C3937553 Cummins 6BT Tensioner Wheel 4110000331017

Part Name: Automatic Belt Tensioner
General Models: C3937553, 3937553
Replacement Numbers: 3914086, 5333477, 3934818
Material: Cast iron bracket + rubber wheel + built-in strong spring
Function: Automatically adjusts the tension of fan/generator/air conditioning belts, preventing slippage and abnormal noise
II. Compatible Engines and Models
Engine:
4BT3.9, 6BT5.9, 6BTA5.9 (125-210 hp)
6CT8.3, 6CTA8.3 (240-300 hp)
Applicable Equipment: Dongfeng Tianlong, Tianjin, 153 Heavy Trucks
Construction Machinery: Komatsu PC200-6/7, Liugong/Longgong 50 Loader
Dongfeng Mengshi Off-Road Vehicle

IV. Replacement Instructions

Fault Symptoms: Abnormal belt noise, slippage, belt misalignment, loose tensioner/oil leakage

Replacement Points:

Check belt wear; it is recommended to replace the belt simultaneously.

Ensure the pulley surface and belt are perfectly aligned during installation.

Check the idler pulley and water pump bearings for damage.