CAT 4S6399 FITTING for 3516B Caterpillar Part - WSTPARTS

4S6399 FITTING is a Hydraulic System component engineered for Caterpillar 3516B, 3512 and 3306 machines, built to match original factory specifications. It is categorized under Hydraulic System. Every unit is fitment-verified before dispatch. Manual reference: 3306: ELECTRICAL AND STARTING SYSTEM, group 106-5520, page 1215; 3508C: ELECTRICAL AND STARTING SYSTEM, group 143-5173, page 345.

4S6399 FITTING for Caterpillar 3516B — Genuine CAT & Replacement Part

WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement FITTING (Part # 4S6399). Designed for CAT 3516B, 3512, 3306, 3516C, 3616, C9, G3508, G3608, G3612, G3616 equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT 3516B, 3512, 3306, 3516C, 3616, C9, G3508, G3608, G3612, G3616
• ✔ 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)	4S6399
Product Name	FITTING
Brand	CAT
Applicable Models	3516B, 3512, 3306, 3516C, 3616, C9, G3508, G3608, G3612, G3616
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 4S6399 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	106-5520	p.1215
3508C	ELECTRICAL AND STARTING SYSTEM	143-5173	p.345
3512	ELECTRICAL AND STARTING SYSTEM	207-4476	p.1125
3516B	ELECTRICAL AND STARTING SYSTEM	207-4476	p.663
3516C	ELECTRICAL AND STARTING SYSTEM	267-2716	p.423
C9	ELECTRICAL AND STARTING SYSTEM	261-1551	p.267
G3508	LUBRICATION SYSTEM	113-4238	p.177
G3608	LUBRICATION SYSTEM	164-5989	p.168

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 — LUBRICATION SYSTEM

The lubrication system covers the oil pump, oil cooler, oil filter base, relief valves, dipstick tube, pan and the galleries that distribute oil to every bearing in the engine. It is the system that keeps metal off metal. Failures tend to be either pressure loss — a worn pump, a stuck relief valve, a collapsed filter — or contamination, where sludge and debris circulate and score bearing surfaces. Oil pressure that reads low at idle, a filter that comes out heavy, or oil that turns dark far sooner than usual are the signals. Parts in this group are replaced on measured oil pressure and lab results rather than on interval alone.

FAQ

Is 4S6399 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