HomeCaterpillarCaterpillar SR4B

Caterpillar SR4B Generator Set

The Caterpillar SR4B is a 800 kW (1000 kVA) Natural Gas standby generator set powered by a Caterpillar 3412C TA V-12 engine. It is available at 480 V and 277 V, 3-phase, 60 Hz and rated 2405.6 A. It holds about 29 L (7.7 gal) of oil and 57 L (15.1 gal) of coolant, with a maximum ambient rating of 40 °C. Starting uses 2 batteries rated 950 CCA. The set measures 9144×2438×2896 mm (360.0×96.0×114.0 in), weighs about 5413 kg (11934 lb) and produces 74.72 dBA at 15 m. An integrated tank holds 4730 L (1249.5 gal), roughly 23.5 hours of runtime.

800 kW
Standby
27.02 L
Displacement
29.0 L
Oil capacity
2
Document types

How to read your Caterpillar serial & model number →

Specifications

FuelNatural Gas
Frequency60.0 Hz
Standby power800 kW
Standby kVA1000
Prime power648 kW
EmissionsEPA Tier 2
ControllerEMCP 3.1, EMCP 3.2, EMCP 3.3, EMCP Il, EMCP3, EMCPII+, Electronic ADEM II, Exclusive Caterpillar Voltage Regulator, VR3 automatic voltage regulator
Oil capacity29.0 L
AlternatorCaterpillar SR4B
Voltage options480 V, 277 V
Phase3
Rated current2405.6 A
Power factor0.8
Circuit breaker1600 A
Battery cranking950 CCA
Battery quantity2
Coolant capacity57.0 L
Max ambient40 °C
Dimensions (L×W×H)9144×2438×2896 mm
Dry weight5413 kg
Sound level70.0 dBA @ 15 m
Fuel tank4732.0 L
Tank runtime[23.5] hr

Engine

Caterpillar 3412C TA V-12
Oil capacity139.0 L
Coolant capacity59.0 L
Displacement27.02 L
AspirationTA
Rated speed1500 rpm

Maintenance & consumables

for the Caterpillar 3412C TA V-12
ItemSpecCapacityPart #Interval
Air filter6125063650 hr PartsGeek
Fuel filterFuel System Primary Filter - Clean/Inspect/Replace38904331250 hr PartsGeek
Fuel filterFuel filter30000 hr find
Fuel filterSecondary Filter1R0763250 hr PartsGeek atldiesel $12.53
Oil filter38904341250 hr PartsGeek
Belt1250 hr find
Coolant160.0 L18000 hr
Oil470.0 L30000 hr

Common questions

What is the power rating of the Caterpillar SR4B?

The Caterpillar SR4B is rated 800 kW standby (1000.0 kVA).

What engine does the Caterpillar SR4B use?

The Caterpillar SR4B is powered by the Caterpillar 3412C TA V-12 engine.

What fuel does the Caterpillar SR4B use?

The Caterpillar SR4B runs on Natural Gas.

What is the oil capacity of the Caterpillar SR4B?

The Caterpillar 3412C TA V-12 engine in the Caterpillar SR4B has an oil capacity of 139.0 liters.

What alternator does the Caterpillar SR4B use?

The Caterpillar SR4B uses a Caterpillar SR4B alternator.

Troubleshooting

17

Fault codes

CodeMeaning
g00604607The fault alarm indicator (3) flashes when the GSC detects an alarm fault.
2301A ControlWhen the engine oil pressure is increased beyond the low oil pressure setpoint, the GSC will inform the governor that the engine speed should be increased from IDLE to RATED rpm.
21Fault shutdown
22Fault alarm

