| Part Name | Belt Tensioning Wheel Assembly |
| Part Number | 6240-61-4500 |
| Weight | 8.5kg |
| Material | Cast iron shell+spring steel spring |
| Compatible models | QSK23, 6D170-3 engines |
Main features:
The spring automatically adjusts the belt tension, compensates for belt elongation and looseness, eliminates belt slippage and abnormal noise, reduces belt loss, and stabilizes the cooling system transmission
Applicable scenarios:
Large excavators, mining engineering machinery, heavy-duty equipment engine cooling and transmission parts
Our address
No. 0753, 7th Floor, Ruima Mingmen Business Building, Liying Street, Rencheng District, Jining City, Shandong Province
Phone Number
19819057311
19819057311@163.com
FAQ
Q1: Which engines are compatible with part number 6240‑61‑4500 tensioner?
A: It fits QSK23 and 6D170‑3 engines, widely applied on Komatsu heavy‑duty construction machinery.
Q2: What symptoms will appear when the tensioner fails?
A: Belt slippage and abnormal noise, excessive belt bounce and accelerated wear. Malfunction of fan and water pump drive may easily lead to engine overheating.
Q3: Can I replace only the pulley bearing of this tensioner?
A: This is an integrated assembly. It is recommended to replace the complete tensioner to prevent secondary failures resulting from spring fatigue.
Q4: Is manual belt tension adjustment required during installation?
A: No. This is an auto‑tensioning unit. The built‑in spring maintains proper belt tension automatically, no manual adjustment is needed.
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