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Caterpillar 307 B~D 308 B~D Aftermarket Idler

277-8667 Cat Idler
Rubbertrax
Caterpillar 307 B~D 308 B~D Aftermarket Idler
Buy aftermarket idlers for your Cat 307 B~D and 308 B~D online at Rubbertrax and save versus going to your Cat dealer. Save online and skip the trip to the dealer. This 277-8667 idler ships for FREE to your commercial address when you check out online.
SKU: 277-8667
Weight: 131 lbs
Make: Cat
Shipping: Fast and Free!
Price: $594.00

Rubber tracks and wear parts are sold individually unless specified in the details. We offer free shipping across the USA when you order online and ship to a commercial address. *Some restrictions apply.

277-8667 Tension Idler Assembly

This is the aftermarket idler for the Caterpillar 307 B~D and 308 B~D mini excavator. This idler is guaranteed to fit so order online with confidence.


This idler also fits the following models:

  • Caterpillar 307B (BNE BCM BAJ 4RW 5CW 6KZ 7DZ)
  • Caterpillar 307C (BNE BCM BAJ 4RW 5CW 6KZ 7DZ)Must Verify Serial, Alt. Option: 185-9162
  • Caterpillar 307D (CRW JPS HAS GBT FYC ECT DSG 3YS)
  • Caterpillar 307E
  • Caterpillar 307E2
  • Caterpillar 307CSB
  • Caterpillar 308B (CRW JPS HAS GBT FYC ECT DSG 3YS)
  • Caterpillar 308C (CRW JPS HAS GBT FYC ECT DSG 3YS)
  • Caterpillar 308 CCR Must Verify Serial, Alt. Option: 185-9162
  • Caterpillar 308D (CRW JPS HAS GBT FYC ECT DSG 3YS)

Alternate Part Numbers

  • Caterpillar® Dealer Part Number: 277-8667, 6I-488, 115-6336

Optional Part Availability

There are no known alternate part listings. This idler is guaranteed to fit if serial, model, and specs are confirmed. Some models may require the alternate part number 185-9162.

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.