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Caterpillar 300.9D Tension Idler 373-1851

Cat Bottom Roller 300.9D 373-1851
Rubbertrax
Caterpillar 300.9D Tension Idler 373-1851
Buy aftermarket tension idlers for your Caterpillar 300.9D online at Rubbertrax to save time and money. This roller is known as original part number 373-1851 from the dealer which has been superseded by part number 527-3879. Save online and skip the trip to the dealer. This 373-1851 / 527-3879 idler assembly ships free when you check out online.
SKU: 373-1851
Weight: 26 lbs
Make: Cat
Price: $160.00
Availability: Currently Out of Stock

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.

373-1851 Idler Assembly

This is the premium aftermarket tension idler for the following Caterpillar® mini excavator models:

  • Cat® 300.9D S/N LJM, LJ2
  • Cat® 300.9D VPS S/N TGP, DW2

Tension idlers install on the opposite end of the undercarriage as the sprocket and help maintain tension on the rubber track to prevent de-tracking. If your rubber track is frequently falling off from the rear of the machine, that is a sign that your idler is worn down and needs to be replaced.



Alternate Cat Part Numbers

  • Caterpillar® Dealer Part Number: 373-1851 527-3879

Optional 300.9D Idlers

There are no known alternate part listings. The 373-1851 superseded by the 527-3879 idler assembly is guaranteed to fit the serial breaks listed.