CAT 4W8743 SOCKET for 3306 Caterpillar Part - WSTPARTS
Need a dependable Repair Tools part for your Caterpillar 3306 machine? The 4W8743 SOCKET from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Repair Tools. Every unit is fitment-verified before dispatch. Manual reference: 3306: ELECTRICAL AND STARTING SYSTEM, group 131-5454, page 1078; 3306: ELECTRICAL AND STARTING SYSTEM, group 440-2105, page 1085.
4W8743 SOCKET for Caterpillar 3306 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement SOCKET (Part # 4W8743). Designed for CAT 3306 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3306
- ✔ 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) | 4W8743 |
| Product Name | SOCKET |
| Brand | CAT |
| Applicable Models | 3306 |
| Weight | 0.09 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 4W8743 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 | ELECTRICAL AND STARTING SYSTEM | 131-5454 | p.1078 |
| 3306 | ELECTRICAL AND STARTING SYSTEM | 440-2105 | p.1085 |
| 3306 | OPERATOR STATION | 130-3349 | p.1720 |
| 3306 | OPERATOR STATION | 130-3349 | p.1722 |
| 3306 | OPERATOR STATION | 106-5171 | p.1745 |
| 3306 | OPERATOR STATION | 106-5171 | p.1752 |
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 — 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 4W8743 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 3306.
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