Symptoms & remedies

SymptomCauseRemedy
Low oil pressure indicator flashes, and the engine is shut down.The engine oil pressure drops below the setpoints for low oil pressure shutdown that are programmed into the GSC. There are two low oil pressure setpoints. One setpoint is used when the engine is at idle speed. The other setpoint is used when the engine is at rated speed.
Emergency stop indicator flashes, and the engine is shut down.The operator presses the emergency stop push button (ESPB) on the front panel.
High water temperature indicator flashes, and the engine is shut down.The engine coolant temperature rises above the setpoint for high water temperature shutdown that is programmed into the GSC.
Engine overspeed indicator flashes, and the engine is shut down.The engine speed exceeds a certain threshold set in the GSC+.Correct the condition by addressing any issues that caused the engine to overspeed.
Engine overcrank indicator flashes, and the engine is shut down.The engine has been cranked for an extended period without starting.Correct the condition by ensuring proper start-up procedures are followed.
The GSC+ detects an alarm faultFault alarm indicator (26) is accompanied by an alarm fault code that is shown on the upper display (29) when the alarm codes key (30) is pressed.
The GSC+ detects a shutdown faultThe engine will shut down if the engine is running. The engine will not be allowed to start.
Generator parameters are not matched to the busIf the generator and bus voltages, frequencies and phases are in sync, the lamps will light continuously. If not, the associated lamp will flash.
Low oil pressureEngine oil pressure drops below the setpoints for low oil pressure shutdown that are programmed into the GSC+.The tow oil pressure indicator FLASHES, and the engine is shut down. The engine is not allowed to start until the fault is corrected.
Emergency stop conditionOperator presses the Emergency Stop Push Button (ESPB) on the front panel.The emergency stop indicator FLASHES and the engine is shut down. The engine is not allowed to start until the condition is corrected.
High water temperatureEngine coolant temperature rises above the setpoint for high water temperature shutdown that is programmed into the GSC+.The engine is shutdown and the engine is not allowed to start until the fault is corrected.
Engine overspeedEngine speed exceeds the setpoint for engine overspeed that is programmed into the GSC+.The engine is shutdown and the engine is not allowed to start until the fault is corrected.
OvercrankEngine does not start within the setpoint for overcrank.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

