Bulldozer Komatsu D37EX-23 D37PX-23 D37EX-24 D37PX-24 D39EX-23 Hydraulic Main Pump Piston Pump 708-2M-00131 708-2M-01130

High-performance hydraulic main pump designed specifically for Komatsu D39EX-22, D39PX-22, D37EX-23, D37PX-23, D37EX-24, D37PX-24, D39EX-23, D39PX-23, D39EX-24, and D39PX-24 bulldozer models. This piston pump ensures reliable operation and optimal hydraulic system performance.

• Abnormal pump noise: Worn pistons & slippers, scratched valve plate; air ingress in suction line, contaminated hydraulic oil
• Insufficient output pressure: Internal leakage caused by worn piston assembly and aged seals; faulty pressure regulator
• Slow movement: Reduced volumetric efficiency and insufficient flow; clogged filter element, excessive suction resistance
• Abnormally high oil temperature: Heavy internal leakage and increased friction; wrong hydraulic oil grade or deteriorated oil
• Pump housing leakage: Aged or damaged end cover seals & O-rings; uneven bolt torque, cracked pump housing

• Verify stamped part number on old pump and bulldozer model before ordering
• New or remanufactured assemblies available - confirm test report and warranty for reman units
• Inspect hydraulic oil and suction filter simultaneously during replacement
• Replace full seal kit during installation to prevent premature failure
• Pre-commissioning inspection: Check housing for damage, verify port threads and nameplate
• Perform no-load test for pressure and noise after delivery
• Storage: Keep in dry, dark environment; seal oil ports against dust and moisture