Caterpillar 304.5 305.5 Idler 240-6304

Our Products: Cat Mini Excavator > Caterpillar 304.5 305.5 304CR 305CR
SKU: 240-6304
Weight: 88 lbs
Buy the aftermarket Caterpillar 304.5, 305.5 replacement tension idler assembly online at Rubbertrax and save time and money. This is a complete replacement idler fully assembled.
Price: $665.00
Please visit Rubbertrax.com for online checkout.
240-6304 Cat Idler
Caterpillar 304.5 305.5 Idler 240-6304
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New undercarriage parts and rubber tracks are sold individually but we suggest replacing all of your worn parts at the same time.

This is the aftermarket replacement tension idler designed for the following Caterpillar® mini excavators:


  • Caterpillar®304
  • Caterpillar®304CR
  • Caterpillar® 304.5
  • Caterpillar®305
  • Caterpillar®305.5
  • Caterpillar®305.5E
  • Caterpillar®305CR
  • Caterpillar®306
  • Caterpillar®306E

CLEARANCE PRICE, NO WARRANTY. Cannot be combined with any other offer.


This is the larger idler roller on the opposite end of the undercarriage from the sprocket. There are two idlers per machine, one on each side.

Must Ship Freight Carrier

Due to the weight of this idler it must ship via freight truck on a pallet. Do not choose the Fedex Ground option or it will delay your order.



Alternate Part Number:
Cat dealer part number:
240-6304, 240-6302, 353-5578
Alternate Models:
Caterpillar: 304, 304CR, 304.5, 305, 305.5, 305.5E, 305CR, 306, 306E
Alternate Part: There are no known alternate part listings. This idler is guaranteed to fit.

Rubbertrax now carries the complete undercarriage for the Caterpillar® 304.5 mini excavator including the rubber tracks.

Related Caterpillar 304.5 Undercarriage Parts

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