CAT 4W5998 ROD AS for 3412C Caterpillar Part - WSTPARTS
Need a dependable Valve Assembly part for your Caterpillar 3412C and 3406C machine? The 4W5998 ROD AS from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Valve Assembly. Every unit is fitment-verified before dispatch. Manual reference: 3406C: BASIC ENGINE, group 101-1817, page 381; 3412C: BASIC ENGINE, group 100-6889, page 212.
4W5998 ROD AS for Caterpillar 3412C — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement ROD AS (Part # 4W5998). Designed for CAT 3412C, 3406C equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3412C, 3406C
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 4W5998 |
| Product Name | ROD AS |
| Brand | CAT |
| Applicable Models | 3412C, 3406C |
| Weight | 0.27 kg |
| Condition | New (Genuine CAT / OEM-equivalent direct replacement) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 4W5998 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 | 101-1817 | p.381 |
| 3412C | BASIC ENGINE | 100-6889 | p.212 |
| 3406C | BASIC ENGINE | 236-0485 | p.382 |
| 3406C | BASIC ENGINE | 101-1818 | p.383 |
| 3406C | BASIC ENGINE | 214-1666 | p.384 |
| 3406C | BASIC ENGINE | 351-2223 | p.385 |
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 4W5998 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 3412C.
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?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a warranty per quotation.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
