-on secondary filter, transfer pump
Governor: full-range, electronically controlled
HEUI™ Fuel System
Lifting eyes
Lubrication: gear-driven pump, front or rear
sump pan, full flow spin-on filter, oil filler, oil
level gauge (dipstick)
SAE No. 1 flywheel housing
Turbocharger
Vibration damper
ACCESSORY EQUIPMENT
Air compressor: 15.7 cfm with drive through
capability
Air conditioner compressor mounting
Air inlet elbow
Automatic transmission adapter
Auxiliary brake compatible (exhaust)
Fan drive mounting bracket
Flywheel
Front engine support
Front PTO adapter
Fuel priming pump
Hydraulic pump drive, SAE A
Jacket water heater
Rear PTO (RPTO)
Starting motor: 12V or 24V
Turbocharger compressor outlet elbow
LEHT8891-00 Page 1 of 3
Shown with
Optional Equipment
35.2 in
(894.08 mm)
49.0 in
(1245 mm)
42.1 in
(1070 mm)
42.1 in
(1070 mm)
On-Highway
Diesel Engine
with ACERT
®
Technology
C9
335-350 hp @ 2100 rpm
1050-1100 lb-ft @
1400 rpm Peak Torque
LEHT8891-00 Page 2 of 3
C9
ON-HIGHWAY DIESEL ENGINE — 335 to 350 hp
PERFORMANCE DATA
1
Operating Range (rpm) ............. 1400-2100
Governed Speed — rpm ................. 2100
Advertised hp (kW) .................. 335 (250)
Max hp (kW) ........................ 350 (261)
Peak Torque — lb-ft (N•m) ......... 1050 (1428 )
Peak Torque — rpm ...................... 1400
Torque rise (%) ............................ 25
Altitude Capability — ft (m) ....... 10,000 (3048)
Operating Range (rpm) ............. 1400-2100
Governed Speed — rpm ................. 2100
Advertised hp (kW) .................. 350 (261)
Max hp (kW) ........................ 350 (261)
Peak Torque — lb-ft (N•m) ......... 1100 (1496)
Peak Torque — rpm ..................... 1400
Torque rise (%) ............................ 26
Altitude Capability — ft (m) ....... 10,000 (3048)
1400 1200 1600 1800 2000 2200
Engine Speed rpm
335 hp (250 kW)
150
200
Torque
lb-ft
Power
bhp
550
650
950
1050
1150
1250
750
850
350
250
300
PERFORMANCE CURVES
1400 1200 1600 1800 2000 2200
Engine Speed rpm
350 hp (261 kW)
150
200
Torque
lb-ft
Power
bhp
550
650
950
1050
1150
1250
750
850
350
250
300
1
When specing with automatic transmission the engine has overrun capabilities to 2300 rpm.
C9
ON-HIGHWAY DIESEL ENGINE — 335 to 350 hp
Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
CAT, CATERPILLAR, their respective logos, ACERT, “Caterpillar Yellow” and the POWER EDGE trade dress, as well as
corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.
TMI Reference No.: DM7264-00, DM7266-00, DM7267-00, DM7268-00, DM7269-00, DM7270-00, DM7271-00, DM7272-00, DM7275-00, DM7276-00,
DM7279-00, DM7285-00
LEHT8891-00 (8-08) ©2008 Caterpillar
All rights reserved.
P erformance is based on SAE J1995 standard
conditions of 29.61 in. Hg (100 kPa) and 77° F
(25° C).
The curves shown are for a standard engine
without fan, but equipped with air compressor
and fuel, lubricating oil, and water pumps.
RATING DEFINITIONS AND CONDITIONS
GEARING CONSIDERATIONS
The C9 On-Highway Diesel Engine offers a
wide operating range and high torque rise,
which promotes the use of transmissions with
fewer gears. Even with this built-in feature,
heavy/specialty haulers must remember their
trucks should be geared to achieve the
appropriate compromise between startability
and desired road speed. The general principal
drivers should follow is that of the “gear fast,
run slow” strategy to achieve optimal
performance.
For the best balance of performance and fuel
economy, spec axle ratios and tire sizes
according to the following:
• 60,000 lb GCW or less
1650 rpm @ 65 mph (105 km/h)
The minimum startability requirements are 10%
for pick-up and delivery, 14% for linehaul, 20%
for on/off highway, and 25% for off-highway. At
peak torque rpm in top gear, the recommended
gradeability is 1.8% (1.5% minimum). At cruise
speed in top gear, 1.0% is the ideal gradeability.
To optimize your truck’s performance
characteristics, a computerized spec’ing tool
called Design Pro is offered by your Caterpillar
dealer. It calculates effects of various driveline
variables on engine operation such as
transmissions, axles, and tires. This analysis
allows you to verify that your truck’s driveline
specifications are best suited to your
application.
ELECTRONIC FEATURES
■
Real time clock with date and time
stamping of critical events
■
Electronic self-diagnostics
■
Compatible with Caterpillar Electronic
Technician (ET)
■
Cold weather startup strategy and
electronic idle control functions
■
ECM storage of operational, maintenance,
diagnostic codes and diagnostic data
■
J1939 compatible
■
Customer selectable, re-programmable
operational parameters:
- 2-speed fast idle capabilities
- Adjustable low idle rpm
- Automated Transmission compatibility
- Cooling fan control
- Cruise control with exclusive Soft Cruise
- Customer password protection
- Engine Monitoring System — warning,
derate, or shutdown
- Enhanced theft deterrent and secure idle
(Cat Messenger or Pocket Tec required)
- Exhaust brake operational modes
- Fleet Information Software capability
- Idle shutdown timer & override
- Maintenance monitor [miles (km) or
hours]
- OEM parameter lockout
- Progressive shifting and gear down
protection
- Selectable AT/MT/HT shift points for
automatic transmission
- Vehicle speed [mph (km/h)] limiting and
protection
■
Programmable Power Take-Off (PTO)
functions:
- Adjustable maximum engine rpm speed
- Adjustable minimum engine rpm speed
- Adjustable ramp rate up or down
between PTO set speed(s)
- Adjustable rpm “bump” intervals
- Adjustable speed control [mph (km/h)] of
vehicle while in PTO mode
- Limit engine torque to driven equipment
- Multi-speed PTO set speed capability
- Selectable PTO configuration for “in cab”
or station of remote operation
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