116
Part #DescriptionQtySystem
101564109Air ShutoffAir filter PartsGeek
10R9951Head Gaskets1Gasket PartsGeek
113-8432Front Seal1Seal PartsGeek
1440725Connecting rodsConnecting rod PartsGeek
1744947Aftercooler and Lines Gaskets1Gasket PartsGeek
1R-0749High Efficiency Fuel FilterFuel filter Amazon eBay $57.96 PartsGeek
1R-0750High Efficiency Fuel FilterFuel filter PartsGeek atldiesel $12.53
1R-0751High Efficiency Fuel FilterFuel filter Amazon eBay $40.00 PartsGeek
1R-0755High Efficiency Fuel FilterFuel filter PartsGeek kuduparts $54.00
1R-0756High Efficiency Fuel FilterFuel filter PartsGeek ddtp $24.00
1R-0766High Efficiency Fuel FilterFuel filter PartsGeek kuduparts $41.00
1R-1725Part 1R-1725Filter PartsGeek
200-4139axial seal filter(axial seal)Filter PartsGeek
206-5756Part 206-5756KitKit PartsGeek
225-6404radial seal filter(radial seal)Filter PartsGeek
2322507Manifold Gaskets1Gasket PartsGeek
2322521Turbocharger Gaskets1Gasket PartsGeek
2322522Reman Injectors1Injector PartsGeek
2342795Injector Seals/Gaskets1Gasket PartsGeek
245-5829Coolant Battery Tester Refractometer1Sensor PartsGeek
5N-5561Silicone Lubricant1Fluid PartsGeek
ESD5526Speed ControllerSpeed controller PartsGeek
M-4660684Gasket Set - Central & Lower - 3508Gasket set PartsGeek
PK48000M4 tonne Palfinger PK48000M hydraulic crane1Crane PartsGeek
R134aAir conditioner50Air filter PartsGeek ironwing $85.00
RE508202FUEL FILTER1Fuel filter eBay $25.00 PartsGeek
RE527961FUEL FILTERFuel filter PartsGeek FridayParts $899.99
RE60021PRIMARY FUEL FILTERFuel filter eBay $45.00 PartsGeek
g00604696Alarm Module (If Equipped)Alarm module PartsGeek
g00630590Phase Rotation Meter (Using Three Light Bulbs)Phase rotation meter PartsGeek
g00633434Synchronizing Lights ModuleSynchronizing lights module PartsGeek
g00780729Illustration 1(1) Valve cover(2) Hydraulic PumpPump PartsGeek
i01490119Space Heater - CheckSpace heater PartsGeek
i01490278Electronic Modular Control Panel II+ (EMCP II+)Control panel PartsGeek
01908191OverspeedService part / kit PartsGeek
101147116Engine Operation with Active Diagnostic CodesService part / kit PartsGeek
101154196Engine Operation with Intermittent Diagnostic CodesService part / kit PartsGeek
101233590Before Starting EngineService part / kit PartsGeek
101446865Diagnostic LampService part / kit PartsGeek
101646248After Starting EngineService part / kit PartsGeek
102308903Starting with Jump Start CablesService part / kit PartsGeek
102327037Starting the Engine (EMCP II and EMCP II+ (If Equipped))Service part / kit PartsGeek
102512380Fault LoggingService part / kit PartsGeek
128-6786Crankshaft Bare1Service part / kit PartsGeek
130-3786Control Panel1Service part / kit PartsGeek
1743191Reman Cylinder Heads1Service part / kit PartsGeek
249-0437Oxidation Catalyst Assembly - RoundService part / kit PartsGeek
256-0330Oxidation Catalyst Assembly - RoundService part / kit PartsGeek
301108737Cold Weather StartingService part / kit PartsGeek
888-983-7847[No description provided]1Service part / kit PartsGeek
8889837647LOCK-RETAINER 5 weirService part / kit PartsGeek
AEHQ5296-0110-99Service part / kit PartsGeek
AEHQ5614-01623G Wheel Tractor ScraperService part / kit PartsGeek
AEHQ5628-02826H Landfill CompactorService part / kit PartsGeek
PEHJ0271Cat® Emissions Upgrade Kits for Select 3500 Marine EnginesService part / kit PartsGeek
PEHJ0287Cat® Performance Upgrade Kits for Select 3508, 3512, and 3516 Marine EnginesService part / kit PartsGeek
XQ1750power moduleService part / kit PartsGeek
g00104545Illustration 6Service part / kit PartsGeek
g00305862Emergency Stop Warning LabelService part / kit PartsGeek
g00306263Operation Warning LabelService part / kit PartsGeek
g00572840Illustration 9Service part / kit PartsGeek
g00601027Serial PlateService part / kit PartsGeek
g00604607tdown fuel system.Service part / kit PartsGeek
g00609958Illustration 3Service part / kit PartsGeek
g00610186Illustration 17Service part / kit PartsGeek
g00610236Illustration 18Service part / kit PartsGeek
g00611596Illustration 14Service part / kit PartsGeek
g00611770Illustration 7Service part / kit PartsGeek
g00611772Illustration 2Service part / kit PartsGeek
g00611832Illustration 4Service part / kit PartsGeek
g00611839Illustration 5Service part / kit PartsGeek
g00611845Illustration 6Service part / kit PartsGeek
g00611851Illustration 7Service part / kit PartsGeek
g00611856Illustration 8Service part / kit PartsGeek
g00611866Illustration 11Service part / kit PartsGeek
g00611892Illustration 12Service part / kit PartsGeek
g00611914Illustration 13Service part / kit PartsGeek
g00611951Illustration 14Service part / kit PartsGeek
g00611956Illustration 15Service part / kit PartsGeek
g00611961Illustration 16Service part / kit PartsGeek
g00611973Illustration 19Service part / kit PartsGeek
g00625906Illustration 8Service part / kit PartsGeek
g00626058Illustration 9Service part / kit PartsGeek
g00627416Illustration 31Service part / kit PartsGeek
g00704000Fire Prevention and Explosion PreventionService part / kit PartsGeek
g00771448Electrical System - Grounding PracticesService part / kit PartsGeek
g01063102Caterpillar Messenger DisplayService part / kit PartsGeek
g01129459Illustration 18 (1) Serial Number PlateService part / kit PartsGeek
g01129463Illustration 19 (2) Information PlateService part / kit PartsGeek
i00910470Engine StartingService part / kit PartsGeek
i00911989Before Starting EngineService part / kit PartsGeek
i01108098Cold Start StrategyService part / kit PartsGeek
i01152388General InformationService part / kit PartsGeek
i01152505Component DescriptionsService part / kit PartsGeek
i01359666Crushing Prevention and Cutting PreventionService part / kit PartsGeek
i01372247Mounting and DismountingService part / kit PartsGeek
i01372254OilsService part / kit PartsGeek
i01463253Diagnostic LampService part / kit PartsGeek
i01489427Generator DescriptionService part / kit PartsGeek
i01489623Safety Signs and Labels - Electrical Distribution (Generator)Service part / kit PartsGeek
i01489943Engine StoppingService part / kit PartsGeek
i01489957Electrical SystemService part / kit PartsGeek
i01489970Generator Isolating for MaintenanceService part / kit PartsGeek
i01490002Reference NumbersService part / kit PartsGeek
i01490046Voltage ConnectionsService part / kit PartsGeek
i01563743Engine ElectronicsService part / kit PartsGeek
i01563934Self-DiagnosticsService part / kit PartsGeek
i01658146Important Safety InformationService part / kit PartsGeek
i01909882Engine Speed GoverningService part / kit PartsGeek
i02238548Diagnostic Flash Code RetrievalService part / kit PartsGeek
i02240570Plate Locations and Film LocationsService part / kit PartsGeek
i02246834Safety MessagesService part / kit PartsGeek
i02276735Welding on Engines with Electronic ControlsService part / kit PartsGeek
i02469632Engine StoppingService part / kit PartsGeek
i02472408Monitoring System (If Equipped)Service part / kit PartsGeek
i07966018Important Safety Information1-UPService part / kit PartsGeek

