CAT 1B5174 PLUG for C18 Caterpillar Part - WSTPARTS
1B5174 PLUG is a Electrical System component engineered for Caterpillar C18, 3512 and 3306 machines, built to match original factory specifications. It is categorized under Electrical System. Every unit is fitment-verified before dispatch. Manual reference: 3306: AIR INLET AND EXHAUST SYSTEM, group 110-3866, page 598; 3406C: BASIC ENGINE, group 352-3619, page 298.
1B5174 PLUG for Caterpillar C18 — Genuine & OEM Replacement Part
WSTPARTS supplies genuine and high-quality OEM replacement PLUG (Part # 1B5174). Designed for CAT C18, 3512, 3306, 3406C, 3412C, G3508 equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT C18, 3512, 3306, 3406C, 3412C, G3508
- ✔ 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) | 1B5174 |
| Product Name | PLUG |
| Brand | CAT |
| Applicable Models | C18, 3512, 3306, 3406C, 3412C, G3508 |
| Weight | 0.05 kg |
| Condition | New (Genuine / OEM Equivalent) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 1B5174 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 |
| 3306 | AIR INLET AND EXHAUST SYSTEM | 110-3866 | p.598 |
| 3406C | BASIC ENGINE | 352-3619 | p.298 |
| 3412C | BASIC ENGINE | 153-2214 | p.169 |
| 3512 | LUBRICATION SYSTEM | 148-8007 | p.337 |
| C18 | BASIC ENGINE | 262-9957 | p.261 |
| G3508 | BASIC ENGINE | 106-2778 | p.66 |
| 3306 | AIR INLET AND EXHAUST SYSTEM | 184-7209 | p.603 |
| 3406C | BASIC ENGINE | 155-5619 | p.307 |
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 1B5174 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?
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
