CAT 1090073 SEAL O RIN for C18 Caterpillar Part - WSTPARTS

WSTPARTS supplies the 1090073 SEAL O RIN, a CAT Drivetrain replacement part designed for Caterpillar C18, 3412C and 3406E applications. It is categorized under Drivetrain. Every unit is fitment-verified before dispatch. Manual reference: 3406E: LUBRICATION SYSTEM, group 126-6886, page 203; C18: AIR INLET AND EXHAUST SYSTEM, group 126-5052, page 566.

1090073 SEAL O RIN for Caterpillar C18 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement SEAL O RIN (Part # 1090073). Designed for CAT C18, 3412C, 3406E equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT C18, 3412C, 3406E
• ✔ 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)	1090073
Product Name	SEAL O RIN
Brand	CAT
Applicable Models	C18, 3412C, 3406E
Weight	0.05 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 1090073 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	LUBRICATION SYSTEM	126-6886	p.203
C18	AIR INLET AND EXHAUST SYSTEM	126-5052	p.566
3412C	COOLING SYSTEM	166-0859	p.265
3406E	LUBRICATION SYSTEM	126-6886	p.205
C18	AIR INLET AND EXHAUST SYSTEM	201-2087	p.567
3406E	LUBRICATION SYSTEM	130-8901	p.220
C18	AIR INLET AND EXHAUST SYSTEM	310-5809	p.569
3406E	AIR INLET AND EXHAUST SYSTEM	126-5052	p.309

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.

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.

FAQ

Is 1090073 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 C18.

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