CAT 1999751 SEAL-O-RIN for C175 Caterpillar Part - WSTPARTS
1999751 SEAL-O-RIN is a Drivetrain component engineered for Caterpillar C175, C4.4 and 3056E machines, built to match original factory specifications. It is categorized under Drivetrain. Every unit is fitment-verified before dispatch. Manual reference: 3056E: FUEL SYSTEM, group 217-0109, page 121; C175: COOLING SYSTEM, group 245-4864, page 229.
1999751 SEAL-O-RIN for Caterpillar C175 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement SEAL-O-RIN (Part # 1999751). Designed for CAT C175, C4.4, 3056E equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT C175, C4.4, 3056E
- ✔ 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) | 1999751 |
| Product Name | SEAL-O-RIN |
| Brand | CAT |
| Applicable Models | C175, C4.4, 3056E |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1999751 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 |
| 3056E | FUEL SYSTEM | 217-0109 | p.121 |
| C175 | COOLING SYSTEM | 245-4864 | p.229 |
| C4.4 | BASIC ENGINE | 233-7234 | p.129 |
| 3056E | FUEL SYSTEM | 228-8965 | p.125 |
| C4.4 | BASIC ENGINE | 273-1454 | p.156 |
System Notes — FUEL SYSTEM
The fuel system covers the injection pump, injectors, fuel transfer pump, filters and water separator, lines and the tank. It meters and atomises diesel at the precise moment and quantity the engine needs. Modern CAT engines run very tight injector tolerances, so the group is sensitive to water and dirt: a worn injector dribbles instead of atomising, causing rough idle, white smoke and diluted oil, while a clogged filter starves the pump under load. Parts here are replaced when the engine misfires, smokes, loses power under load, or when the water separator keeps tripping — always after the fuel quality itself has been ruled out.
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.
FAQ
Is 1999751 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 C175.
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
