708-1L-00740 Hydraulic Pump For Komatsu D65EX bulldozer

Short Description:

708-1S-00460 is OEM-grade variable piston fan pump for Komatsu D65EX-16, D65PX-16, D65EX-18 medium bulldozer.

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Product Detail

Product Tags

description

product parameters

Part No：708-1L-00740
Product Type：Load Sensing Variable Piston Main Hydraulic Pump
Applicable Equipment：Komatsu D65EX-16, D65PX-16, D65EX-18 Medium Bulldozer
Core Technology：Load sensing + torque limiting dual power control, power distribution for compound action
Theoretical Displacement：54 cc/rev (calibrated for D65 working hydraulic system)
Rated Working Pressure：24 MPa (240 bar) (continuous working pressure for blade & ripper circuit)
Max Instantaneous Peak Pressure：28.5 MPa (285 bar) (max short-duration impact pressure)
Rated Working Speed：1950 rpm (rated engine driven speed)
Max Allowable Speed：2400 rpm (max safe no-load rotating speed)
Max Output Flow：118 L/min (maximum flow for combined operation)
Minimum Holding Displacement：12 cc/rev (low displacement standby mode)
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-20℃ ~ +108℃
Sealing Grade：High pressure dynamic sealing, low volumetric leakage
Main Material：Ductile iron housing, vacuum quenched alloy cylinder & piston assembly, HNBR+FKM combined seal
Net Weight：Approx 21KG
Application：Power supply for bulldozer blade, tilt, ripper and steering hydraulic circuit

advantage

• 54cc variable piston pump with load sensing and torque limiting dual control, rationally allocate power for blade lifting, tilting and ripper operation, prevent engine stall under heavy cutting load.
• Ductile iron pump housing delivers outstanding shock resistance, effectively absorb cyclic impact load during ripping and hard soil pushing, avoid pump shell cracking.
• Vacuum quenched alloy cylinder and piston assembly maintains low friction, high volumetric efficiency for long time, stable pushing force without obvious attenuation.
• HNBR+FKM composite sealing combination adapts to frequent pressure fluctuation, reduces internal leakage and external oil seepage under cyclic impact load.
• Rapid load response ensures smooth compound movements of bulldozer, improves efficiency for land leveling and rock loosening work.
• OEM flange and port layout for direct bolt-on replacement, saves disassembly time during field overhaul.
• Complete hydraulic bench test including torque and volumetric efficiency test, stable performance under cyclic heavy load earthwork projects.

FAQ

Q1: Which equipment does 708-1L-00740 hydraulic pump fit?
A1: This main hydraulic pump is specially applicable to Komatsu D65EX-16, D65PX-16 and D65EX-18 medium bulldozers. Please verify the machine serial number before purchase to get correct matching.

Q2: What is the core function of this hydraulic pump?
A2: It is the main hydraulic power source for D65 bulldozer working circuit. It converts engine mechanical power into hydraulic power to supply pressure oil for blade, tilt, ripper and steering systems. Dual power control adjusts pressure and flow automatically according to load, ensuring strong pushing force and stable compound movement in heavy earthwork.

Q3: What are the typical failure symptoms of aging or worn hydraulic pump?
A3: Common faults include insufficient pushing & ripping force; power drop during compound actions; pump internal abnormal knocking noise; volumetric efficiency decline leading to slow blade movement; internal leakage; shaft seal oil seepage; pump cannot build enough pressure under heavy load.

Q4: Bulldozer still has weak pushing force after replacing main pump, what are the possible reasons?
A4: Weak pushing force may not be caused by main pump failure. Check relief valve pressure setting, wear of control valve spool, cylinder seal damage, clogged filters and air trapped in hydraulic circuit. Inspect torque limiter and load sensing valve for stuck condition.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.