CAT 5P4939 SCREW A for 3512 Caterpillar Part - WSTPARTS
Need a dependable Bolt/Nut part for your Caterpillar 3512 and 3306 machine? The 5P4939 SCREW A from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3306: FUEL SYSTEM, group 108-2865, page 710; 3512: OPERATOR STATION, group 030-7946, page 1035.
5P4939 SCREW A for Caterpillar 3512 — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement SCREW A (Part # 5P4939). Designed for CAT 3512, 3306 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3512, 3306
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
- ✔ In stock, ready to ship
Specifications
| Part Number (MPN) | 5P4939 |
| Product Name | SCREW A |
| Brand | CAT |
| Applicable Models | 3512, 3306 |
| 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 5P4939 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 | FUEL SYSTEM | 108-2865 | p.710 |
| 3512 | OPERATOR STATION | 030-7946 | p.1035 |
| 3412C | FUEL SYSTEM | 111-4121 | p.396 |
| 3306 | FUEL SYSTEM | 179-8213 | p.712 |
| 3412C | FUEL SYSTEM | 111-4122 | p.398 |
| 3512 | OPERATOR STATION | 153-4906 | p.1421 |
| 3306 | FUEL SYSTEM | 179-8213 | p.724 |
| 3306 | FUEL SYSTEM | 179-8213 | p.725 |
System Notes — FUEL SYSTEM
The fuel system covers the injection pump, injectors, fuel transfer pump, filters and water separator, lines and the tank. It meters and atomises diesel at the precise moment and quantity the engine needs. Modern CAT engines run very tight injector tolerances, so the group is sensitive to water and dirt: a worn injector dribbles instead of atomising, causing rough idle, white smoke and diluted oil, while a clogged filter starves the pump under load. Parts here are replaced when the engine misfires, smokes, loses power under load, or when the water separator keeps tripping — always after the fuel quality itself has been ruled out.
System Notes — OPERATOR STATION
The operator station covers the cab structure, seat and suspension, glass, wipers, door hardware, pedals, joysticks, armrests, HVAC ducting and the interior trim. It is the group that decides how tolerable a ten-hour shift feels. Wear here is driven by daily entry and exit, sun exposure and dust: seat suspensions sag, door struts lose charge, wiper linkages seize, and rubber seals harden until the cab leaks in rain. Parts in this group are replaced when a control feels vague, a latch no longer holds, or the cab no longer keeps dust and water out — small items, but the ones operators complain about first.
FAQ
Is 5P4939 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 3512.
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?
In stock — ships within 24 hours. Every order is covered by a warranty per quotation.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
