CAT 8R8847 RETAINER for C15 Caterpillar Part - WSTPARTS
8R8847 RETAINER is a Spring component engineered for Caterpillar C15 and C9 machines, built to match original factory specifications. It is categorized under Spring. Every unit is fitment-verified before dispatch. Manual reference: C15: ELECTRICAL AND STARTING SYSTEM, group 374-0437, page 188; C9: GENERATORS, group 433-2701, page 282.
8R8847 RETAINER for Caterpillar C15 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement RETAINER (Part # 8R8847). Designed for CAT C15, C9 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT C15, C9
- ✔ 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) | 8R8847 |
| Product Name | RETAINER |
| Brand | CAT |
| Applicable Models | C15, C9 |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 8R8847 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 |
| C15 | ELECTRICAL AND STARTING SYSTEM | 374-0437 | p.188 |
| C9 | GENERATORS | 433-2701 | p.282 |
| C15 | ELECTRICAL AND STARTING SYSTEM | 379-0926 | p.189 |
| C15 | ELECTRICAL AND STARTING SYSTEM | 379-0891 | p.190 |
| C15 | ELECTRICAL AND STARTING SYSTEM | 358-4737 | p.192 |
| C15 | ELECTRICAL AND STARTING SYSTEM | 349-5650 | p.194 |
| C15 | ELECTRICAL AND STARTING SYSTEM | 379-0893 | p.199 |
| C15 | ELECTRICAL AND STARTING SYSTEM | 379-0894 | p.200 |
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 — GENERATORS
The generators group covers the alternator end of a generator set: stator, rotor, exciter, bearings, coupling disc, terminal box and the voltage regulation hardware. It converts engine rotation into electrical output at a held voltage and frequency. Bearing wear and insulation degradation are the two long-term concerns — a bearing that starts to rumble will eventually seize and take the rotor with it, while moisture and heat slowly break down winding insulation. Parts in this group are replaced when vibration rises, when insulation resistance falls on a megger test, or when output voltage becomes unstable under load.
FAQ
Is 8R8847 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 C15.
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
