G3612 LE 2647-2823 bkW

Gas Petroleum (3550-3785 bhp)

Engine 1000 rpm

0.5 g/bhp-hr NOx or 0.7 g/bhp-hr NOx (NTE)

CAT ENGINE SPECIFICATIONS
V-12, 4-stroke-cycle
Bore.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 mm (11.8 in.)
Stroke.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 mm (11.8 in.)
Displacement.. . . . . . . . . . . . . . . . . . . 254 L (15,528 cu. in.)
Aspiration. . . . . . . . . . . . . . . . . . . Turbocharged-Aftercooled
Digital Engine Management
Governor and Protection.. . . . . . . Electronic (ADEM A3).
Combustion.. . . . . . . . . . . . . . . . . Low Emission (Lean Burn)
Engine Weight
net dry (approx).. . . . . . . . . . . . . . . 25,084 kg (55,300 lb)
Shown with Power Density.. . . . . . . . . . . . . . . . . . 8.9 kg/kW (14.6 lb/hp)
Optional Equipment Power per Displacement.. . . . . . . . . . . . . . . . . . . 14.9 bhp/L
Total Cooling System Capacity.. . . . . . . . 734.4 L (194 gal)
Jacket Water. . . . . . . . . . . . . . . . . . . . . . . . . 670 L (177 gal)
Aftercooler Circuit.. . . . . . . . . . . . . . . . . . . . . . 64 L (17 gal)
Lube Oil System (refill).. . . . . . . . . . . . . . . . 1030 L (272 gal)
Oil Change Interval.. . . . . . . . . . . . . . . . . . . . . . . . 5000 hours
Rotation (from flywheel end).. . . . . . . . . . Counterclockwise
Flywheel Teeth.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
FEATURES
Engine Design Gas Engine Rating Pro
- Proven reliability and durability GERP is a PC-based program designed to provide site
- Ability to burn a wide spectrum of gaseous fuels performance capabilities for Cat natural gas engines
- Robust diesel strength design prolongs life and lowers for the gas compression industry. GERP provides
owning and operating costs engine data for your sites altitude, ambient temperature,
- Broad operating speed range fuel, engine coolant heat rejection, performance data,
installation drawings, spec sheets, and pump curves.
Emissions
Meets U.S. EPA Spark Ignited Stationary NSPS Product Support Offered Through Global Cat Dealer
Emissions for 2010/11 with the use of an oxidation Network
catalyst More than 2,200 dealer outlets
Cat factory-trained dealer technicians service every
Lean Burn Engine Technology
aspect of your petroleum engine
Lean-burn engines operate with large amounts of excess
air. The excess air absorbs heat during combustion Cat parts and labor warranty
reducing the combustion temperature and pressure, Preventive maintenance agreements available for repair-
greatly reducing levels of NOx. Lean-burn design also before-failure options
provides longer component life and excellent fuel SOSSM program matches your oil and coolant samples
consumption. against Caterpillar set standards to determine:
Ease of Operation - Internal engine component condition
- High-strength pan and rails for excellent mounting and - Presence of unwanted fluids
stability - Presence of combustion by-products
- Side covers on block allow for inspection of internal - Site-specific oil change interval
components
Over 80 Years of Engine Manufacturing Experience
Advanced Digital Engine Management Over 60 years of natural gas engine production
ADEM A3 engine management system integrates speed Ownership of these manufacturing processes enables
control, air/fuel ratio control, and ignition/detonation Caterpillar to produce high quality, dependable products
controls into a complete engine management system. - Cast engine blocks, heads, cylinder liners, and flywheel
ADEM A3 has improved: user interface, display system, housings
shutdown controls, and system diagnostics.
- Machine critical components
Full Range of Attachments - Assemble complete engine
Large variety of factory-installed engine attachments
Web Site
reduces packaging time.
For all your petroleum power requirements, visit
Testing www.catoilandgas.cat.com.
Every engine is full-load tested to ensure proper engine
performance.

