CAT 4W5138 FILM Caterpillar Part - WSTPARTS
4W5138 FILM — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement FILM (Part # 4W5138). Designed for CAT Caterpillar equipment.
Key Features
- ✔ 100% compatible with CAT matching models
- ✔ 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) | 4W5138 |
| Product Name | FILM |
| Brand | CAT |
| 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 4W5138 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 |
| 3306 | GENERATORS | 109-3771 | p.1427 |
| 3412C | GENERATORS | 149-2429 | p.780 |
| 3512C | GENERATORS | 110-6608 | p.406 |
| 3306 | GENERATORS | 109-3775 | p.1428 |
| 3412C | GENERATORS | 149-2431 | p.781 |
| 3512C | GENERATORS | 144-1826 | p.407 |
| 3306 | GENERATORS | 109-3777 | p.1429 |
| 3412C | GENERATORS | 149-2433 | p.782 |
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 4W5138 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.
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