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime
Prime50%136.536.1
Prime75%63.516.8
Prime100%258.668.3
Standby89.123.5
Standby50%145.838.5
Standby75%211.655.9
Standby100%44.5

Available documents

Spec sheet — 1586422-Generator-Data (Caterpillar)Spec sheet — 3412-600-kW-Spec-Sheet (Caterpillar)Spec sheet — 3412C635ekwPrimeLowBSFC60HzL (Caterpillar)Spec sheet — 3412C650ekwStandbyLowBSFC60HzL (Caterpillar)Spec sheet — 3412C700ekwStandbyLowBSFC60HzL (Caterpillar)Spec sheet — 3412C725ekwPrimeLowBSFC60HzL (Caterpillar)Spec sheet — 3412C750kVAStandbylowbsfcEU50Hz (Caterpillar)Spec sheet — 3412C800ekwStandbyLowBSFC60HzL (Caterpillar)Spec sheet — 3412C800kVAStandbylowbsfcEU50Hz (Caterpillar)Spec sheet — 3412C810kVAPrimelowbsfcEU50Hz (Caterpillar)Spec sheet — 3412C900kVAStandbylowbsfcEU50Hz (Caterpillar)Spec sheet — 3412C900kVAStandbylowbsfcUS50hz (Caterpillar)Spec sheet — 3512C1230ekWContTier2 HV60HzUS (Caterpillar)Spec sheet — 3512C1500ekwStandby-HVTier2 (Caterpillar)Spec sheet — 41215001 catsr4bgenerator (Caterpillar)Spec sheet — C27650ekwStandbyLowBSFC NR (Caterpillar)Spec sheet — C27650ekwStandbyTier2 NR (Caterpillar)Spec sheet — C27700ekwStandbyLowBSFC NR (Caterpillar)Spec sheet — C27800ekwStandbyLowBSFC NR (Caterpillar)Spec sheet — C27800ekwStandbyTier2 NR (Caterpillar)Spec sheet — CAT-3508B (Caterpillar)Spec sheet — Generator-Specs-1 (Caterpillar)Spec sheet — HOLT-Industrial-Rentals-Power-Generator-1500-KW (Caterpillar)Spec sheet — LEHX0002-00 (Caterpillar)Spec sheet — LEHX0531 (Caterpillar)Spec sheet — LEHX0532 (Caterpillar)Spec sheet — LEHX0534-01 (Caterpillar)Spec sheet — LEHX0756 (Caterpillar)Spec sheet — SR4 Spec (Caterpillar)Spec sheet — XQ200 (Caterpillar)Spec sheet — XQ300-C9-T3 (Caterpillar)Service manual — 3456 Operation and Maintenanace Manual (Caterpillar)Service manual — SEBU7050 (Caterpillar)