CAT 9Y1979 GASKET for 305.5E2 Caterpillar Part - WSTPARTS
Need a dependable Drivetrain part for your Caterpillar 305.5E2, 3412 and 345D machine? The 9Y1979 GASKET from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Drivetrain. Every unit is fitment-verified before dispatch. Manual reference: 3306: COOLING SYSTEM, group 030-7951, page 388; 3306: SERVICE EQUIPMENT AND SUPPLIES, group 155-1379, page 1886.
9Y1979 GASKET for Caterpillar 305.5E2 — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement GASKET (Part # 9Y1979). Designed for CAT 305.5E2, 3412, 345D equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 305.5E2, 3412, 345D
- ✔ 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) | 9Y1979 |
| Product Name | GASKET |
| Brand | CAT |
| Applicable Models | 305.5E2, 3412, 345D |
| 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 9Y1979 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 | COOLING SYSTEM | 030-7951 | p.388 |
| 3306 | AIR INLET AND EXHAUST SYSTEM | 030-7951 | p.576 |
| 3306 | AIR INLET AND EXHAUST SYSTEM | 030-7951 | p.578 |
| 3306 | AIR INLET AND EXHAUST SYSTEM | 030-7951 | p.579 |
| 3306 | AIR INLET AND EXHAUST SYSTEM | 030-7951 | p.581 |
| 3306 | SERVICE EQUIPMENT AND SUPPLIES | 155-1379 | p.1886 |
| 3306 | SERVICE EQUIPMENT AND SUPPLIES | 392-4479 | p.1891 |
| 3306 | SERVICE EQUIPMENT AND SUPPLIES | 461-3282 | p.1893 |
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.
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 9Y1979 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 305.5E2.
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
