7D8878 Thrust Washer

The 7D8878 is a steel thrust washer for Caterpillar engines and machines. It is used in Caterpillar equipment with 3116, 3126, 3126B, 3176C, 3304, 3306, C-9, C6.6, C7, and C9 engines. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is identified by the SKU 7D8878 and is intended for applications where a thrust washer with the specified inside diameter, outside diameter, and thickness is required. The listed equipment compatibility covers Caterpillar engine-machine applications rather than a separate loader, excavator, or tractor model designation.

Fitment

• Caterpillar equipment with 3116 engine
• Caterpillar equipment with 3126 engine
• Caterpillar equipment with 3126B engine
• Caterpillar equipment with 3176C engine
• Caterpillar equipment with 3304 engine
• Caterpillar equipment with 3306 engine
• Caterpillar equipment with C-9 engine
• Caterpillar equipment with C6.6 engine
• Caterpillar equipment with C7 engine
• Caterpillar equipment with C9 engine

Cross-reference numbers

• 7D8878
• 7D-8878

The numbers 7D8878 and 7D-8878 identify the same washer reference in different written formats. Verify the equipment application and dimensional requirements before installation when replacing a removed part marked with one of these numbers.

Specifications

The washer is a flat annular component with a thrust-bearing function. Its primary dimensional identification is based on the 3.02 in inside diameter, 4.22 in outside diameter, and 0.08 in thickness. These dimensions should be checked against the removed washer and the applicable Caterpillar engine assembly before fitting.

The listed engine applications are 3116, 3126, 3126B, 3176C, 3304, 3306, C-9, C6.6, C7, and C9. Equipment model names are not specified in the available data; therefore, compatibility is stated by Caterpillar engine application.