CAT 1178766 SEAL-O RIN for 3516B Caterpillar Part - WSTPARTS
1178766 SEAL-O RIN is a Drivetrain component engineered for Caterpillar 3516B, 365B and 3516C machines, built to match original factory specifications. It is categorized under Drivetrain. Every unit is fitment-verified before dispatch. Manual reference: 3508C: ELECTRICAL AND STARTING SYSTEM, group 295-4636, page 336; 3516: ELECTRICAL AND STARTING SYSTEM, group 265-9034, page 534.
1178766 SEAL-O RIN for Caterpillar 3516B — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement SEAL-O RIN (Part # 1178766). Designed for CAT 3516B, 365B, 3516C, 3508C, 3516 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3516B, 365B, 3516C, 3508C, 3516
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 1178766 |
| Product Name | SEAL-O RIN |
| Brand | CAT |
| Applicable Models | 3516B, 365B, 3516C, 3508C, 3516 |
| Weight | 0.05 kg |
| Condition | New (Genuine CAT / OEM-equivalent direct replacement) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1178766 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 |
| 3508C | ELECTRICAL AND STARTING SYSTEM | 295-4636 | p.336 |
| 3516 | ELECTRICAL AND STARTING SYSTEM | 265-9034 | p.534 |
| 3516B | ELECTRICAL AND STARTING SYSTEM | 237-9016 | p.701 |
| 3516C | ELECTRICAL AND STARTING SYSTEM | 295-4636 | p.516 |
| 365B | HYDRAULIC SYSTEM | 185-0217 | p.381 |
| 3516 | ELECTRICAL AND STARTING SYSTEM | 129-6628 | p.535 |
| 3516B | ELECTRICAL AND STARTING SYSTEM | 295-4636 | p.777 |
System Notes — ELECTRICAL AND STARTING SYSTEM
The electrical and starting system covers the battery, starter motor, alternator, wiring harness, relays, switches and the instrument panel. It carries current from the batteries to the starter to crank the engine, and from the alternator back to keep the batteries charged. Because these machines work in dust, vibration and wide temperature swings, connectors corrode, harness insulation chafes against the frame, and starter solenoids burn out from repeated short cranks. Parts in this group are usually replaced on a symptom basis — slow cranking, a dash warning, lights that dim under load, or a no-start condition traced to an open circuit.
System Notes — HYDRAULIC SYSTEM
The hydraulic system covers the main pump, control valves, cylinders, hydraulic tank, filters, hoses and all the fittings that connect them. It converts engine power into the pressure and flow that drive boom, bucket, steering and travel functions. Hydraulic parts fail mainly through contamination and heat: dirt that passes a worn breather scores pump components, aged hoses crack at the crimp, and O-rings harden and weep under pressure. A part in this group is normally replaced when a function drifts, a cylinder creeps, oil shows up under a machine that used to be dry, or the filter comes out loaded with metal.
FAQ
Is 1178766 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 CAT vs direct replacement — what is the difference?
Genuine CAT covers three factory lines: New Genuine, Cat Reman (core exchange with core charge) and Cat Classic (brand-new economy line). OEM-equivalent direct replacements are non-CAT parts; grade and warranty are confirmed in the quotation.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a warranty per quotation.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
