CAT 1773639 ROTOR AS for 3412C Caterpillar Part - WSTPARTS
1773639 ROTOR AS for Caterpillar 3412C — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement ROTOR AS (Part # 1773639). Designed for CAT 3412C equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3412C
- ✔ 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) | 1773639 |
| Product Name | ROTOR AS |
| Brand | CAT |
| Applicable Models | 3412C |
| Weight | 875.61 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1773639 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 |
| 3412C | GENERATORS | 149-2435 | p.800 |
| 3412C | GENERATORS | 149-2436 | p.802 |
| 3412C | GENERATORS | 153-3069 | p.816 |
| 3412C | GENERATORS | 153-3070 | p.818 |
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 1773639 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 3412C.
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
