KYB MSF340 Travel Motor Explained: What It Is and Which Excavators It Fits (Hitachi, Komatsu, Sany, John Deere and More)

Quick Answer

Key Takeaways

• MSF340 = a KYB travel (final drive) motor in the 340 size class.
• It is a dual-speed piston-type motor with a built-in parking brake — the two features that define its role.
• It is quoted for large excavators: Hitachi ZX670 / ZX870 / EX1200, Komatsu PC1250, Volvo EC700 / EC750 / EC950, Sany SY750 / SY950, XCMG XE800 / XE900.
• John Deere enters the picture through the shared Deere/Hitachi chassis on large machines — so a Deere of the same class can take the same motor family, but confirm by part number.
• The compatible-model list is a starting point; fitment must be confirmed by machine model, serial and the motor's own number.
• It is a heavy part: about 200 kg, packed 50 × 50 × 50 cm.

Table of Contents

• 1. What a Travel Motor Actually Is
• 2. What "MSF340" Tells You
• 3. What the MSF340 Does on a Big Machine
• 4. Which Excavators It Fits
• 5. The John Deere Connection
• 6. Why the Fitment List Is Not the Whole Answer
• 7. How to Confirm the Right Travel Motor
• 8. Buying Notes for a 200 kg Component
• 9. FAQ
• 10. Get Your Motor Confirmed

1. What a Travel Motor Actually Is

Every hydraulic excavator has two "families" of hydraulic consumers: cylinders, which push and pull in a straight line, and motors, which rotate. The travel motors are the ones that drive the tracks.

On a large machine the travel motor is not a small bolt-on — it is the final drive: a hydraulic motor combined with a gearbox and a brake, mounted at the track frame, converting hydraulic pressure into the slow, enormous torque needed to move 60–90 tonnes of steel up a grade.

That is why travel motors get attention out of proportion to their size: if they fail, the machine cannot reposition at all. In a quarry or on a mine bench, a machine that cannot track is a machine that cannot work. Complete travel assemblies are listed under excavator hydraulic parts.

2. What "MSF340" Tells You

Two points worth internalising:

• The manufacturer and the machine brand are different companies. KYB builds the motor; Hitachi, Komatsu, Volvo, Sany, XCMG or Deere build the machine. That is why you will always meet two layers of naming — the motor model and the machine maker's part number.
• The size class appears in other KYB designations too. You may see the same "340" figure in related KYB final-drive and motor numbering — a reminder that the number identifies a size bracket, not one single part.

3. What the MSF340 Does on a Big Machine

4. Which Excavators It Fits

The MSF340 is quoted for a broad group of large excavators. This is the compatibility list we publish for the part:

Notice what these machines have in common: they are all heavy-duty digging and mining class excavators, where the travel system has to survive constant repositioning under load. That is a large part of why this motor is a high-demand item — it is fitted to a lot of hard-working machines.

5. The John Deere Connection

Most compatibility lists stop at Hitachi and Komatsu. The Deere part of the story is worth understanding, because it explains why the same motor keeps appearing under yet another brand.

• 1. Deere and Hitachi shared platforms for decades. For more than thirty years the two companies partnered on excavators, and Deere's large machines were built on the shared Deere/Hitachi chassis — the 870 P-Tier, for example, an 85.6-tonne class machine, is described exactly that way.
• 2. That shared chassis is the same class as the Hitachi machines on this list. So a Deere machine of the same class as a ZX670 or ZX870 sits on the same platform family — which is why the same travel motor group can apply.
• 3. But the partnership ended. Deere and Hitachi concluded their joint venture in 2021–22, and later machines were built separately under each name. Late machines can therefore differ, even where the class looks the same.

The honest conclusion for a Deere owner: the same-class platform relationship is real, but it is a reason to check, not a reason to assume. Confirm with your machine's part number and the motor's own identification — exactly as you would for any other brand on the list.