LEHW0041-02 Page 1 of 4
Supersedes LEHW0814-05
 G3612 LE GAS PETROLEUM ENGINE
2647-2823 bkW (3550-3785 bhp)

STANDARD EQUIPMENT
Air Inlet System Ignition System
Air cleaner standard duty A3 control system senses individual cylinder
Inlet air adapter detonation and controls individual cylinder timing
Control System Instrumentation
A3 control system provides electronic governing LCD display panel monitors engine parameters and
integrated with air/fuel ratio control and individual displays diagnostic codes
cylinder ignition timing control
Lube System
Cooling System Crankcase breathers top mounted
Jacket water pump Oil cooler
Jacket water thermostats and housing Oil filter
Aftercooler pump Oil pan drain valve
Aftercooler water thermostats and housing
Mounting System
Single-stage aftercooler
Engine mounting feet (six total)
Exhaust System
Protection System
Dry wrapped exhaust manifolds
Electronic shutoff system with purge cycle
Vertical outlet adapter
Crankcase explosion relief valves
Flywheel & Flywheel Housing Gas shutoff valve
SAE standard rotation
Starting System
Fuel System Air starting system
Gas admission valves electronically controlled fuel
General
supply pressure
Paint Cat yellow
Vibration dampers

OPTIONAL EQUIPMENT
Air Inlet System Instrumentation
Heavy-duty air cleaner with precleaners Remote data monitoring and speed control
Heavy-duty air cleaner with rain protection Compatible with Cat Electronic Technician (ET) and
Data View
Charging System
Communication Device PL1000T/E
Charging alternators
Display panel deletion is optional
Control System
Lube System
Custom control system software available for non-
Air or electric motor-driven prelube
standard ratings, field programmable using flash
Duplex oil filter
memory
LH or RH service
Cooling System Lube oil makeup system
Expansion tank
Mounting System
Flexible connections
Mounting plates (set of six)
Jacket water heater
Power Take-Offs
Exhaust System
Front stub shafts
Flexible bellows adapters
Exhaust expander Starting System
Weld flanges Air pressure reducing valve
Natural gas starting system
Fuel System
Fuel filter General
Gas pressure regulator Engine barring device
Flexible connection Damper guard
Low energy fuel system
Corrosive gas fuel system
Ignition System
CSA certification

LEHW0041-02 Page 2 of 4
Supersedes LEHW0814-05
 G3612 LE GAS PETROLEUM ENGINE
2647-2823 bkW (3550-3785 bhp)

technical data
G3612 LE Gas Petroleum Engine 1000 rpm

DM5134-03 DM5309-06 DM5310-06 DM8607-02

Engine Power
@ 100% Load bkW (bhp) 2733 (3665) 2823 (3785) 2647 (3550) 2647 (3550)
@ 75% Load bkW (bhp) 2049 (2749) 2117 (2839) 1985 (2663) 1985 (2663)

Engine Speed rpm 1000 1000 1000 1000

Max Altitude @ Rated
Torque and 38C (100F) m (ft) 1219.2 (4000) 1219.2 (4000) 609.6 (2000) 304.8 (1000)
Speed Turndown @ Max
Altitude, Rated Torque,
and 38C (100F) % 21 20 23 23

SCAC Temperature C (F) 43 (110) 32 (90) 55 (130) 55 (130)

Emissions*
NOx g/bkW-hr (g/bhp-hr) 0.94 (0.7) 0.94 (0.7) 0.94 (0.7) 0.67 (0.5)
CO g/bkW-hr (g/bhp-hr) 3.4 (2.5) 3.4 (2.5) 3.4 (2.5) 3.7 (2.75)
CO2 g/bkW-hr (g/bhp-hr) 587 (438) 585 (436) 589 (439) 591 (441)
VOC** g/bkW-hr (g/bhp-hr) 0.79 (0.59) 0.75 (0.56) 0.82 (0.61) 0.87 (0.65)

Fuel Consumption***
@ 100% Load MJ/bkW-hr (Btu/bhp-hr) 9.31 (6580) 9.28 (6561) 9.34 (6600) 9.38 (6629)
@ 75% Load MJ/bkW-hr (Btu/bhp-hr) 9.7 (6856) 9.66 (6829) 9.74 (6883) 9.78 (6914)

