CAT 7L4774 SEAL O RIN for 3406C Caterpillar Part - WSTPARTS
The 7L4774 SEAL O RIN is a genuine and high-quality OEM replacement part compatible with Caterpillar 3406C equipment. It is categorized under Seal. 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: 3406C: BASIC ENGINE, group 100-6920, page 185; 3406C: BASIC ENGINE, group 350-4422, page 199.
7L4774 SEAL O RIN for Caterpillar 3406C — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement SEAL O RIN (Part # 7L4774). Designed for CAT 3406C equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3406C
- ✔ 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) | 7L4774 |
| Product Name | SEAL O RIN |
| Brand | CAT |
| Applicable Models | 3406C |
| 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 7L4774 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 |
| 3406C | BASIC ENGINE | 100-6920 | p.185 |
| 3406C | BASIC ENGINE | 100-6920 | p.188 |
| 3406C | BASIC ENGINE | 350-4422 | p.199 |
| 3406C | BASIC ENGINE | 350-4424 | p.200 |
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 7L4774 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 3406C.
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
