708-1L-00012 Hydraulic Main Pump For Komatsu D65 bulldozer

708-1L-00012 Hydraulic Main Pump For Komatsu D65 bulldozer Featured Image
  • 708-1L-00012 Hydraulic Main Pump For Komatsu D65 bulldozer

Short Description:

708-1L-00012 is a variable piston hydraulic main pump for Komatsu D65 series bulldozers.

Product Detail

Product Tags

description

This variable piston main pump is built with load-sensing control system to match hydraulic output with actual working demand in real time. Internal pistons, slippers, valve plate and cylinder block are processed with ultra-precision grinding, lowering internal friction and maintaining stable volumetric efficiency under repeated heavy-duty pushing and ripping cycles. The heavy-duty cast iron pump housing delivers high structural rigidity to withstand vibration, impact, dust and mud contamination on rough construction ground. It adopts multi-group high-pressure composite sealing assembly to resist continuous hydraulic pressure fluctuation and wide ambient temperature variation, effectively minimizing internal leakage and external oil seepage. Every finished hydraulic pump undergoes strict bench tests including pressure test, flow detection, volumetric efficiency and tightness inspection before delivery. Standard flange and spline shaft installation dimensions fully match original assembly for direct replacement without cutting, drilling or mechanical modification.

product parameters

Part No：708-1L-00012
Interchangeable Part No：708-1L-00011
Product Type：Variable Piston Hydraulic Main Pump
Applicable Equipment：Komatsu D65EX-12 / D65PX-12 / D85EX-12 Bulldozer
Core Technology：Load sensing variable control
Pump Displacement：110 cc/rev
Rated Working Pressure：28 MPa
Rated Speed：1600 rpm
Min Idle Speed：600 rpm
Volumetric Efficiency：≥94%
Working Temperature Range：-25℃ ~ +110℃
Applicable Altitude：≤3000m
Sealing Type：High pressure composite wear-resistant seal
Internal Leakage Standard：≤1.8 L/min (rated pressure)
Main Material：Cast iron pump housing, hardened piston & slipper, wear-resistant valve plate, alloy cylinder block
Application：Main hydraulic power supply for bulldozer blade, steering and ripper system

Applicable Models

This hydraulic main pump is aftermarket replacement spare part:
・Komatsu D65EX-12 Bulldozer
・Komatsu D65PX-12 Bulldozer
・Komatsu D85EX-12 Bulldozer

Application Scenarios

This hydraulic main pump is designed for bulldozer heavy-duty earthmoving scenarios:
・Open-pit mine: Continuous rock pushing, site leveling, stockpile shaping and ripping work under high temperature and dusty mine environment.
・Land reclamation project: Large-area ground leveling, bulk soil stripping and backfill operation.
・Road construction: Roadbed excavation, slope trimming and foundation compaction preparation.
・Quarry site: Waste rock pushing, yard tidying and material stacking work.
・Dam & water conservancy project: Heavy-duty earth moving under muddy and wet field conditions.

advantage

・Built-in load sensing control automatically adjusts pump displacement according to load demand, reduces unnecessary power consumption and lowers fuel consumption during light-load grading work.
・Precision hardened piston, slipper and valve plate assembly maintain stable volumetric efficiency, resist abrasive wear from rock dust and soil particles, extending service life under long-time continuous bulldozing cycles.
・Heavy-duty cast iron pump housing features outstanding shock and vibration resistance, protecting internal core components from impact damage on rough construction ground.
・Multi-layer composite sealing structure maintains stable sealing performance under fluctuating pressure and temperature, effectively lowering the probability of internal leakage and external hydraulic oil seepage.
・Good interchangeability with alternative part number 708-1L-00011, helping distributors and field maintenance teams simplify spare parts inventory management.
・Standard flange and spline shaft mounting dimensions fully match original installation position, supporting direct on-site replacement without machining modification, reducing machine downtime and accelerating earthmoving project progress.

FAQ 

Q1: Which bulldozer does 708-1L-00012 hydraulic main pump fit?
A1: It mainly fits Komatsu D65EX-12, D65PX-12 bulldozer, also compatible with D85EX-12 bulldozer, interchangeable with 708-1L-00011. Confirm machine serial number before purchase to avoid wrong part selection for different serial ranges.

Q2: What abnormal signs indicate the hydraulic main pump needs replacement?
A2: Slow blade lifting/tilting, weak pushing force, pump body oil leakage, abnormal noise under heavy load, unstable pressure and jerky movement of ripper. If these symptoms gradually worsen during field operation, internal wearing of the hydraulic pump is highly possible.

Q3: What preparations should be completed before installing the hydraulic main pump?
A3: Release residual hydraulic pressure, clean hydraulic pipelines and hydraulic tank, inspect hydraulic oil quality and filter condition. After assembly, bleed air from hydraulic circuit and test blade, steering and ripper function step by step under no-load condition.

Q4: The bulldozer still lacks pushing power after replacing the hydraulic main pump, what should we check?
A4: Inspect pressure control valve, hydraulic oil contamination, pipeline air intake, steering cylinder and blade cylinder status. Weak pushing performance may not only be caused by pump damage, full hydraulic system inspection is required.

our warehouse

our warehouse

Pack and ship

Pack and ship


  • Previous:
  • Next:
    • Write your message here and send it to us

    Products categories