1721965 Sprocket Fits Caterpillar Models
1721965 Sprocket Fits Caterpillar Models
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One New Aftermarket Replacement Drive Sprocket for Caterpillar (Cat) Mini Excavators
This aftermarket replacement drive sprocket fits the Caterpillar (Cat) 303.5 and E303.5 mini excavator undercarriage system. The drive sprocket engages the track link assembly to transmit power from the travel motor into forward and reverse machine movement. Replaces OEM Caterpillar part number 172-1965 (also written as 1721965).
Specifications
- Teeth: 21
- Bolt Holes: 9
- Weight: Approx. 17 lbs
Compatible Models
Caterpillar (Cat) Mini Excavators: 303.5, E303.5
IHI Mini Excavators: 25-J, 28-J, 30-J, 30-JX, 35-J, 35-JX
Sumitomo Mini Excavators: SH-30-J
Note: The Caterpillar 303.5 series includes multiple sub-models (C, CR, CCR, D, DCR and others). Verify your exact model number against your machine serial plate before ordering, as some sub-model variants may use different undercarriage components.
Replaces Part Number(s):
172-1965, 1721965
New aftermarket replacement part - not remanufactured, not used.



