This document provides specifications for a Caterpillar C13 fire truck diesel engine with a power output range of 485-525 hp. The engine uses ACERT technology and meets EPA 07 emissions standards. It has a displacement of 763 cubic inches from its inline 6-cylinder design. The engine requires the use of ultra-low sulfur diesel fuel and CAT ECF-3 specification oil. The document outlines the engine's dimensions, performance data, and optional equipment available.

1. C13
Fire Truck
Diesel Engine EPA 07 Certified
with ACERT® 485-525 hp @ 2100 rpm
1650-1750 lb-ft @
Technology 1200 rpm Peak Torque
CATERPILLAR® ENGINE SPECIFICATIONS
In-line 6-Cylinder, 4-Stroke-Cycle Diesel
Bore — in (mm) . . . . . . . . . . . . . . . . . . . . 5.12 (130)
Stroke — in (mm) . . . . . . . . . . . . . . . . . . 6.18 (157)
Displacement — cu in (L) . . . . . . . . . . . 763 (12.5)
Combustion/Aspiration. . . Series Turbocharged
Compression Ratio . . . . . . . . . . . . . . . . . . . . . 18.0:1
Rotation (from flywheel end) . . Counterclockwise
Cooling System 1 — gal (L). . . . . . . . . . 3.04 (11.5)
Lube Oil System (refill) — gal (L) . . . . . . . 10 (38)
Weight, Net Dry (approx) — lb (kg)
with standard equipment . . . . . . . . 2610 (1184)
Shown with 1
Engine only. Capacity will vary with radiator size and use of cab heater.
Optional Equipment
STANDARD EQUIPMENT ACCESSORY EQUIPMENT
Caterpillar Regeneration System
®
Air compressor: 16.1 cfm (0.46 m3/min) or
Cooling: gear-driven water pump, oil cooler 31.7 cfm (0.9 m3/min)
Diesel particulate filter Air inlet elbow
Electronic Control Module (ECM) Air inlet shut off
Electronic Data Link, SAE/ATA, SAE/J1939 Alternator (12 Volt-115 Amp)
Electronically Controlled Unit Injection Fuel Automatic transmission adapter
System Cat compression brake
Fuel: spin-on secondary filter, transfer pump Exhaust couplings
Gear-driven water pump Fan drive mounting bracket
Governor: full-range, electronically controlled Flywheel
Hydraulic steering pump drive, SAE A Front engine support
Lifting eyes Front PTO adapter
Lubrication: gear-driven pump, front or rear Fuel priming pump
sump pan, full flow spin-on filter, oil filler, Lubricating oil filter, bypass spin on
oil level gauge (dipstick) Optional secondary auxiliary oil filter
Open crankcase ventilation Optional turbocharger mounting locations
Pad mount air conditioner compressor Primary fuel filter (10 micron)
Pad mount alternator Rear PTO (RPTO)
SAE No. 1 Flywheel Housing Starting motor: 12V or 24V
Series-turbochargers Turbocharger compressor outlet elbow
Vibration damper
DIMENSIONS
43.1 in.
1094 mm
29.7 in.
755 mm
18.2 in.
463 mm
50.4 in.
1279 mm
LEHT4571-05 Page 1 of 4

2. C13 FIRE TRUCK DIESEL ENGINE — 485 to 525 hp
PERFORMANCE CURVES
525 hp (391 kW)
485 hp (362 kW)
1750
1750
1600
1600
1450
Torque
1450
Torque
lb-ft
lb-ft
1300
1300
1150
1150
1000
1000
850
850
500
500
450
450
Power
Power
400
bhp
400
bhp
350
350
300
300
250
250
1100 1300 1500 1700 1900 2100
900
1100 1300 1500 1700 1900 2100
900
Engine Speed rpm
Engine Speed rpm
PERFORMANCE DATA
Operating Range (rpm) . . . . . . . . . . . . . 1200–2100 Operating Range (rpm) . . . . . . . . . . . . . 1200–2100
Governed Speed — rpm . . . . . . . . . . . . . . . . . . 2100 Governed Speed — rpm . . . . . . . . . . . . . . . . . . 2100
Advertised hp (kW) . . . . . . . . . . . . . . . . . . 485 (362) Advertised hp (kW) . . . . . . . . . . . . . . . . . . 525 (391)
Max hp (kW) . . . . . . . . . . . . . . . . . . . . . . . . 485 (362) Max hp (kW) . . . . . . . . . . . . . . . . . . . . . . . . 525 (391)
Peak Torque — lb-ft (N•m) . . . . . . . . . 1650 (2237) Peak Torque — lb-ft (N•m) . . . . . . . . . 1750 (2373)
Peak Torque — rpm . . . . . . . . . . . . . . . . . . . . . 1200 Peak Torque — rpm . . . . . . . . . . . . . . . . . . . . . 1200
Torque rise (%) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Torque rise (%) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Altitude Capability — ft (m). . . . . . . 10,000 (3048) Altitude Capability — ft (m). . . . . . . 10,000 (3048)
LEHT4571-05 Page 2 of 4

