CAT 4L1250 NUT for 3516B Caterpillar Part - WSTPARTS
4L1250 NUT is a Bolt/Nut component engineered for Caterpillar 3516B, 3306 and C27 machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 325C: FUEL SYSTEM, group 190-8977, page 150; 3306: ELECTRICAL AND STARTING SYSTEM, group 192-0284, page 1099.
4L1250 NUT for Caterpillar 3516B — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement NUT (Part # 4L1250). Designed for CAT 3516B, 3306, C27, 325C, 330C equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3516B, 3306, C27, 325C, 330C
- ✔ 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) | 4L1250 |
| Product Name | NUT |
| Brand | CAT |
| Applicable Models | 3516B, 3306, C27, 325C, 330C |
| 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 4L1250 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 |
| 325C | FUEL SYSTEM | 190-8977 | p.150 |
| 3306 | ELECTRICAL AND STARTING SYSTEM | 192-0284 | p.1099 |
| 330C | FUEL SYSTEM | 190-8977 | p.172 |
| 3516B | ELECTRICAL AND STARTING SYSTEM | 325-6250 | p.659 |
| C27 | ELECTRICAL AND STARTING SYSTEM | 369-1719 | p.294 |
| 3306 | ELECTRICAL AND STARTING SYSTEM | 270-4639 | p.1102 |
| C27 | ELECTRICAL AND STARTING SYSTEM | 399-2334 | p.297 |
| 3516B | ELECTRICAL AND STARTING SYSTEM | 330-3345 | p.660 |
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 — 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.
FAQ
Is 4L1250 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
