A critical undercarriage component – a brand new top roller (carrier roller) by KERTRACK. Designed for a wide range of JCB JS series excavators (from JS120 to JS260), CASE excavators (9020, 9030), and many other machines. Its purpose is to support the upper section of the track chain, preventing it from sagging excessively and reducing vibration during travel. The roller is a maintenance-free, oil-filled assembly secured with heavy-duty seals.
KERTRACK is a world leader in high-quality undercarriage components. By choosing KERTRACK rollers, you are investing in technology that guarantees maximum service life, excellent wear resistance, and a precision fit, minimizing downtime and operating costs.
| Brand | Type / Series / Model |
|---|---|
| JCB | Tracked Excavators: JS115, JS120, JS130 (HD, LC), JS140, JS145 (LC), JS150 (LC), JS160 (LC, NLC), JS180 (LC, NLC), JS190 (LC, NLC), JS200 (FC, LC, NC, SC), JS205 (ASIA, CH, LRCH, RUSSIA, SCCH), JS210 (LC), JS220 (LC, LONG REACH, NC, SC), JS235, JS240 (LC, NLC, SC), JS255, JS260 (LC, LONG REACH, NLC, NLC-XD, SC), JZ140 (LC), JZ235, JZ255 |
| CASE | 9020, 9020B, 9030 |
| FIAT-KOBELCO / KOBELCO / MITSUBISHI | Fits many models in a similar operating weight class (verify by cross-reference). |
The list above is for reference. It is crucial to verify the OEM part number or roller dimensions.
Before working on the undercarriage, ensure the machine is on stable, level ground and properly secured. Replacing rollers requires working under the machine - you must use certified jack stands. Never rely solely on the machine's hydraulic jack.
Top rollers (carrier rollers) support the upper run of the track chain. They prevent the chain from sagging, striking the undercarriage frame, and reduce noise, vibration, and wear on the track links.
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A top roller (carrier roller) is located on top of the track frame and supports the weight of the returning, sagging section of the track. A bottom roller (track roller) is on the bottom and transfers the entire machine's weight to the track on the ground.
2. Is this roller maintenance-free?Yes. This roller is factory-filled with oil and equipped with durable, heavy-duty seals that provide lubrication for its entire service life. It does not require regular greasing.
3. My roller is seized, but the surface looks okay. Do I need to replace it?Yes, absolutely. A seized (non-rotating) roller acts as a brake on the track chain. This causes rapid, abrasive wear on both the roller (creating flat spots) and the track links, leading to a very fast and expensive failure of the entire undercarriage.
Have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you choose the right part to get your equipment back to work as soon as possible.
Data sheet
Specific References
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Roller track top suitable for JCB JS140-220 excavators.

