6. Why the Fitment List Is Not the Whole Answer

A compatibility table is useful and incomplete at the same time. Here is why:

Read the list as "machines worth checking", not "machines this part definitely fits". That distinction is the difference between a one-order fix and a returned 200 kg crate. For the general method, see our guide to travel motor fitment; and if you are still deciding which component you need, start with travel motor vs swing motor.

7. How to Confirm the Right Travel Motor

1. Read the identification on the motor. Photograph the nameplate and any cast or stamped numbers on the housing — straight-on and in focus.
2. Record the machine model and serial number. The serial is what ties the machine to a specific build.
3. Photograph the whole unit from two or three angles, including the mounting flange, ports and the travel-speed connections.
4. Confirm with a supplier holding the cross-reference, who can check whether the MSF340 group applies and flag any supersession.

Those four items turn a well-meant guess into a confirmed order. Again: the motor's model gets you into the right family — the numbers on your machine get you the right part.

8. Buying Notes for a 200 kg Component

A travel motor is a high-value, high-downtime part. Four things are worth insisting on:

Before you order, also confirm the fault is really the travel motor. Travel problems can come from the motor itself, from the travel control circuit, or from a loss of flow and pressure upstream — and a motor replaced for a control fault will not fix the machine. If you are dealing with a machine that has lost power generally, the supply side is the first thing to rule out.

9. FAQ

Q1: What is an MSF340 travel motor?

It is a KYB (Kayaba) travel motor — also called a final drive motor — in the 340 size class, designed for large excavators in the 60–90 tonne range. It is a dual-speed piston-type motor with a built-in parking brake.

Q2: Which excavators use the MSF340?

It is commonly listed for Hitachi ZX670 / ZX870 / EX1200, Komatsu PC1250, Volvo EC700 / EC750 / EC950, Sany SY750 / SY950 and XCMG XE800 / XE900, plus same-class John Deere machines built on the shared Deere/Hitachi chassis. Confirm by part number before ordering.

Q3: Does the MSF340 fit John Deere excavators?

Deere's large excavators were built on the shared Deere/Hitachi chassis for decades, so a Deere of the same class can take the same motor family. The partnership ended in 2021–22, though, so later machines can differ — confirm with your machine part number.

Q4: Is MSF340 a part number I can order by?

It identifies the motor model and size class. The correct unit is confirmed by the numbers on your machine and on the motor itself.

Q5: What does "dual-speed" mean on this motor?

The travel motor can operate in two speed ranges: low speed with high torque for climbing and working in, and a higher speed for moving the machine between jobs.

Q6: Why is a built-in parking brake important?

It holds the machine on a slope when travel is not commanded. It is a safety function — on a heavy machine, an unbraked track is a hazard.

Q7: How heavy is the MSF340, and how is it packed?

About 200 kg, packed in a 50 × 50 × 50 cm case. Plan lifting equipment at both ends of the shipment.

Q8: What are the signs of a failing travel motor?

Weak or uneven tracking, drifting on slopes, one track lagging, unusual noise or heat, and loss of the high-speed range. Because several faults look similar, a pressure and flow check helps separate motor problems from supply and control problems.

Q9: Can I fit a travel motor from a different machine of the same class?

Do not assume it. Even within one size class, variants differ in gear ratio, mounting, ports and travel-speed arrangement. Verify against your machine's part number.

Q10: What should I send to get the right motor?

Machine model, machine serial number, the identification from the motor itself, and two or three clear photos including the mounting flange and ports.

10. Get Your Motor Confirmed

Send us your machine model, serial number and the identification from the motor — plus a few clear photos — and our team will confirm whether the MSF340 applies to your machine, flag any supersession, and quote lead time the same day. RITO HYDRAULIC supplies complete, individually tested travel motors, main pumps, control valves and swing motors for Hitachi, Komatsu, Volvo, Sany, XCMG, Kobelco, Caterpillar, Hyundai, Doosan and Kawasaki-series machines — with export packing and a 6–12 month warranty.

Contact our team or learn more about RITO HYDRAULIC.