CAT 6V1903 SEAL-O-RIN for 3516B Caterpillar Part - WSTPARTS

Need a dependable Drivetrain part for your Caterpillar 3516B, C15 and G3616 machine? The 6V1903 SEAL-O-RIN from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Drivetrain. 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: 3406E: AIR INLET AND EXHAUST SYSTEM, group 123-6808, page 285; 345B: BASIC ENGINE, group 131-6678, page 50.

6V1903 SEAL-O-RIN for Caterpillar 3516B — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement SEAL-O-RIN (Part # 6V1903). Designed for CAT 3516B, C15, G3616, 3406E, 3412C, 3606, 3608, 3616, C13, G3608, G3612, 320C, 345B equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT 3516B, C15, G3616, 3406E, 3412C, 3606, 3608, 3616, C13, G3608, G3612, 320C, 345B
• ✔ Meets Caterpillar original quality and performance standards
• ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
• ✔ In stock, ready to ship

Specifications

Part Number (MPN)	6V1903
Product Name	SEAL-O-RIN
Brand	CAT
Applicable Models	3516B, C15, G3616, 3406E, 3412C, 3606, 3608, 3616, C13, G3608, G3612, 320C, 345B
Weight	0.05 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 6V1903 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
3406E	AIR INLET AND EXHAUST SYSTEM	123-6808	p.285
345B	BASIC ENGINE	131-6678	p.50
3516B	COOLING SYSTEM	166-5931	p.393
C13	BASIC ENGINE	264-7790	p.242
C15	BASIC ENGINE	240-4861	p.365
G3608	COOLING SYSTEM	174-6918	p.210
G3612	COOLING SYSTEM	195-3916	p.109
G3616	COOLING SYSTEM	195-3916	p.347

System Notes — AIR INLET AND EXHAUST SYSTEM

The air inlet and exhaust system covers the air cleaner housing and elements, intake piping, turbocharger, aftercooler, exhaust manifold, turbo mounting hardware and gaskets. It delivers clean, dense air and carries hot gas away. On this group, the two dominant failures are dust ingress and heat cycling: a leaking intake joint lets unfiltered air straight into the cylinders and dusts the rings in a few hundred hours, while exhaust manifold and turbo flange gaskets crack from repeated heat cycles and start whistling or sooting. Parts are replaced when boost drops, the intake tract shows dust trails past the filter, or a soot streak appears at a joint.

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.

FAQ

Is 6V1903 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 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?
In stock — ships within 24 hours. Every order is covered by a 12-month warranty.

📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com