MSF-340VP-EH6 MSF-340VP-EH7 MSF-340VP-EH1 Final Drive Assy KYB 4452563 4688059 Travel Motor
Wuhan Xinlaifu Hydraulic Equipment Co., Ltd. is one of the leading manufacturers and suppliers of msf-340vp-eh6 msf-340vp-eh7 msf-340vp-eh1 final drive assy kyb 4452563 4688059 travel motor in China. With abundant experience, we warmly welcome you to buy high quality customized products at competitive price from our factory. Also, OEM&ODM service is available.
Specifications
| Parameter | MSF-340VP-EH6 | MSF-340VP-EH7 | MSF-340VP-EH1 |
|---|---|---|---|
| Series | MSF-340VP KYB Final Drive | MSF-340VP KYB Final Drive | MSF-340VP KYB Final Drive |
| Displacement | 340 cc/rev | 340 cc/rev | 340 cc/rev |
| Max Continuous Pressure | 340 bar (4930 psi) | 340 bar (4930 psi) | 340 bar (4930 psi) |
| Max Intermittent (Peak) Pressure | 360 bar (5220 psi) | 360 bar (5220 psi) | 360 bar (5220 psi) |
| Max Output Torque | 41500 N·m | 41500 N·m | 41500 N·m |
| Max Output Speed | 41 rpm | 41 rpm | 41 rpm |
| Min Speed | 0.5 rpm | 0.5 rpm | 0.5 rpm |
| Mounting Type | Integrated planetary reduction gearbox | Integrated planetary reduction gearbox | Integrated planetary reduction gearbox |
| Shaft Type | Splined output shaft | Splined output shaft | Splined output shaft |
| Typical Application | Komatsu PC1250LC-8 excavator | Large heavy-duty excavator | Heavy excavator, compatible OEM PN:4452563,4688059 |
Product Overview
KYB MSF-340VP Series Travel Motor – Two-Speed Final Drive Assembly for Heavy Excavators
When the travel motor on a 50–80 ton excavator fails, the machine stops moving. It cannot reposition on the job site, cannot climb the haul road, and cannot be loaded onto a transporter without heavy lifting equipment. For a mining or quarry operation, that is lost production every shift.
The KYB MSF-340VP is the flagship two-speed hydraulic travel motor and final drive assembly for heavy excavators in the 45–120 ton class, with primary applications in the 50–80 ton range. It is not a single component - it is a complete integrated assembly consisting of a swashplate axial piston motor, a three-stage planetary reduction gearbox, and a comprehensive suite of integrated control valves.
What makes the MSF-340VP different from a standard travel motor?
The MSF-340VP is engineered for mining and quarrying duty cycles - continuous operation under high load, frequent directional changes, and the shock loads of track impact on rocky ground. The motor unit uses a swashplate axial piston design with a two-speed shift function that operates under the same flow, allowing a wider range of speed control without changing pump output.
Which MSF-340VP variant do you need? That depends on your machine:
| Your Machine Brand | Compatible MSF-340VP Variant | OEM Reference Number |
|---|---|---|
| Hitachi ZX450 / ZX450-3 / ZX470 | MSF-340VP-EH6 | 4452563 |
| John Deere 670G / 870G / 670 / 870 P-Tier | MSF-340VP (standard) | 4688059 / PG202170 |
| Hitachi ZX650 / ZX670 / ZX850 / ZX870 | MSF-340VP-EH6 / EH7 | 4688059 / B0440-96070 |
| Komatsu PC850-8 / PC850 | MSF-340VP-EH6 | - |
| SANY SY485H / SY550H | MSF-340VP | A6VE107 |
| XCMG XE700 / XE900D | MSF-340VP | - |
| Sumitomo SH700 / Case CX700B / CX750D | MSF-340VP | KWA0018 / KWA0017 / KWA0019 |
Core Advantages
2.1 Complete Integrated Assembly – Motor, Gearbox, and Control Valves in One Unit
The MSF-340VP is not a motor that you assemble with separate components. It arrives as a factory-tested, pre-assembled final drive ready for installation.
