CAT 3J7354 SEAL O RIN for 345C Caterpillar Part - WSTPARTS
Need a dependable replacement part for your Caterpillar 345C, C18 and 3516B machine? The 3J7354 SEAL O RIN from WSTPARTS is manufactured to OEM-grade tolerances. Every unit is fitment-verified before dispatch, backed by factory-direct pricing and warranty coverage, and currently in stock for dispatch within 24 hours. Manual reference: 3126B: BASIC ENGINE, group 132-2057, page 177; 325C: ELECTRICAL AND STARTING SYSTEM, group 159-1822, page 328.
3J7354 SEAL O RIN for Caterpillar 345C — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement SEAL O RIN (Part # 3J7354). Designed for CAT 345C, C18, 3516B, 336D, 3516C, 3126B, 325C, 325D, 3306, 330C, 330D, 3406C, 3406E, 3412C, 345B, 3508C, 3512, 3512C, 3516, 3606, 3608, 3616, 365B, C13, C15, C27, C32, C7, C9, G3508, G3608, G3612, G3616, 320C, 320D, 345D equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 345C, C18, 3516B, 336D, 3516C, 3126B, 325C, 325D, 3306, 330C, 330D, 3406C, 3406E, 3412C, 345B, 3508C, 3512, 3512C, 3516, 3606, 3608, 3616, 365B, C13, C15, C27, C32, C7, C9, G3508, G3608, G3612, G3616, 320C, 320D, 345D
- ✔ 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) | 3J7354 |
| Product Name | SEAL O RIN |
| Brand | CAT |
| Applicable Models | 345C, C18, 3516B, 336D, 3516C, 3126B, 325C, 325D, 3306, 330C, 330D, 3406C, 3406E, 3412C, 345B, 3508C, 3512, 3512C, 3516, 3606, 3608, 3616, 365B, C13, C15, C27, C32, C7, C9, G3508, G3608, G3612, G3616, 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 3J7354 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 |
| 3126B | BASIC ENGINE | 132-2057 | p.177 |
| 325C | ELECTRICAL AND STARTING SYSTEM | 159-1822 | p.328 |
| 325D | LUBRICATION SYSTEM | 254-7342 | p.70 |
| 3306 | BASIC ENGINE | 138-2780 | p.171 |
| 330D | LUBRICATION SYSTEM | 187-0474 | p.67 |
| 336D | LUBRICATION SYSTEM | 187-0474 | p.80 |
| 3406C | BASIC ENGINE | 129-3948 | p.206 |
| 3406E | LUBRICATION SYSTEM | 126-6886 | p.203 |
System Notes — BASIC ENGINE
The basic engine group covers the core structure and internals: cylinder block, cylinder head, pistons, rings, liners, connecting rods, crankshaft, bearings, camshaft and the gasket sets that seal them. These parts determine compression, oil pressure and power output. They wear gradually — rings lose tension, bearings show copper, liners glaze — and the first signs are usually blow-by from the breather, rising oil consumption, or a knock that gets louder as the engine warms. Replacing a basic engine part is a planned overhaul decision rather than a roadside fix, so matching the exact part number and serial number range matters more here than anywhere else on the machine.
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 3J7354 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?
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