3. C13 FIRE TRUCK DIESEL ENGINE — 485 to 525 hp
FUEL AND LUBE OIL REQUIREMENTS
GEARING CONSIDERATIONS
FUEL
The C13 Fire Truck Diesel Engine offers a
Model year 2007 and newer Caterpillar on-
wide operating range and high torque rise,
highway diesel engines require the use of ULSD
which promotes the use of transmissions with
fuel in order to meet the United States (U.S.)
fewer gears. Even with this built-in feature,
Environmental Protection Agency (EPA) 2007
heavy/specialty haulers must remember their
emissions regulations for on-highway diesel
trucks should be geared to achieve the
engines. Failure to use ULSD in these engines is
appropriate compromise between startability
punishable with civil penalties.
and desired road speed. The general principal
drivers should follow is that of the “gear fast,
Ultra Low Sulfur Diesel (ULSD) fuel will
run slow” strategy to achieve optimal
have ≤ 15 ppm (0.0015%) sulfur using the
performance.
ASTM D5453, ASTM D2622, or DIN 51400
For the best balance of performance and fuel test methods.
economy, spec axle ratios and tire sizes
according to the following: CRANKCASE LUBE OIL
Diesel engine oils meeting the Cat ECF-3
• 80,000 lb GCW or less
(Engine Crankcase Fluid-3) specification are
1400 rpm @ 65 mph (105 km/h)
strongly recommended for use in 2007 model
Maximum recommended engine speed at
year and newer Caterpillar on-highway diesel
cruise is 1500 rpm.
engines. The Cat ECF-3 specification was
The recommended startability requirements are developed in order to protect emissions control
14% (10% minimum) for on-highway; 20% for systems, help comply with the emissions
on/off highway, and 25% for off-highway. At standards, reduce engine wear, and control
peak torque rpm in top gear, the recommended piston deposits and oil consumption in 2007
gradeability is 1.8% (1.5% minimum). At cruise model year and newer on-highway diesel
speed in top gear, 1.0% is the ideal gradeability. engines that are designed to use fuels with ≤ 15
ppm (0.0015%) sulfur.
To optimize your Fire Truck’s performance
characteristics, a computerized spec’ing tool The combination of ULSD fuel and API CJ-4
called Design Pro is offered by your Caterpillar compliant diesel engine oil is strongly
dealer. It calculates effects of various driveline recommended for optimum engine system
variables on engine operation such as performance.
transmissions, axles, and tires. This analysis
Note: Oils that meet the API CJ-4 oil category
allows you to verify that your Fire Truck’s
requirements are Cat ECF-3 compliant.
driveline specifications are best suited to your
application.
LEHT4571-05 Page 3 of 4

4. C13 FIRE TRUCK DIESEL ENGINE — 485 to 525 hp
s Customer selectable, re-programmable s Battery backup
operational parameters: s Quick stop recorder
- Adjustable low idle rpm s Compatible with Caterpillar Electronic
- Automated transmission compatibility Technician (ET)
- Cooling fan control s Cold weather startup strategy and
- Cruise control with exclusive Soft Cruise electronic idle control functions
- Customer password protection s ECM storage of operational, maintenance,
diagnostic codes and diagnostic data
- Engine Monitoring System — warning,
derate, or shutdown s J1939 compatible
- Enhanced theft deterrent and secure idle s Programmable Power Take-Off (PTO)
(Cat Messenger) functions:
- Fleet Information Software capability - Adjustable maximum engine rpm speed
- Idle shutdown timer & override - Adjustable minimum engine rpm speed
- Maintenance monitor [miles (km) or hours] - Adjustable ramp rate up or down between
- OEM parameter lockout PTO set speed(s)
- Progressive shifting and gear down - Adjustable rpm “bump” intervals
protection - Adjustable speed control [mph (km/h)] of
- Vehicle speed [mph (km/h)] limiting and vehicle while in PTO mode
protection - Limit engine torque to driven equipment
s Real time clock with date and time - Multi-speed PTO set speed capability
stamping of critical events
- Kick-out vehicle speed limit
s Electronic self-diagnostics
- Selectable PTO configuration for “in cab”
s Electronically tabulated total fuel or station of remote operation
consumption, hours, idle time, and miles
RATING DEFINITIONS AND CONDITIONS
Performance is based on SAE J1995 standard The curves shown are for a standard engine
conditions of 29.61 in. Hg (100 kPa) and 77° F without fan, but equipped with air compressor
(25° C). and fuel, lubricating oil, and water pumps.
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.
LEHT4571-05 (11-06) ©2006 Caterpillar
All rights reserved.