CATUndercarriage

2W8494 Pulley-Alternator — Cat 3126B 3176B

This is a high-quality Alternator Pulley designed to drive the alternator and charge the battery system on Caterpillar engines. Manufactured to precise specifications, it ensures optimal belt grip and longevity, unlike a worn pulley with a damaged groove. Operators may notice a lack of battery charging, a dimming battery warning light, or a squealing noise from the belt when this component is failing.

Pulley-Alternator – Part No 2W8494 – CAT Spare Part
Part Specifications
BrandCAT
CategoryUndercarriage
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

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Installation & Application Notes

Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.

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

Part TypeAlternator Pulley
MaterialSteel
ApplicationEngine charging system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first sign of a failing alternator pulley is often a persistent squealing sound from the engine bay, especially under load, or a battery warning light indicating insufficient charging. If the pulley seizes or the belt slips excessively, the alternator will stop charging, leading to battery depletion and potential engine shutdown. Continued operation risks damaging the accessory belt and alternator bearings.

Installation Tip

Ensure the new pulley is correctly aligned with the crankshaft pulley and any other accessory pulleys before tightening the mounting bolt. Do not overtighten the pulley bolt, as this can damage the alternator shaft.

Service Note

Inspect the condition of the alternator belt and the alternator bearings for wear or damage when replacing the pulley.