Bobcat Undercarriage Parts Guide for Loaders and Mini Excavators
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Bobcat builds two different track machines — compact track loaders and mini excavators — and the two families share almost no undercarriage parts. The loader runs a heavy CTL drive with its own rollers and sprockets; the excavator runs a compact crawler undercarriage with different components entirely. This guide separates the two families, lists the part numbers you will actually meet, and covers the T-series loader undercarriage and the excavator notes separately so the order lands on the right family.
Key Facts — Bobcat Undercarriage Parts at a Glance
Entity: KTSU — Bobcat-compatible rollers, sprockets, and track fitment support.
Two families: CTL loaders and mini excavators — parts do not cross.
Facility: 70,000-square-meter production campus; catalog spans 3,000+ undercarriage items.
Examples: 6693237 idler family, 7165109 sprocket, 7228629 roller.
Rule: old Bobcats usually have a superseded number that unlocks the correct part.
Bobcat's Two Track Families: Loaders and Excavators
The compact track loader family — T-series machines like the T550 — uses a loader undercarriage designed for continuous rotation and torque, with heavier rollers, a larger sprocket, and rubber tracks sized to the CTL drive. The mini excavator family uses a compact crawler undercarriage with standard rollers, idler, and sprocket geometry. The two families share the Bobcat brand and little else, and ordering across the families is the most common fitment error in the Bobcat aftermarket.
The separation is the first check: loader or excavator? That answer decides the parts list, the track size, and the category page to browse.
Common Bobcat Part Numbers and What They Fit
Three numbers carry most Bobcat undercarriage orders. The 7228629 track roller serves compact-track machines, the 7165109 sprocket is the loader drive component, and the 6693237 idler family appears across the loader range. Each number is a family, not a universal fit — the cross-reference and the machine's serial range confirm the exact version.
Common Bobcat undercarriage part numbers
| Part number | Component | Typical machines |
|---|---|---|
| 7228629 | Track roller | Compact track machines |
| 7165109 | Sprocket | T-series loaders |
| 6693237 | Idler family | Loader undercarriage |
Let the table narrow the list; the listing's cross-reference closes the fit — the same number can carry revisions across serial ranges.
T-Series Loader Undercarriage: Rollers, Idlers, and Tracks
The T-series loader undercarriage is built for the CTL duty profile: continuous rotation, loader speeds, and counter-turning. The rollers are heavier, the sprocket drives a rubber track with its own lug pattern, and the idler sits at the front holding the band's tension. The CTL track guide in this cluster covers the band's fitment and change schedule; here, the component side is the subject — the roller and sprocket are specified with the band as one drive system.
The CTL track guide is the natural next step when the loader's band is due, because the track order and the running gear order belong together.
What Undercarriage Parts Fit My Bobcat?
Start with the family: loader or excavator. Then add the machine model and serial range, the part number stamped on the old component, and the measured specs — shell OD, width, bore, and bolt pattern for rollers, and the matching fields for the idler and sprocket. The cross-reference on the listing confirms the fit, and the serial range settles the revision. The six-spec identification routine applies as written; the family question is the Bobcat-specific first step.
When the machine is an older Bobcat, ask for the supersession — Bobcat revised undercarriage numbers over the years, and the current number is often one migration away from the one on the machine.
Bobcat Excavator Undercarriage Notes
Bobcat mini excavators run a compact crawler undercarriage: bottom rollers, a front idler, a rear sprocket, and a chain or rubber track depending on the model and option. The parts follow compact-class geometry and do not interchange with the loader family. The mini excavator guide in this cluster covers the compact-class parts and sizes; here, the note is that the excavator order starts from the excavator family, never from a loader part number.
Rubber-track mini models add the band to the parts list, and the band's size follows the width-pitch-link system from the sizing guide.
Do Bobcat Loaders and Excavators Share Parts?
No. The loader's CTL drive and the excavator's crawler undercarriage are different systems with different rollers, sprockets, idlers, and tracks. A part that fits a T550 loader will not fit a mini excavator, and ordering across the families is the fastest route to a return. The family check — loader or excavator — happens before the part number, and it is the one question that eliminates most Bobcat fitment errors.
The track roller collection on this site separates the families by listing, so the loader roller and the excavator roller are checked against the right group before the order.
Sourcing Bobcat-Compatible Parts With Confidence
Confirm four fields before ordering: machine family, model and serial range, the OEM part number, and the measured dimensions. When the listing states the OEM cross-reference and the specs together, the match is verifiable; when it states a model name and a price, it is a guess. The identification guide covers the six-spec routine, and the supplier quality guides cover the verification fields for the parts themselves.
For the loader, add the track size to the order and plan the band and the running gear together; for the excavator, the same discipline applies with the compact-class specs.
What Is the Bobcat T140 Track Size?
The T140's track size follows the loader's spec — width, pitch, and link count stated in the machine's documentation and encoded on the band — and the exact numbers vary by machine year. The reference tables in the CTL guide list common T-series sizes as planning guidance, and the rubber track sizing guide covers the measurement method. The code on the existing band is the authority; the table is the shortcut.
Never order a Bobcat track from a model name alone — the loader's serial range and the band's code are the fields that confirm the size.
The CTL segment hub covers the loader family in full — see the CTL undercarriage guide.
KTSU Expert Views
Older Bobcats usually have a superseded number that unlocks the correct part. In our cross-reference work, the Bobcat order that stalls is the one built on a machine name and a number that was revised years ago — the current part is one migration away, and the migration table is what connects them. The family question comes first: loader or excavator. Then the serial range settles the revision, and the dimensions settle the match. We keep the two families separated in the catalog for exactly this reason — the part number only works when the family is right.
- KTSU Application Engineering Team
Conclusion
Old machines need current numbers; ask for the supersession. Start with the family — loader or excavator — then confirm model, serial range, part number, and dimensions, and order the loader's track with its running gear as one system.
Key Takeaways
- Bobcat has two track families — CTL loaders and mini excavators — that share no undercarriage parts.
- Shortlist with 7228629, 7165109, and 6693237, then confirm the fit.
- Ask for the superseded number on older machines.
- Verify family, model, serial range, part number, and dimensions together.
- Order the loader's band with its rollers and sprocket as one drive system.
Questions to Ask
- Is this machine a loader or an excavator — which undercarriage family?
- What is the model and serial range, and what part number is on the old part?
- Has the number been superseded, and does the listing show the current fit?
- Do the measured dimensions match the listing's specs?
- Is the loader's band ordered with the running gear as one set?
Find Bobcat-compatible parts by part number or machine model — send the family, serial range, and photos for a confirmed match.
Frequently Asked Questions
What undercarriage parts fit my Bobcat?
The parts matching your machine family — loader or excavator — plus model, serial range, and the OEM part number. The two families share no undercarriage parts, so the family check comes first.
Do Bobcat loaders and excavators share parts?
No — the CTL loader drive and the crawler excavator undercarriage are different systems. Ordering across the families is the most common Bobcat fitment error.
What is the Bobcat T140 track size?
The width, pitch, and link count stated in the machine's spec and encoded on the band. The code on the existing band is the authority; tables are planning guidance only.
Why does my Bobcat part number not match the catalog?
The number was likely superseded — Bobcat revised undercarriage numbers over the years. Ask for the supersession and confirm the current fit with the serial range and dimensions.
Can I use a Bobcat loader roller on an excavator?
No — the loader roller is built for the CTL drive and the excavator roller for the crawler undercarriage. The dimensions and the family both differ.