CATEngine Parts

1B8736 Woodruff Key — Cat 320C 320D

This is a Woodruff Key, a small, semi-circular metal key used to lock a shaft (like a crankshaft or camshaft) to a rotating component (like a pulley or gear), preventing relative rotation. It is manufactured from hardened steel to withstand the significant torsional forces within an engine, ensuring precise timing and power transfer, unlike a worn or sheared key which can cause timing issues. A failed Woodruff key will typically result in a sudden loss of power or the engine not starting, as the component it secures will no longer be driven.

Woodruff Key – Part No 1B8736 – 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 TypeWoodruff Key
MaterialHardened steel
ApplicationShaft and component locking
Service LifeDesigned for permanent installation unless sheared
CompatibilityCAT 320C, 320D, 323D, 325D, 329E
ConditionNew — Aftermarket

Failure Symptoms

A sheared or missing Woodruff key typically results in an immediate and complete loss of power transmission from the shaft it was securing. The engine may continue to run, but the component (e.g., a gear or pulley) will no longer rotate with the shaft. This can lead to the engine stopping abruptly or failing to start if a critical component like the camshaft or crankshaft timing gear is affected.

Installation Tip

Ensure the keyway in both the shaft and the component is clean and free of debris for a proper fit. Do not attempt to force the key into place; it should slide in smoothly if alignment is correct.

Service Note

When replacing a Woodruff key, inspect the corresponding keyways in the shaft and the component for any signs of damage or excessive wear.