CATEngine Parts

7Y1755 Gear-Ring — Cat 320C 320D

This gear ring is a crucial component of the engine's starting system, engaging with the starter motor to initiate crankshaft rotation. Manufactured to meet robust quality standards, it provides reliable engagement and durability compared to a worn ring gear that may exhibit chipped or broken teeth. Operators will typically hear a grinding noise or experience the engine failing to crank when the gear ring is damaged or excessively worn.

Gear-Ring – Part No 7Y1755 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

M IST.', };

Related CAT Parts

From the same category — may also be needed

1869285
Engine Parts Component
176-7705
Temperature Sensor
1243524
Piston As
421-5347
Solenoid Valve Group
1289278
Arm Cylinder Seal Kit
5w-3403-5w-3402
Air Filter 5W 3403

Browse all CAT Engine Parts →

Ship This Part To Your Location

DubaiSaudi ArabiaNigeriaKenyaSouth AfricaBangladeshMalaysiaGhanaQatarEgypt
India
MaharashtraGujaratTamil NaduRajasthanKarnatakaTelangana

Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeRing Gear
MaterialForged steel
ApplicationEngine starting system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The most common symptom of a worn or damaged ring gear is a loud grinding or clashing noise when attempting to start the engine. If the damage is severe, the starter motor may spin freely without engaging the gear, preventing the engine from cranking. Continued use with a damaged ring gear can lead to starter motor damage.

Installation Tip

Properly heat the new ring gear to the specified temperature before attempting to fit it onto the flywheel to allow for expansion. Ensure the gear is seated squarely and evenly on the flywheel to prevent binding.

Service Note

When replacing the ring gear, inspect the starter motor and flywheel for any signs of wear or damage that may have contributed to the failure.