CATEngine Parts

377-9087 Belt Tensioner — Cat 416E 416F

This is a belt tensioner assembly that automatically maintains the correct tension on the engine's accessory drive belt. It is engineered with durable spring mechanisms and high-quality bearings to ensure consistent belt pressure, unlike a worn tensioner with a weak spring or seized bearing. Symptoms of a failing tensioner include a squealing noise from the belt area, premature belt wear, or the belt slipping off the pulleys.

Belt Tensioner – Part No 377-9087 – 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 TypeBelt Tensioner Assembly
MaterialSteel and composite
ApplicationEngine accessory drive belt system
Service LifeReplace every 100,000 miles or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A worn belt tensioner may initially produce a chirping or squealing sound, especially on startup or under load. If left unaddressed, the belt can begin to slip, leading to intermittent loss of power to accessories like the alternator or water pump. Continued operation with a faulty tensioner risks the belt coming off entirely, disabling critical engine functions.

Installation Tip

Before removing the old tensioner, note the position of the belt and any routing guides. Ensure the new tensioner pivots freely and is correctly seated before applying belt tension.

Service Note

Inspect the condition of the accessory drive belt and all pulleys for wear or damage when replacing the belt tensioner.