Technical Dimensions
| Part # | KM1690 |
|---|---|
| Tooth Count | |
| Bolt Hole Count | |
| Auxiliary Holes | |
| Outside Diameter | |
| Inside Diameter | |
| Dish Depth | |
| Flange Diameter | |
| Drive Configuration | |
| Mount Configuration | |
| Stamped Part # | |
| Pitch | |
| Weight | 32.0 lbs |
Komatsu PC78US-8 / PC78US-10 / PC78US-11 Bottom Roller | Part #KM1690
Regular Price
$166.25
x 1
PRODUCT SPECIFICATIONS
Construction & Features
| Durability | Heavy duty only |
|---|---|
| Fitment | Direct OEM match |
| Construction | Drop forged steel |
| Construction | Heat-treated hardening |
Frequently Asked Questions
Fitment, availability, fulfillment, and support for this product
What bottom roller / track roller fits the Komatsu PC78US-11?
This bottom roller / track roller is listed for the Komatsu PC78US-11 and matches OEM Part #KM1690. Before ordering, compare your machine make, model, serial number, and existing part number to confirm the correct undercarriage position and fitment.
What rubber tracks pair with this bottom rollers?
Matching rubber track options connected to this Komatsu PC78US-11 undercarriage setup include <a href="/products/komatsu-pc78us-11-rubber-tracks">Komatsu PC78US-11 Rubber Tracks | 450x83.5Kx74 (Part #450X83.5KX74)</a>. If you are replacing this part, inspect the full undercarriage so the new component and rubber tracks wear evenly together.
Should I inspect the full undercarriage before replacing this Komatsu PC78US-11 part?
Yes. Sprockets, idlers, rollers, and rubber tracks wear together as a system. Before replacing this part for the Komatsu PC78US-11, inspect the full undercarriage for uneven wear, bearing play, hooked sprocket teeth, and track tension issues.
How do I confirm this product fits the Komatsu PC78US-11?
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 <a href="/pages/rubber-track-finder">TrackTECH Track Finder</a> or call <a href="tel:8508167898">(850) 816-7898</a> before ordering.
How fast does TrackTECH ship Komatsu PC78US-11 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 <a href="/pages/shipping">TrackTECH shipping information</a> or contact us before ordering if you need priority freight options.
What machines is this bottom roller listed for?
Current compatible equipment listed in the TrackTECH catalog includes Komatsu PC78US-10, Komatsu PC78US-11, Komatsu PC78US-8.
Where can I buy this bottom roller?
TrackTECH supplies new replacement bottom roller 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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