VolvoEngine Parts

ECS012952 — Belt Tensioner 20491753 For Volvo Engine D12D Excavator Ec330B Ec360B Ec460B Ec700B Truck Fh Fh16

This belt tensioner is a crucial part of the engine's accessory drive system, maintaining optimal tension on the serpentine belt to ensure proper operation of components like the alternator, power steering pump, and air conditioning compressor. Manufactured with durable spring mechanisms and bearings, it provides consistent belt tension unlike a worn tensioner that allows belt slippage. Operators may notice a squealing noise from the belt, premature belt wear, or a lack of charge from the alternator if the tensioner is failing.

Belt Tensioner 20491753 For Volvo Engine D12D Excavator Ec330B Ec360B Ec460B Ec700B Truck Fh Fh16 – Part No ECS012952 – Volvo Spare Part
Part Specifications
BrandVolvo
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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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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
MaterialSteel and composite
ApplicationEngine accessory drive system
Service LifeReplace every 100,000 miles or as needed
CompatibilityVolvo 20491753
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a faulty belt tensioner is often an audible squealing or chirping noise from the accessory drive belt, especially on startup or under load. If ignored, the tensioner may lose its ability to maintain proper belt tension, leading to belt slippage, reduced accessory function, and accelerated belt wear. Continued operation with a failing tensioner risks the belt coming off entirely, disabling critical systems like power steering and engine cooling.

Installation Tip

Ensure the serpentine belt is routed correctly around all pulleys before applying tension with the new tensioner. Do not use excessive force when retracting the tensioner arm to install the belt, as this can damage the internal spring mechanism.

Service Note

Always replace the serpentine belt when replacing the belt tensioner to ensure optimal performance and prevent premature wear on the new components.