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Caterpillar 3126B Engine Engine

Part of the Caterpillar 3126B engine family — 2 variants share parts & fitment.

Engine specifications

Displacement	7.2 L
Cylinders	6
Aspiration	ATAAC1
Rated speed	2500 rpm
Gross power	336 kW

Equipment powered by this engine

114

John Deere 1550 John Deere 1850 John Deere 2054 John Deere 210L John Deere 210LE John Deere 2154D John Deere 310G John Deere 310K John Deere 310K EP John Deere 310L EP John Deere 310SG John Deere 310SK John Deere 315SG John Deere 315SK John Deere 3200 John Deere 3200 John Deere 3215 John Deere 3220 John Deere 324H John Deere 325J John Deere 3310 John Deere 3400 John Deere 3400 John Deere 3410 John Deere 3415 John Deere 3420 John Deere 344H John Deere 3522 John Deere 3800 John Deere 410G John Deere 410K John Deere 410K TC John Deere 450G John Deere 455G John Deere 5-750 John Deere 5-754 John Deere 5-800 John Deere 5-804 John Deere 5-900 John Deere 5038D John Deere 5045D John Deere 5050D John Deere 5050E John Deere 5055D John Deere 5058E John Deere 5060EN John Deere 5070M John Deere 5075EN John Deere 5080EN John Deere 5080M John Deere 5103E John Deere 5103S John Deere 5104 John Deere 5203S John Deere 5204 John Deere 5215 John Deere 5315 John Deere 5405 John Deere 5410N John Deere 5415 John Deere 5503 John Deere 550G John Deere 5515 John Deere 555G John Deere 6010 John Deere 6020 John Deere 6090M John Deere 6100E John Deere 6100J John Deere 6100M John Deere 6110L John Deere 6115E John Deere 6120L John Deere 6120M John Deere 6130E John Deere 6140J John Deere 6145J John Deere 6155J John Deere 6155JH John Deere 6210L John Deere 6220L John Deere 6310L John Deere 6310S John Deere 6320L John Deere 6410L John Deere 6410S John Deere 6420L John Deere 650G John Deere 6B-1204 John Deere 6E-1204 John Deere 710G John Deere 7405 John Deere 7425 John Deere 7515 John Deere 7525 John Deere 9880i STS HILLMASTER John Deere L514 John Deere S680HM John Deere S685HM John Deere S690HM John Deere S7 600 John Deere S7 700 John Deere S7600 John Deere S7700 John Deere SE6010 John Deere SE6020 John Deere SE6110 John Deere SE6120 John Deere SE6210 John Deere SE6220 John Deere SE6310 John Deere SE6410 John Deere W100 John Deere W80

Parts cataloged across the Caterpillar 3126B family

Part #	Description	Category
DZ117503	ALTERNATOR (24V, 140A)	alternator
2100-5789	Remote Grease Fitting	belt
8991188	Check Valve Assembly	check_valve_assembly
2133193	Connecting rods	connecting_rod
g00737484	Hydraulic Electronic Unit Injectors	electrical
1R-0753	Fuel Secondary - ADV	filter
10R-0781	REMANUFACTURED FUEL INJECTOR - 3126B (GP, TYPE 2)	fuel_injector
M-2886699	Gasket Set - Front Structure	gasket
64F4M072SB	1WM 3126 Series, 2-Valve, AllHP Any long block with installed injector set	injector
64F8M072SB	7AS, 8YL, 9SZ, CKM, HEP 3126 Series, 3-valve, All HP, Any long block with installed injector set	injector
g00107406	Clutch	mechanical
g00367054	Engine Lifting	mechanical
119-5152	Coolant Extender**	oil_filter
101-2844	Oil Pan	other_service
64F4D250SB	3126 Series, 2-valve, AllHP	other_service
64F4L072WM	3126 Series, 2-valve, 170-300HP, 1WM Serial Numbers - All, (built with the articulated cast steel 2 piece piston)	other_service
64F8D190SB	7AS, 8YL, 9SZ, CKM 3126, 3-valve, 190-210HP, Freightliner	other_service
64F8D210SB	7AS, 8YL, 9SZ, CKM 3126, 3-Valve, 190-210HP, GMC Bus, Thomas Bus	other_service
64F8D230SB	7AS, 8YL, 9SZ, CKM 3126, 3-Valve, 230HP, Freightliner	other_service
64F8D250SB	7AS, 8YL, 9SZ, CKM 3126, 3-Valve, 250-up HP, Freightliner	other_service
64F8D300SB	7AS, 8YL, 9SZ, CKM 3126, 3-Valve, 230-up HP, GMC Bus	other_service
64F8L072A	3126 Series, 3-valve, 190-210HP, 1-piece piston, 1283883 Front Housing	other_service
64F8L072B	3126 Series, 3-valve, 230HP & UP, 2-piece piston, 1283883 Front Housing	other_service
64G1L072SB	3126 Series, Long Block, Build to Order	other_service
64G2D210SB	HEP 3126, 3-valve, 190-210HP, Freightliner	other_service
64G2D250SB	HEP 3126, 3-Valve, 230-up HP, Freightliner	other_service
64G2L072A	3126 Series, 3-valve, 190-210HP, 1-piece piston, Cast Iron Front Housing	other_service
64G2L072B	HEP 3126 Series, 3-valve, 230HP & Up, 2-piece piston, Cast Iron Front Housing	other_service
AEHQ5589	Heavy-Duty Hinged Radiator Grille	other_service
PEHP9528	Cat Reman Piston Pack	other_service
g00704000	Exhaust shield (if equipped)	other_service
g00772964	Illustration 23	other_service
g00805525	Illustration 22 - Typical example Left side view	other_service
i00838797	Customer Specified Parameters	other_service
i01097883	Important Safety Information	other_service
i01103904	Engine Starting	other_service
i01143691	Engine Electronics	other_service
i01324368	Cold Start Strategy	other_service
i01324374	Engine Operation with Active Diagnostic Codes	other_service
i01359666	Support the component properly when work beneath the component is performed	other_service
i01372247	Mounting and Dismounting	other_service
i01372254	Cooling system conditioner	other_service
i01399675	Safety Signs and Labels	other_service
i01421840	Before Starting Engine	other_service
i01456258	Welding on Engines with Electronic Controls	other_service
i01456915	Engine Operation with Intermittent Diagnostic Codes	other_service
i01462046	Engine Stopping	other_service
i01463242	Self-Diagnostics	other_service
i01463253	Diagnostic Lamp	other_service
i01468706	Cold Weather Starting	other_service
i01481981	Electrical System	other_service
i01486758	Before Starting Engine	other_service
i01512354	Starting the Engine	other_service
i01548661	Diagnostic Flash Code Retrieval	other_service
2100-4369	Radiator	radiator
i01549500	Sensors and Electrical Components	sensor
PEHP7069-01	Reman Water Pump	water_pump

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Also powers generators

This engine powers 4 generator set(s) on Facts About Generators — same parts apply.

Common questions

What equipment uses the Caterpillar 3126B engine?

The Caterpillar 3126B engine powers 114 machine(s), including John Deere 1550, John Deere 1850, John Deere 2054, John Deere 210L, John Deere 210LE.

What is the displacement of the Caterpillar 3126B?

The Caterpillar 3126B has a displacement of 7.2 liters.