Buying a used compact track loader is not just a question of engine hours and paint. The undercarriage can represent a large share of the machine's immediate maintenance exposure, and wear is often uneven from side to side.
Evaluating a used CTL?
Identify the exact machine, inspect the rubber and steel, then use the machine collection to price the parts that are actually worn.
Start with the machine identity
Record the make, exact model and serial number before evaluating the undercarriage. Many CTLs have multiple track widths or serial-sensitive sprocket/idler/roller part numbers. A model name alone may not tell you the exact parts bill.
1. Inspect both rubber tracks
Do not estimate remaining life from tread depth alone. Look at the entire belt and compare left to right.
- Tread: compare depth and wear pattern across both sides.
- Sidewalls: inspect for cuts, chunking, deep cracking and contact damage.
- Drive lugs: look for tearing, rounding, missing material and uneven engagement marks.
- Internal guides: inspect for one-sided wear, breakage and signs the track has been walking off line.
- Reinforcement: exposed internal reinforcement or severe structural damage is a replacement warning.
- Matching pair: note whether the two tracks are the same size, tread and apparent age.
2. Read the molded track size
Write down the full width × pitch × link count from both sides. If the machine is supposed to have a 320x86x49 track but one side is marked differently, resolve that before assuming the machine just needs a new pair.
If the marking is gone, use How to Identify a Rubber Track When the Size Marking Is Gone.
3. Inspect the sprockets
Look at tooth shape and how the teeth contact the drive lugs. Warning signs include:
- Hooked or swept-back tooth profile
- Sharp or pointed tips
- One-sided or uneven wear
- Broken teeth
- Fresh damage on the track's drive lugs
Do not assume sprockets need replacement based on hours or “every other track set.” Compare actual wear with the machine manufacturer's service criteria.
4. Check every bottom roller
Inspect for oil leakage, bearing play, binding, damaged flanges and obvious flat spots. A single seized roller can create localized heat and accelerated belt wear. Compare the wear pattern across the row—one roller that looks very different from the rest deserves attention.
5. Inspect front and rear idlers
Check for side play, seal leakage, flange damage and alignment. Idlers are part of both track guidance and tension. Excessive play can contribute to de-tracking and one-sided guide wear.
6. Check the tensioner / grease adjuster
Ask whether the adjuster moves through its normal range and holds position. Do not use a generic sag number across every brand/model. Track tension should be checked using the machine manufacturer's procedure and conditions.
7. Look for alignment evidence
Uneven sidewall polishing, one-sided guide wear, repeated de-tracking scars, bent guards or asymmetric roller wear can point to frame or undercarriage alignment issues.
8. Drive the machine in both directions
During a safe test, listen and feel for:
- Ratcheting or popping under load
- Grinding or bearing noise
- One side tracking differently
- Track walk during turns
- Abnormal vibration
If a track ratchets, see Rubber Track Ratcheting or Skipping Under Load. If it repeatedly walks off, see Why Does My Rubber Track Keep Coming Off?.
9. Price the actual machine—not a generic rebuild
Once you know what is worn, use the exact machine collection to price the current tracks and cataloged undercarriage components. A healthy roller does not need replacement just because the track is worn; a hooked sprocket should not be ignored just because the machine still moves.
High-value machines to inspect by exact collection
- Bobcat T650
- Bobcat T770
- CAT 259D3
- CAT 289D3
- Kubota SVL75-2
- Kubota SVL97-2
- John Deere 331G
- John Deere 333G
Used CTL purchase checklist
| Area | What you want to know |
|---|---|
| Machine identity | Exact model + serial/configuration |
| Tracks | Exact size, structural condition, matching pair, wear pattern |
| Sprockets | Tooth profile and engagement quality |
| Rollers | Leakage, play, binding, flange wear |
| Idlers | Play, leakage, alignment, flange condition |
| Tension system | Adjustment travel and ability to hold the manufacturer-specified tension |
| Frame / guards | Damage, contact points, packed debris, alignment evidence |
| Driving test | No ratcheting, grinding, de-tracking or abnormal vibration |
After you buy the machine
Establish a known baseline: record the track size, inspect the complete undercarriage, correct any active wear problem, and save the machine in your fleet/parts workflow. If the tracks need replacement, choose tread for the work the machine will actually do.
Then read Bought a Used Skid Steer or CTL? What Replacement Tracks Should You Buy?.
Quick Buying Answers
Which rubber track rides the smoothest? For a verified fitment that offers it, Multi-Bar is usually the first tread to compare when lower vibration and smoother travel matter most.
Which track lasts longest on pavement? On asphalt and other hard, relatively flat surfaces, Multi-Bar is a strong first choice because it spreads contact across more tread bars. For harsher abrasive work such as broken concrete, rock, or demolition debris, compare a heavier C-Block or Staggered Block pattern instead.
What is the best track for paving? Start with Multi-Bar when ride quality, steady contact, and hard-surface travel are priorities. Confirm that the exact pattern is available for your machine before ordering.
What is the most affordable track? Price depends on the exact width, pitch, link count, guide type, and tread. Once fitment is confirmed, compare the live compatible options rather than changing dimensions just to save money.
What about mud, snow, or soft ground? Zig-Zag is usually the better pattern to compare when cleanout and bite matter more than pavement manners.