Heat Balance
Heat Rejection to
Jacket Water
@ 100% Load bkW (Btu/min) 656 (37,336) 677 (38,539) 639 (36,379) 638 (36,338)
@ 75% Load bkW (Btu/min) 576 (32,714) 594 (33,755) 546 (31,052) 548 (31,179)
Heat Rejection to
Aftercooler
@ 100% Load bkW (Btu/min) 515 (29,299) 563 (32,045) 468 (26,661) 488 (27,783)
@ 75% Load bkW (Btu/min) 281 (15,954) 310 (17,616) 252 (14,361) 264 (15,016)
Heat Rejection to
Exhaust
@ 100% Load bkW (Btu/min) 2705 (153,813) 2743 (156,017) 2664 (151,486) 2673 (152,035)
@ 75% Load bkW (Btu/min) 2152 (122,365) 2184 (124,184) 2132 (121,263) 2141 (121,731)

Exhaust System
Exhaust Gas Flow Rate
@ 100% Load Nm3/bkW-hr (cfm) 690.14 (24,372) 705.85 (24,927) 674.20 (23,809) 682.15 (24,090)
@ 75% Load Nm3/bkW-hr (cfm) 543.32 (19,187) 553.65 (19,552) 532.67 (18,811) 538.95 (19,033)
Exhaust Stack
Temperature
@ 100% Load C (F) 453.30 (848) 448 (838) 459 (858) 448 (838)
@ 75% Load C (F) 472.20 (882) 464 (867) 480 (896) 469 (876)

Intake System
Air Inlet Flow Rate
@ 100% Load Nm3/bkW-hr (scfm) 265.78 (9386) 273.91 (9673) 257.66 (9099) 264.99 (9358)
@ 75% Load Nm3/bkW-hr (scfm) 203.85 (7199) 210.00 (7416) 197.71 (6982) 203.34 (7181)

Gas Pressure kPag (psig) 295-324 (42.8-47) 295-324 (42.8-47) 295-324 (42.8-47) 295-324 (42.8-47)

*at 100% load and speed, all values are listed as not to exceed
**Volatile organic compounds as defined in U.S. EPA 40 CFR 60, subpart JJJJ
***ISO 3046/1
LEHW0041-02 Page 3 of 4
Supersedes LEHW0814-05
 G3612 LE GAS PETROLEUM ENGINE
2647-2823 bkW (3550-3785 bhp)

gas PETROLEUM engine

4735.1 2379.5
(186.42) (93.68)

3219.9
(126.77)

dimensions Note: G
 eneral configuration not to be used for
installation. See general dimension drawings
Length mm (in) 4735.1 (186.42)
for detail.
Width mm (in) 2379.5 (93.68)
Height mm (in) 3219.9 (126.77)
Shipping Weight kg (lb) 25,084 (55,300)

rating definitions and Conditions

Engine performance is obtained in accordance with SAE Conditions: Power for gas engines is based on fuel
J1995, ISO3046/1, BS5514/1, and DIN6271/1 standards. having an LHV of 33.74 kJ/L (905 Btu/cu ft) at 101 kPa
(29.91 in. Hg) and 15 C (59 F). Fuel rate is based on a
Transient response data is acquired from an engine/ cubic meter at 100 kPa (29.61 in. Hg) and 15.6 C
generator combination at normal operating temperature (60.1 F). Air flow is based on a cubic foot at 100
and in accordance with ISO3046/1 standard ambient kPa (29.61 in. Hg) and 25 C (77 F). Exhaust flow is
conditions. Also in accordance with SAE J1995, based on a cubic foot at 100 kPa (29.61 in g) and stack
BS5514/1, and DIN6271/1 standard reference temperature.
conditions.

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, SOS, ADEM, 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.

Performance Numbers: DM5134-03, DM5309-06, DM5310-06, DM8607-02 2010 Caterpillar

LEHW0041-02 (8-10) All rights reserved.
Supersedes LEHW0814-05