What is included in the assembly:
| Component | Function |
|---|---|
| Swashplate axial piston motor | Converts hydraulic pressure into rotational torque |
| Three-stage planetary reducer | Reduces motor speed and multiplies torque to drive the track sprocket |
| Counterbalance valve | Prevents the motor from overrunning on downhill slopes; prevents cavitation |
| Two-speed mechanism | Shifts between high-torque and high-speed travel modes under load |
| Parking brake | Multiple-plate wet disk brake holds the machine on grades when parked |
| Cushion relief valve | Reduces shock at stop and prevents cavitation |
What this means for your repair: You receive one part number, one assembly, and one installation procedure. No sourcing separate components, no assembly alignment, no bench testing. The assembly is factory-calibrated and tested before shipment.
2.2 Two-Speed Travel – High Torque for Grading, High Speed for Hauling
The MSF-340VP's two-speed mechanism allows the operator to shift between two displacement settings under the same flow - without changing pump output or engine speed.
| Mode | Displacement | Output Speed | Best For |
|---|---|---|---|
| Low Speed / High Torque | 337.2 cc/r | Lower speed | Working on grades, rough terrain, heavy dozing |
| High Speed / Low Torque | 228.6 cc/r | Higher speed | Traveling on flat ground, repositioning, haul road |
Practical benefit: The operator can work in high-torque mode for digging and grading, then shift to high-speed mode for travel without stopping the machine. This reduces cycle times and improves operator productivity.
2.3 Built for Mining Duty – 22,000–25,000 N·m Output Torque
The MSF-340VP delivers 22,000–25,000 N·m of output torque at the sprocket through the three-stage planetary reducer. The maximum working pressure is 34.3–35 MPa (343–350 bar) .
How this torque is achieved:
Three-stage planetary gear set - delivers a large reduction ratio (approximately 1:55) and high output torque
Hardened alloy steel gears - withstand the shock loads of track impact on rock and hard ground
Floating oil seal - provides reliable dustproof and leakproof performance for long service life
Splined output connection - directly matched to the excavator drive sprocket for heavy torque transmission
2.4 OEM Cross-Reference – One Assembly, Multiple Part Numbers
The MSF-340VP is listed under multiple OEM part numbers across different excavator brands. This is not a different product - it is the same KYB assembly identified by different part numbers in each brand's parts system.
| OEM Part Number | Primary Machine Application |
|---|---|
| 4452563 | Hitachi ZX450 / ZX450-3 / ZX470 |
| 4688059 | John Deere 670G / 870G LC / Hitachi ZX450–ZX870 |
| B0440-96070 | Hitachi ZX450 / ZX470 / ZX650 / ZX670 / ZX850 / ZX870 |
| PG202170 | John Deere 670G / 870G LC |
| 9254461 / 9254462 / 4641493 | Hitachi ZX650LC-3 / ZX670 / ZX670LCH-3 |
| KWA0018 / KWA0017 / KWA0019 | Sumitomo SH700 / Case CX700B / CX750D |
What this means for you: When searching for a replacement, use the part number from your machine's parts manual. All the numbers above reference the same MSF-340VP assembly - the difference is the OEM documentation system, not the physical motor.
2.5 Comprehensive Machine Coverage – 45–120 Ton Excavator Class
The MSF-340VP is the standard travel motor for a wide range of heavy excavators. Confirmed compatible machine models include:
| Brand | Compatible Models |
|---|---|
| Hitachi | ZX450-3, ZX470-3/5G, ZX650-3, ZX670-3/5G, ZX850-3, ZX870-3/5G, ZX1000K-3, EX1200-6 |
| Komatsu | PC750, PC800, PC850-8, PC1250 |
| John Deere | 670G, 870G LC, 670 P-Tier, 870 P-Tier |
| SANY | SY485H, SY485H-Pro, SY550H |
| XCMG | XE700, XE900D |
| Sumitomo | SH700 |
| Case | CX700B, CX750D |
| Kobelco | SK850 |
Before ordering: Confirm your machine model and serial number, and cross-reference the OEM part number from your parts manual. The MSF-340VP is available in multiple variants (EH1, EH6, EH7, FH7, FL1, 110) that differ in mounting flange, port layout, and gear ratio. Using the wrong variant will result in installation delays.
