CAT 9L8781 WASHER for 3516B Caterpillar Part - WSTPARTS
9L8781 WASHER is a Bolt/Nut component engineered for Caterpillar 3516B, 3512 and 3516 machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3512: COOLING SYSTEM, group 120-7421, page 479; 3516: COOLING SYSTEM, group 127-5400, page 253.
9L8781 WASHER for Caterpillar 3516B — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement WASHER (Part # 9L8781). Designed for CAT 3516B, 3512, 3516 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3516B, 3512, 3516
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 9L8781 |
| Product Name | WASHER |
| Brand | CAT |
| Applicable Models | 3516B, 3512, 3516 |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 9L8781 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.
| Machine | System | Group No. | Manual Page |
| 3512 | COOLING SYSTEM | 120-7421 | p.479 |
| 3516 | COOLING SYSTEM | 127-5400 | p.253 |
| 3516B | COOLING SYSTEM | 127-5400 | p.425 |
| 3512 | COOLING SYSTEM | 120-7421 | p.481 |
| 3516 | COOLING SYSTEM | 127-5400 | p.255 |
| 3516B | COOLING SYSTEM | 127-5400 | p.432 |
| 3512 | COOLING SYSTEM | 127-5400 | p.604 |
| 3512 | COOLING SYSTEM | 127-5400 | p.606 |
System Notes — COOLING SYSTEM
The cooling system covers the radiator, water pump, thermostat, fan and fan drive, coolant hoses, clamps, the surge tank and the belts that drive it. It holds engine temperature inside the range where clearances and oil film stay correct. Failures are usually slow and then sudden: a hose softens and balloons before it bursts, a water pump seal starts weeping from the weep hole, a thermostat sticks partly open so the engine runs cold and burns more fuel. On construction sites the radiator also packs with dust and debris, which raises pressure across the core and finds the weakest hose or clamp first.
FAQ
Is 9L8781 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT 3516B.
Genuine vs OEM replacement — what is the difference?
Genuine CAT parts carry an anti-counterfeit label. OEM equivalents are built to the same specifications, bench-tested and supplied with full warranty at a better price.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a 12-month warranty.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
