708-1H-00231 Hydraulic Pump For Komatsu D85PX bulldozer

708-1H-00231 Hydraulic Pump For Komatsu D85PX bulldozer Featured Image
  • 708-1H-00231 Hydraulic Pump For Komatsu D85PX bulldozer

Short Description:

708-7S-00352,708-7S-00350,708-7S-00351 are interchangeable hydraulic fan motor assemblies for Komatsu D61EX bulldozer.

Product Detail

Product Tags

description

This variable piston pump adopts advanced load-sensing control mechanism. The internal cylinder block, piston and shoe assembly are made of high-strength wear-resistant alloy, processed by precision grinding to ensure low friction and long service life under continuous heavy load. The pump housing is cast from high-strength alloy, which can withstand high working pressure and resist impact vibration in harsh construction sites.
Multiple groups of composite sealing components are equipped inside the pump to effectively prevent oil leakage under pressure fluctuation. Every finished pump will pass strict bench tests including pressure endurance, flow detection and sealing inspection before delivery. The mounting structure fully matches the original installation interface, supporting direct replacement without modification.

product parameters

Part No：708-1H-00231
Product Type：Variable Displacement Main Piston Pump
Applicable Equipment：Komatsu D85PX Bulldozer
Core Technology：CLSS Closed-Center Load Sensing Control
Rated Working Pressure：22.5 MPa
Max Instantaneous Peak Pressure：26 MPa
Max Output Flow：195 L/min
Rated Speed：1850 rpm
Max Allowable Speed：2200 rpm
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-25℃ ~ +110℃
Sealing Type：Multi-composite high pressure seal
Main Material：Alloy cast housing, hardened cylinder block, wear-resistant piston & shoe
Installation Method：Flange mounting
Application：Main hydraulic power supply for bulldozer blade, steering and auxiliary hydraulic system

Applicable Models

This hydraulic main pump is aftermarket replacement spare part:
• Komatsu D85PX-15, D85PX-15EO bulldozer
• Komatsu D85EX-15, D85EX-15EO bulldozer
• Komatsu D85MS-15 bulldozer

Application Scenarios

This hydraulic main pump is designed for heavy-duty bulldozer working conditions:
• Large earthmoving projects: Mass soil pushing, land leveling and site shaping.
• Mining sites: Overburden stripping, stockpile arrangement and road maintenance inside mines.
• Quarry projects: Material handling and foundation preparation under dusty environment.
• Infrastructure construction: Dam, road and airport foundation earthwork.
• Land reclamation: Long-hour continuous heavy load operation.

advantage

• CLSS load sensing control system can dynamically adjust pump output flow according to load demand, reduce power waste and achieve obvious fuel saving effect during intermittent operation.
• Hardened cylinder block and high-precision piston shoe assembly feature excellent wear resistance, maintain stable hydraulic output under long-time heavy load and effectively extend service cycle.
• Robust alloy pump housing with high pressure resistance and shock resistance, can adapt to severe vibration and dusty working environment of mining and earthmoving sites.
• Multi-layer composite sealing structure offers stable sealing performance under frequent pressure fluctuation, greatly lower the probability of internal leakage and external oil seepage.
• Good interchangeability with the original alternative part number, convenient spare parts procurement and inventory management for distributors and maintenance service providers.
• Standard flange mounting interface matches original equipment perfectly, direct field replacement without machining modification, shorten machine downtime and improve construction progress.

FAQ 

Q1: Which bulldozer does 708-1H-00231 hydraulic pump fit?
A1: It mainly fits Komatsu D85PX-15 / D85PX-15EO bulldozer, also compatible with D85EX-15, D85EX-15EO and D85MS-15. Confirm machine serial number before purchase.

Q2: What are the typical failure signs of this hydraulic main pump?
A2: Insufficient pushing force, slow movement of the blade, abnormal noise from pump housing, obvious oil leakage, unstable hydraulic pressure and overheating of hydraulic oil.

Q3: What is the interchangeable part number for this pump?
A3: 708-1H-00231 can be replaced by 708-1H-01233 for the same series D85 bulldozers.

Q4: What preparations need to be done before installing the hydraulic pump?
A4: Release residual hydraulic pressure, drain old hydraulic oil, clean hydraulic tank and pipeline thoroughly, replace hydraulic filter. After assembly, bleed air from the hydraulic circuit and test the whole machine function.

Q5: The bulldozer still lacks power after replacing the main pump, what should we check?
A5: Check the relief valve setting, hydraulic oil quality and viscosity, piston shoe wear of old pump, clogged filter, and possible failure of control valve. Insufficient power is not always caused by the main pump.

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