Belt Tensioner Compatible With 2008-2020 Caterpillar 434E/434F/442E/444E C4.4 4.4L Diesel Backhoe

CATERPILLAR BACKHOE LOADERS:
• Caterpillar 416E/416F/420E/420F/422E/422F C4.4 4.4L Diesel (2008-2020)
• Caterpillar 428E/428F/430E/430F/432E/432F C4.4 4.4L Diesel (2008-2020)
• Caterpillar 434E/434F/442E/444E/444F/450E C4.4 4.4L Diesel (2008-2020)

CATERPILLAR WHEEL LOADERS:
• Caterpillar 910K/914K/920K/924K/930K/938K C4.4/C6.6/C7.1 Diesel (2011-2020)

CATERPILLAR EXCAVATORS:
• Caterpillar 312D2/313D2/318D2L C4.4 4.4L Diesel (2012-2018)

CATERPILLAR TRACK-TYPE TRACTORS:
• Caterpillar D3K/D3K2/D4K/D4K2/D5K/D5K2 C4.4 4.4L Diesel (2008-2018)

CATERPILLAR WHEELED EXCAVATORS:
• Caterpillar M313D/M315D/M316D/M318D/M322D C6.6/C7.1 6.6/7.1L Diesel (2008-2017)

CATERPILLAR TELEHANDLERS:
• Caterpillar TH336C/TH337C/TH406C/TH407C/TH514C C4.4 4.4L Diesel (2008-2016)

CATERPILLAR MOTOR GRADERS:
• Caterpillar 120/140GC C7.1 7.1L Diesel (2014-2020)

CATERPILLAR COMPACTORS:
• Caterpillar CS-54B/CS-56B/CS-66B/CS-68B/CS-74B C4.4 4.4L Diesel (2010-2020)


IMPORTANT:
Fits Cat C4.4, C6.6, and C7.1 engines — these are Perkins 1104D/1106D/1106C derivatives. Perkins equivalent part numbers: T411130 and 2637A001. Cat alternate number: 2610406. 74mm grooved pulley for V-ribbed belt. If ordering by Perkins number, use T411130. If ordering by Cat number, use 377-9082.

Cat number format note: 377-9082, 3779082, and CA3779082 all reference the same part. Application range is very broad — backhoe loaders, wheel loaders, excavators, dozers, graders, telehandlers, compactors, and asphalt pavers across E/F series equipment.

Failure symptoms: belt squeal, alternator undercharging, water pump slippage causing overheating. Replace V-ribbed belt with tensioner.

⚠️ Cat and Perkins use different numbers for the same tensioner — verify which brand is on your engine plate.