This OEM VG1246060005 automatic belt tensioner assembly is a heavy-duty engine accessory exclusively designed for Sinotruk HOWO A7 WD12/D12 and Shacman heavy truck engines, strictly manufactured to OEM dimensional and performance standards for direct plug-and-play installation without modification.
The tensioner housing adopts high-strength ADC12 aluminum alloy die-casting, paired with wear-resistant rubber pulley and high-precision silent bearing, featuring excellent heat resistance, vibration resistance and anti-fatigue performance, adapting to long-time high-load operation under high-temperature engine compartment environment. Built-in constant pressure spring structure can automatically compensate belt elongation caused by long-term use, keeping the drive belt at optimal tightness all the time.
It effectively avoids common faults such as belt slipping, power transmission loss, abnormal squeaking and premature belt fracture, stabilizing the working efficiency of cooling fan, water pump and generator, and prevents engine overheating and electrical system failure. Precision machined mounting holes perfectly match the original engine installation position, stable and firm after assembly without shaking or deviation.
It is the ideal replacement part for failed, loose or worn original tensioners during engine overhaul and daily maintenance, widely supplied to truck repair workshops, logistics fleet maintenance stations and global heavy truck spare parts wholesalers. We implement strict pre-delivery quality inspection, sufficient spot inventory and competitive factory wholesale prices for worldwide buyers.
