7N-3218 thrust washer 8.5 mm for CAT engine spare part

7N-3218 thrust washer 8.5 mm for CAT engine spare part Featured Image
  • 7N-3218 thrust washer 8.5 mm for CAT engine spare part
  • 7N-3218 thrust washer 8.5 mm for CAT engine spare part

Short Description:

Thrust washer for Caterpillar 3508/3512/3516 engine overhaul, thickness 8.5 mm, limits crankshaft axial movement and maintains proper crank end play.

Product Detail

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description

The thrust washer is a critical axial limiting component in the engine crankshaft assembly. It bears the axial thrust generated by crankshaft operation and restricts crankshaft axial displacement within the range specified in the service manual, preventing the crankshaft from moving back and forth and striking main bearings, connecting rod bearings and timing components.

This thrust washer adopts a steel-backed composite anti-friction alloy structure. The surface alloy features good wear resistance and anti-seizure performance. It can steadily maintain the lubricating oil film and reduce friction loss under continuous high-load working conditions of high-power diesel and gas engines.

The part has tight thickness tolerance. It can be used to accurately adjust crankshaft end play during engine overhaul. Its dimensions conform to Caterpillar OEM specifications with stable interchangeability and fits multiple engine models of the 3500 series.

Part Number: 7N-3218
Name: Thrust washer
Thickness: 8.5 mm
Applicable Models: Caterpillar 3508, 3512, 3516, G3512, G3516 engine
Height (in): 0.3
Length (in): 8.0
Material: Carbon Steel
Function: Crankshaft axial positioning

Product Advantages

1. Wear-resistant alloy surface with high load capacity, suitable for high-power gas and diesel engine conditions
2. Precise thickness tolerance for accurate crankshaft end play adjustment during overhaul
3. Matches Caterpillar OEM assembly dimensions, good interchangeability for 3500 series engines
4. Surface oil retention groove design to sustain lubricating oil film and reduce dry friction risk

FAQ 

Q: What symptoms occur when the thrust washer wears out?
A: Dull knocking noise appears at idle or load change, crankshaft end play increases, and bearing damage or timing failure may occur in severe cases.

Q: Can I mix 7N-3218 with thrust washers of different thickness?
A: Not recommended. Different thickness will change crankshaft end play and lead to poor lubrication and premature wear.

Q: How many 7N-3218 washers are needed for one crankshaft?
A: Normally installed in pairs on both sides of the crankshaft thrust journal, follow the service manual of the target engine.

Q: If end play is still out of spec after replacing washers?
A: Inspect the thrust journal of crankshaft. If the journal is worn, crankshaft repair or replacement is required instead of only changing washers.

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