This is the aftermarket sprocket for the Caterpillar 307B, 307C and 308C mini excavator. This sprocket has twelve bolts and twenty one drive teeth. If your sprocket is 23 teeth you may have an alternate serial break Cat 307 sprocket (51-9336).
It is always important to change your undercarriage parts and rubber tracks at the same time to maximize the life span of the tracks and parts and get the optimal wear.
This sprockets (130-9326) is known to fit:
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