CAT 7X7729 WASHER for 345C Caterpillar Part - WSTPARTS

Need a dependable Bolt/Nut part for your Caterpillar 345C, 3516B and 345B machine? The 7X7729 WASHER from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 325C: COOLING SYSTEM, group 183-8089, page 96; 325D: HYDRAULIC SYSTEM, group 233-1115, page 381.

7X7729 WASHER for Caterpillar 345C — Genuine CAT & Replacement Part

WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement WASHER (Part # 7X7729). Designed for CAT 345C, 3516B, 345B, 336D, 325C, 325D, 330C, 330D, 3412C, 365B, C13, C175, C27, C32, C7, C9, 320C, 320D, 345D equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT 345C, 3516B, 345B, 336D, 325C, 325D, 330C, 330D, 3412C, 365B, C13, C175, C27, C32, C7, C9, 320C, 320D, 345D
• ✔ 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)	7X7729
Product Name	WASHER
Brand	CAT
Applicable Models	345C, 3516B, 345B, 336D, 325C, 325D, 330C, 330D, 3412C, 365B, C13, C175, C27, C32, C7, C9, 320C, 320D, 345D
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 7X7729 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	COOLING SYSTEM	183-8089	p.96
325D	HYDRAULIC SYSTEM	233-1115	p.381
330C	COOLING SYSTEM	193-2711	p.109
330D	LUBRICATION SYSTEM	239-6409	p.74
336D	LUBRICATION SYSTEM	239-6409	p.88
3412C	LUBRICATION SYSTEM	166-0857	p.219
345B	HYDRAULIC SYSTEM	131-8848	p.434
345C	AIR INLET AND EXHAUST SYSTEM	233-1275	p.103

System Notes — COOLING SYSTEM

The cooling system covers the radiator, water pump, thermostat, fan and fan drive, coolant hoses, clamps, the surge tank and the belts that drive it. It holds engine temperature inside the range where clearances and oil film stay correct. Failures are usually slow and then sudden: a hose softens and balloons before it bursts, a water pump seal starts weeping from the weep hole, a thermostat sticks partly open so the engine runs cold and burns more fuel. On construction sites the radiator also packs with dust and debris, which raises pressure across the core and finds the weakest hose or clamp first.

System Notes — HYDRAULIC SYSTEM

The hydraulic system covers the main pump, control valves, cylinders, hydraulic tank, filters, hoses and all the fittings that connect them. It converts engine power into the pressure and flow that drive boom, bucket, steering and travel functions. Hydraulic parts fail mainly through contamination and heat: dirt that passes a worn breather scores pump components, aged hoses crack at the crimp, and O-rings harden and weep under pressure. A part in this group is normally replaced when a function drifts, a cylinder creeps, oil shows up under a machine that used to be dry, or the filter comes out loaded with metal.

FAQ

Is 7X7729 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 345C.

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