HSS Pump 708-1H-00231 hydraulic pump for Komatsu D85EX-15 D85PX-15 D85EX-15EO D85PX-15EO bulldozer construction equipment



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OEM Part Numbers: 708-1H-00231, 708-1H-01233
Fits: D85EX-15, D85PX-15, D85EX-15EO, D85PX-15EO, D85MS-15 (SN 10001–UP)
1. Pump Type & Specifications
Type: Main Variable Piston Pump (HSS Series, Hydro-Static Steering)
Displacement: ~110 cm³/rev
Rated Pressure: 31.4 MPa (314 bar)
Max Flow: 260 L/min @ 2,100 RPM
Control: Hydraulic pressure sensing (HSS) with load feedback
Weight: ~110 kg (243 lbs)
Application: Main hydraulic pump for blade, ripper, steering & auxiliary systems
2. Part Number Interchange
708-1H-00231: Original main pump assembly (base OEM)
708-1H-01233: Updated version (supersedes 00231; interchangeable)
708-1H-01234: Alternative OEM revision (same fit/function)
708-1H-04412: Latest production replacement
3. Compatible Models
Komatsu D85EX-15 (SN 10001–UP)
Komatsu D85PX-15 (SN 10001–UP)
Komatsu D85EX-15EO (SN 10001–UP)
Komatsu D85PX-15EO (SN 10001–UP)
Komatsu D85MS-15 (SN 10001–UP)
4. Key Features
Genuine Komatsu OEM fit, direct bolt-on replacement
Heavy-duty HSS piston design for D85 heavy-duty dozer applications
Reinforced cast iron housing & FKM double-lip seals for high pressure & leak resistance
Precision HSS control for smooth, simultaneous implement & steering operation
Interchangeable with original; no modifications required
5. Supply & Warranty
Condition: New genuine / high-quality aftermarket / remanufactured
Warranty: 12 months (unlimited hours)
Stock: Guangzhou warehouse in stock, ships in 3–7 days
Packaging: Export wooden crate with anti-rust treatment
6. FAQ
Q: What’s the difference between 708-1H-00231 and 708-1H-01233?
A: 01233 is an updated revision of 00231; functionally identical with upgraded internal components for longer service life.
Q: Does this pump fit D85EX-18 or D85PX-18?
A: No, -15 series HSS pumps are not interchangeable with -18 series (different mounting flange & control valve).
Q: Are repair kits available for these pumps?
A: Yes, seal kits, bearing sets, piston groups, and valve plates in stock.