720-2M-00081 hydraulic pump for Komatsu D31EX-22 E31PX-22 D37EX-22 D37PX-22 bulldozer
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OEM Part Nos: 720-2M-00081, 720-2M-01081Fits: D31EX-22, D31PX-22, D37EX-22, D37PX-22 (HST bulldozer)
1. Pump Type & Specifications
Type: HST Hydrostatic Main Pump (HPV63+63 tandem)
Displacement: 63 cm³/rev × 2 (tandem)
Rated Pressure: 32 MPa (320 bar)
Drive: Engine-driven, closed-loop HST system
Weight: ~160 kg
System: CLSS (Closed-center Load Sensing System)
2. Compatible Models
D31EX-22 (SN: 10001–UP)
D31PX-22 (SN: 10001–UP)
D37EX-22 (SN: 10001–UP)
D37PX-22 (SN: 10001–UP)
3. Part Number Reference
720-2M-00081: Standard main pump assembly (current OEM PN)
720-2M-01081: Updated revision (supersedes older 00081; functionally identical)
4. Key Features
Genuine Komatsu fit, direct bolt-on replacement
Tandem HPV63 design for high torque & precise HST control
Reinforced housing & heavy-duty bearings for mining/construction sites
Floating seals for leak prevention and extended service life
Electronic control compatible with -22 series HST management
5. Supply & Warranty
Condition: New genuine / high-quality aftermarket / remanufactured
Warranty: 12 months (unlimited hours)
Stock: Guangzhou warehouse in stock, ships in 1–3 days
Packaging: Export wooden crate, anti-rust treatment
6. FAQ
Q: What’s the difference between 720-2M-00081 and 720-2M-01081?
A: 01081 is the latest updated part number, superseding 00081; no functional difference.
Q: Can this pump replace the -21 series (720-2M-00050)?
A: No, -22 series has updated HST control; not interchangeable with -21.
Q: Do you offer repair kits for these pumps?
A: Yes, seal kits, bearing sets, piston groups, and valve plates available.