CATEngine Parts

103-5287-1109458 Starter Motor — Cat 4M40 307

This is a high-torque starter motor designed to engage the engine's flywheel and provide the necessary rotational force to start CAT engines. Built to OEM standards, it offers reliable and powerful cranking, unlike a worn starter that may struggle to turn the engine over or fail to engage. Observable symptoms of a failing starter include a clicking sound when the key is turned, slow engine cranking, or no response at all.

Starter Motor – Part No 103-5287-1109458 – 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.

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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 TypeStarter Motor
MaterialSteel, copper windings, and durable solenoids
ApplicationEngine starting system
Service LifeReplace when cranking performance degrades or fails
CompatibilityCAT 4M40, Excavator 307, 306, 307
ConditionNew — OEM specification aftermarket

Failure Symptoms

An initial sign of a failing starter motor is a weak or slow cranking sound when attempting to start the engine. If ignored, the starter may eventually fail to engage the flywheel, resulting in a loud click or no sound at all when the ignition is turned. This can leave the equipment inoperable, preventing necessary work from being completed.

Installation Tip

Ensure the engine's flywheel ring gear is inspected for damaged teeth before installing the new starter. Make sure the starter mounting bolts are tightened securely to prevent vibration-related failures and ensure proper engagement.

Service Note

When replacing a starter motor, inspect the battery terminals for corrosion and ensure the battery is fully charged, as a weak battery can strain the starter.