Q1: What is the difference between MSF-340VP-EH1, EH6, and EH7?
These suffixes identify different OEM installation configurations - primarily mounting flange bolt pattern, hydraulic port layout, and gear ratio - matched to specific excavator brands.
| Variant | Primary Machine Application |
|---|---|
| MSF-340VP-EH6 | Hitachi ZX450/ZX470/ZX650/ZX670, Komatsu PC850 |
| MSF-340VP-EH7 | Hitachi ZX650/ZX670 higher-spec configurations |
| MSF-340VP-EH1 | Specific Hitachi/Komatsu OEM configuration |
They are not interchangeable unless the mounting flange and port layout match your machine's original interface. Confirm the suffix from your original motor's nameplate before ordering.
Q2: What are the key technical specifications?
| Parameter | Specification |
|---|---|
| Displacement | 340 mL/r (nominal) |
| Two-speed range | 228.6–337.2 cc/r |
| Maximum working pressure | 34.3–35 MPa (343–350 bar) |
| Output torque (complete assembly) | 22,000–25,000 N·m |
| Rotation speed range | 0–150 rpm |
| Gear ratio | Approximately 1:55 |
| Mounting flange | 30-hole standard design |
| Weight | Approximately 720 kg (complete assembly) |
Q3: What OEM part numbers cross-reference to the MSF-340VP?
| OEM Number | Primary Application |
|---|---|
| 4452563 | Hitachi ZX450 / ZX450-3 / ZX470 |
| 4688059 | John Deere 670G/870G / Hitachi ZX450–ZX870 |
| PG202170 | John Deere 670G / 870G LC |
| B0440-96070 | Hitachi ZX450 / ZX470 / ZX650 / ZX670 / ZX850 / ZX870 |
| 9254461 / 9254462 / 4641493 | Hitachi ZX650LC-3 / ZX670 / ZX670LCH-3 |
| KWA0018 / KWA0017 / KWA0019 | Sumitomo SH700 / Case CX700B / CX750D |
| A6VE107 | SANY SY485H / SY550H |
Use the part number from your machine's parts manual. All the numbers above reference the same MSF-340VP assembly.
Q4: Can I replace the MSF-340VP with a different travel motor model?
Not without significant system modification. The MSF-340VP is a matched assembly - the motor displacement, gear ratio, valve settings, and mounting interface are engineered as a system. Using a different travel motor model would require:
Modified mounting bracket or adapter plate
Re-calibrated hydraulic system pressure and flow settings
Potential modification to the track frame or sprocket interface
For a drop-in replacement that restores the machine to original performance, order the MSF-340VP with the correct variant suffix.
Q5: What maintenance does the MSF-340VP require?
Fluid cleanliness: Maintain hydraulic oil cleanliness to NAS 7 or better (approximately ISO 18/15).
Regular checks:
Monitor oil temperature - sustained operation above 80°C accelerates seal degradation
Check for pressure pulsation - may indicate internal leakage or valve malfunction
Inspect for external leaks at the port connections and sprocket hub seal
Maintenance intervals: Follow your machine manufacturer's schedule. Typical checks include:
Daily: Visual inspection for leaks and unusual noise
500 hours: Oil sample analysis for contamination and wear metals
2,000 hours: Full inspection of travel motor performance and brake function
Q6: What should I check before installing a replacement MSF-340VP?
Six items before installation:
Variant suffix - Confirm EH1, EH6, EH7, or other suffix matches your original motor
Mounting flange - 30-hole pattern; verify bolt circle diameter matches your track frame
Port layout - Confirm hydraulic A/B feed and drain port positions match your piping
Sprocket interface - Verify spline size and sprocket hub mounting dimensions
Brake release pressure - Standard brake relief pressure is 1.8 MPa; confirm your system provides this
Rotation direction - The MSF-340VP is bidirectional, but confirm the case drain orientation is correct for your installation
Q7: Do you provide test reports?
Yes. Each MSF-340VP assembly undergoes factory testing before shipment, including displacement verification, pressure/torque performance data, and brake function test. Test data and videos are available upon request.
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