Technical Dimensions
| Part # | 172-2100 |
|---|---|
| Tooth Count | |
| Bolt Hole Count | |
| Auxiliary Holes | |
| Outside Diameter | |
| Inside Diameter | |
| Dish Depth | |
| Flange Diameter | |
| Drive Configuration | |
| Mount Configuration | |
| Stamped Part # | |
| Pitch | |
| Weight | 70.4 lbs |
CAT 303-5 Front Idler | Part #172-2100
Regular Price
$457.50
x 1
PRODUCT SPECIFICATIONS
Construction & Features
| Durability | Heavy duty only |
|---|---|
| Fitment | OEM-reference match |
| Construction | Drop forged steel |
| Finish | Heat-treated hardening |
Frequently Asked Questions
Fitment, availability, fulfillment, and support for this product
What front idler fits the Cat 303-5?
This front idler is listed for the Cat 303-5 and matches OEM Part #172-2100. Before ordering, compare your machine make, model, serial number, and existing part number to confirm the correct undercarriage position and fitment.
What bottom rollers fit the Cat 303-5?
Matching bottom roller or track roller options for the Cat 303-5 include CAT 303.5 Track Roller | Part #185-7280. Replacing worn rollers before installing new rubber tracks helps keep the undercarriage aligned and reduces uneven wear across the track carcass.
What top roller fits the Cat 303-5?
Matching top roller options for the Cat 303-5 include CAT 303.5 Carrier Roller | Part #146-6064. Top rollers support the upper track path and should be checked for bearing play, flat spots, and uneven wear during undercarriage service.
Should I inspect the full undercarriage before replacing this Cat 303-5 part?
Yes. Sprockets, idlers, rollers, and rubber tracks wear together as a system. Before replacing this part for the Cat 303-5, inspect the full undercarriage for uneven wear, bearing play, hooked sprocket teeth, and track tension issues.
How do I confirm this product fits the Cat 303-5?
Confirm fitment by checking your machine make, model, serial number, and existing track size or OEM part number. For rubber tracks, verify width, pitch, and link count. For undercarriage parts, compare the part number, bolt pattern, tooth count, and machine position. You can also use the TrackTECH Track Finder or call (850) 816-7898 before ordering.
How fast does TrackTECH ship Cat 303-5 parts?
TrackTECH ships rubber tracks and undercarriage parts quickly across the Lower 48. Heavy items typically ship by freight, while smaller undercarriage parts may ship by parcel depending on warehouse availability. Review TrackTECH shipping information or contact us before ordering if you need priority freight options.
What machines is this front idler listed for?
Current compatible equipment listed in the TrackTECH catalog includes CAT 303.5.
Where can I buy this front idler?
TrackTECH supplies new replacement front idler options with low direct pricing, free shipping and fast nationwide delivery. Current price and availability are shown on the product page.
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