Cummins 6CT / B,C SERIES / John Deere Belt Tensioner

OE C3936213 / 3976831 / 3976834 / 3957434 / 3565151

Aftermarket replacement for B2B importers, distributors, wholesalers and private-label programs.

Product category: Belt Tensioners
Brand application: Cummins / John Deere
OE references: C3936213 / 3976831 / 3976834 / 3957434 / 3565151
Application: Cummins 6CT / B,C SERIES / John Deere
Cross reference: DAYCO 89406 / GATES 38516 / SKF VKM910021

Confirm final specification and application before ordering.

PRODUCT OVERVIEW

ABOUT THIS BELT TENSIONER.

The TRUPA Cummins 6CT / B,C SERIES / John Deere Belt Tensioner is an aftermarket replacement belt tensioner referenced to OE numbers C3936213, 3976831, 3976834, 3957434, 3565151, with cross references DAYCO 89406, GATES 38516, SKF VKM910021. It is listed for Cummins 6CT / B,C SERIES / John Deere. TRUPA supplies it to importers, distributors, wholesalers and private-label programs, with China export supply and partner-warehouse support in the USA and Brazil for eligible orders.

WHAT IT DOES

A belt tensioner keeps the correct tension on the accessory (serpentine) belt that drives the alternator, water pump, fan and air-conditioning compressor. It uses a spring-loaded arm and an idler pulley to absorb belt stretch and vibration.

APPLICATION & FITMENT

Listed for Cummins 6CT / B,C SERIES / John Deere. More parts for Cummins, John Deere. Engine family: Cummins 6CT 8.3.

OE & INTERCHANGE NUMBERS

C3936213
3976831
3976834
3957434
3565151
DAYCO 89406
GATES 38516
SKF VKM910021

BEFORE YOU ORDER

OE and cross-reference numbers (for example Gates, Dayco or Continental)
Engine and truck model, as some tensioners are shared across brands
Pulley type (grooved or flat), diameter and arm direction

COMMON REPLACEMENT SIGNS

Belt squeal, slipping or chirping
Tensioner arm vibrating or bouncing at idle
Noisy or rough idler pulley bearing
Premature belt wear or the belt jumping off the pulleys

Read the troubleshooting guide →

QUALITY CHECKS

Spring torque, pulley bearing quality and arm pivot wear decide service life, so these are checked against the original part. How TRUPA approaches quality control.

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