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Caterpillar 3126B Engine Family 2 variants

The Caterpillar 3126B engine line groups 2 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.

Variants in this family

3126B 3126B ATAAC

Generator sets using this engine family

Caterpillar 3126

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.

Aftermarket parts that fit this family

S300W find 241-9059 FridayParts $933.50 329-8051 FridayParts $933.50 3126B kuduparts $18.00 SJB00001-UP find 272-6955 find 247-8782 find 318C yemparts $32.22 320C sinocmp $6.00 320D sinocmp $35.00 321C yemparts $42.22 322C yemparts $29.15 323D yemparts $35.77 324D yemparts $29.15 325C sinocmp $6.00 3E-0156 sinocmp $29.00 966D yemparts $52.61 966E yemparts $52.61 950E yemparts $52.61 950B yemparts $52.61 3E-5382 yemparts $290.58 446B yemparts $66.79 AP-1000 yemparts $30.72 AP-1050 yemparts $81.78 7Y-0463 yemparts $37.03 320DL yemparts $37.03 320D2 yemparts $37.03 325B yemparts $37.03 7V-3842 find 125-8810 find 950F yemparts $52.61 960F yemparts $127.43 966H yemparts $129.53 966M find 970F yemparts $31.48 972H sinocmp $69.00 213-0772 FridayParts $148.80 3176C kuduparts $18.00 7G-7889 sinocmp $329.00 105-4849 FridayParts $82.99 914G yemparts $42.24 924G yemparts $43.48 950H yemparts $58.17 972G yemparts $49.44 3E-6466 FridayParts $73.99 162-2073 FridayParts $73.99 3406C atldiesel $0.73 910E yemparts $42.24 918F yemparts $42.24 924F FridayParts $78.60 962G yemparts $54.51 107-4401 FridayParts $43.99 3054C woodline $9.24 3056E woodline $3.85 928G yemparts $106.33 938F yemparts $54.51 109-7041 FridayParts $44.00 924H yemparts $48.94 928HZ yemparts $40.62 930G yemparts $53.16

Leads compiled from supplier catalogs across the family’s variants; verify the exact part for your variant and serial number.