TM40 Travel Assembly (Final Drive): Cross-Brand 20-Ton Excavator Guide & Bolt Pattern Matching (2026)

Quick Answer

Key Takeaways

• The TM40 is a multi-brand travel assembly — one unit covers Hyundai, Doosan, Volvo and Chinese 20-ton excavators, which is why matching bolt patterns matters more than brand name alone.
• Track-side holes: 30 holes / 36 mm. Sprocket hub holes: 30 holes / 63 mm — but SH200-1 and R210-7 use a 22-hole hub pattern.
• High torque output gives strong, stable travel on steep slopes, mud and rough terrain — performance you feel when working in poor conditions.
• The integrated two-speed and parking brake deliver smooth starts and stops, which protects both the operator and the machine's drive line.
• High assembly precision and wear-resistant construction mean a lower failure rate over the unit's service life.
• Always confirm: machine model + serial, current drive's bolt pattern, and final drive mounting before ordering — even within "20-ton" class, variants exist.

Table of Contents

1. 1. What a Travel Assembly Does — and Why TM40 Is Different
2. 2. TM40 Travel Assembly Data
3. 3. The Cross-Brand Advantage: One Drive, Many Machines
4. 4. Why Bolt Patterns Are the Real Compatibility Key
5. 5. Track Drive Symptoms: When the TM40 Needs Replacing
6. 6. What High Torque Feels Like in the Field
7. 7. Installation & Commissioning for a Travel Drive
8. 8. Maintenance That Extends Final Drive Life
9. 9. FAQ
10. 10. Get Your TM40 Travel Assembly Quote

1. What a Travel Assembly Does — and Why TM40 Is Different

The travel assembly (final drive) is the unit that turns the excavator's track: a hydraulic motor drives a planetary gear reduction that spins the drive sprocket, which pulls the track. On a 20-ton excavator, the travel drive must handle the machine's full weight while moving across slopes, mud and rough ground — and it does this for thousands of hours under constant shock loads.

What makes the TM40 different from a machine-specific drive is its cross-brand design: it is engineered to the common mounting geometry shared by several 18–25 ton machines. For owners and dealers who work across multiple brands, this means one reliable stock unit can cover several machines — provided the bolt patterns match. That is the central idea this guide explains.

2. TM40 Travel Assembly Data

3. The Cross-Brand Advantage: One Drive, Many Machines

Owners of a single-brand fleet choose a machine-specific drive. But dealers, rental fleets and rebuild shops often maintain several brands in the same tonnage class — and that is where the TM40 earns its keep:

• Simplified stocking — one TM40 unit in the parts room covers R210-7, DX225, EC210B and several Chinese-market machines instead of three separate drives.
• Faster turnaround — when a 20-ton machine goes down, the cross-brand unit is more likely to be in stock than a rare single-machine part number.
• Cost advantage — cross-brand production volumes lower per-unit cost versus low-volume machine-specific drives.

The trade-off is discipline: because one drive covers many machines, you must verify the bolt pattern and mounting for your specific machine — never assume compatibility from the model name alone.

4. Why Bolt Patterns Are the Real Compatibility Key

The TM40's specification sheet lists the exact geometry that determines fit:

• Track-side mounting holes: 30 holes / 36 mm — this pattern bolts to the track frame.
• Sprocket hub holes: 30 holes / 63 mm — this pattern bolts to the drive sprocket.
• Exception: SH200-1 and R210-7 use a 22-hole sprocket hub pattern — not the standard 30-hole version.

Before ordering, measure or confirm the hole pattern on your existing drive. A quick visual check of the sprocket hub — counting the bolt holes — takes two minutes and prevents a compatibility mistake that could otherwise delay the whole job.

5. Track Drive Symptoms: When the TM40 Needs Replacing

6. What High Torque Feels Like in the Field

The TM40's high torque output is not a spec-sheet number — operators feel it every shift:

• Steep slopes — the machine climbs without the track slipping or the drive labouring.
• Mud and soft ground — strong, steady pull keeps the machine moving instead of digging itself in.
• Complex conditions — reversing on loose rock, swinging while repositioning, and start-stop cycles all feel controlled rather than jarring.
• Two-speed operation — the integrated two-speed gives fast repositioning on flat ground and high torque when it matters, automatically.

When a worn travel drive is replaced with a healthy assembly, the difference is immediate: quieter travel, smoother direction changes, and no more one-sided pull.

7. Installation & Commissioning for a Travel Drive

1. Support the track frame safely; use a proper lifting point on the drive — never sling through the hydraulic ports.
2. Count the sprocket hub holes (30-hole or 22-hole) and confirm the track frame hole pattern before fitting.
3. Clean the mounting faces and inspect the sprocket and track frame for wear before assembly.
4. Fit the drive, torque mounting bolts in a criss-cross pattern to spec.
5. Fill with the correct gear oil grade and quantity; check after the first operation.
6. Test travel both directions slowly, then on a slope, verifying the parking brake holds.

8. Maintenance That Extends Final Drive Life

• Check final drive oil level and condition at every service — low oil is the fastest killer of planetary gears.
• Replace drive oil at the OEM-recommended interval; use the correct grade for your climate.
• Inspect sprocket teeth and track tension regularly — a loose track accelerates drive wear.
• Watch for leaks early: a small seal weep becomes a major failure if ignored.

9. FAQ

Q1: What is the TM40 travel assembly used for?

The TM40 is a complete final drive for 18–25 ton excavators, converting hydraulic motor power into the track's drive torque through a planetary reduction.

Q2: Which excavators does the TM40 fit?

It is engineered for the common mounting of Hyundai R210-7, Doosan DX225, Volvo EC210B and Chinese 20-ton machines including Sany, XCMG and LiuGong. Always confirm your machine's bolt pattern — SH200-1 and R210-7 use a 22-hole sprocket hub.

Q3: How do I know if my TM40 will fit my machine?

Check three things: the track frame hole pattern (30 holes / 36 mm), the sprocket hub holes (30 or 22 holes / 63 mm), and the mounting face. Count the holes on your current drive and confirm with your supplier.

Q4: What are the symptoms of a failing travel drive?

Weak or slow travel on one side, grinding or whining noise, parking brake creep on slopes, and oil leaks at the drive are the main warning signs.

Q5: How heavy is the TM40 travel assembly?

The unit weighs approximately 298 kg and packs at 52 x 52 x 60 cm — plan lifting equipment and freight accordingly.

Q6: Where can I buy a TM40 travel assembly?

RITO HYDRAULIC supplies the TM40 complete travel assembly with high torque output, integrated two-speed and parking brake, and export packing. Send your machine model, serial number and current drive bolt pattern for a same-day quote.

10. Get Your TM40 Travel Assembly Quote

The TM40 travel assembly keeps your 20-ton excavator moving through slopes, mud and the toughest site conditions. With cross-brand coverage, high torque output and an integrated two-speed and parking brake, it is the practical choice for owners, dealers and rental fleets running several machine brands.

RITO HYDRAULIC supplies travel assemblies, swing motors, hydraulic pumps and final drives for excavators worldwide. Send your machine model, serial number and the bolt pattern of your current drive — we will confirm the correct match, stock and lead time the same day.