705-52-32001 Hydraulic Gear Pump for Komatsu HD465 HD605 Dump Truck

705-52-32001 Hydraulic Gear Pump for Komatsu HD465 HD605 Dump Truck

The 705-52-32001 / 7055232001 hydraulic gear pump is used for Komatsu rigid dump truck hydraulic system applications. Public supplier references commonly list this pump for HD465 and HD605 series dump trucks, including HD465-2, HD465-3, HD465-5 and HD605-5 model references.

This pump should be selected by the original pump number and physical configuration, not by model name alone. Komatsu dump trucks may vary by production version, serial number, hydraulic circuit layout and previous repair history. Final fitment should be verified before ordering.

Cross Reference Numbers

Common reference numbers may include 705-52-32001, 7055232001, 705-52-32000 and 7055232000.

These numbers should be treated as reference information only. Hydraulic gear pumps with similar numbers may still differ in shaft type, mounting face, hydraulic port direction, pump body layout or rotation direction. Please compare the old pump before purchase.

Important Note About 705-52-20290

The number 705-52-20290 / 7055220290 appears in some public references for Komatsu wheel loader applications such as WA450-1 and WA470-1. It should not be treated as a confirmed cross reference for this HD465 / HD605 dump truck pump unless the old pump label or parts reference confirms it.

Application and Fitment Reference

This product page should focus on Komatsu dump truck applications such as HD465-2, HD465-3, HD465-5 and HD605-5. Some marketplace listings may also mention HD605-3, but final fitment should be checked by the original pump number and machine serial number.

Before purchase, compare the old pump label, part number, shaft type, mounting hole pattern, hydraulic port layout, inlet and outlet direction, pump body shape and rotation direction. Clear photos of the old pump are recommended when the nameplate is missing or damaged.

Common Failure Symptoms

• Slow dump body lifting: the hoist system responds slowly or cannot lift normally under load.

• Heavy or unstable steering: steering response becomes slow, heavy or inconsistent.

• Brake-related hydraulic pressure issue: low pressure, warning symptoms or unstable operation may require hydraulic system inspection.

• Abnormal pump noise: whining, vibration or cavitation-like sound may indicate air entry, suction restriction, oil contamination or internal wear.

• Oil leakage: leakage may appear around the pump body, shaft seal, port fittings or mounting area.

• Hydraulic oil overheating: worn pump internals, blocked filters, restricted oil flow or relief valve issues may raise oil temperature.

• Metal particles in oil or filters: internal wear or system contamination should be checked before installing a replacement pump.

Troubleshooting Before Replacement

• Check hydraulic oil level, oil condition and contamination.

• Inspect suction lines, return lines, fittings and hydraulic filters.

• Check for air entry, loose connections or collapsed hoses.

• Measure hydraulic pressure and flow according to the machine service procedure.

• Inspect hoist, steering and brake hydraulic circuits before confirming pump failure.

• Check relief valves, control valves, cylinders and related hydraulic components.

• Confirm whether the fault is caused by the pump itself or by blocked filters, hose restriction, valve faults, cylinder leakage or contaminated oil.

Installation and Maintenance Notes

• Clean the pump mounting area and hydraulic line connections before removal.

• Cap all open hydraulic ports to prevent dust, water and metal particles from entering the hydraulic system.

• Inspect or replace hydraulic filters before installing the replacement pump.

• Flush the hydraulic system if metal particles, burnt oil or severe contamination are found.

• Lubricate or pre-fill the pump according to the service procedure before first startup.

• Check shaft alignment, mounting face, port direction and hose routing before tightening hydraulic lines.

• Start the machine at low speed first and check for leakage, abnormal noise and unstable pressure.

• Do not operate under heavy load until oil flow, pressure, temperature and system response are confirmed normal.

Fitment Check Before Ordering

To reduce wrong orders, please send the machine model, machine serial number, old pump part number, pump nameplate photo, shaft photo, mounting face photo and hydraulic port layout photo before quotation.

FAQ

Is 705-52-32001 used for Komatsu HD465 and HD605 dump trucks?

Public supplier references commonly list 705-52-32001 / 7055232001 for Komatsu HD465 and HD605 dump truck hydraulic system applications. Final fitment should be verified by the old pump number and machine serial number.

What is the relationship between 705-52-32001 and 7055232001?

7055232001 is the non-hyphen writing format of 705-52-32001. Both formats may appear in parts searches, supplier listings and maintenance records.

Is 705-52-20290 a cross reference for 705-52-32001?

Not confirmed. Public references often associate 705-52-20290 / 7055220290 with Komatsu WA450-1 and WA470-1 wheel loader applications. It should not be used as a confirmed HD465 / HD605 dump truck cross reference unless the old pump label or parts reference confirms it.

Which models are commonly listed for this pump?

Common model references include Komatsu HD465-2, HD465-3, HD465-5 and HD605-5. Some marketplace references may mention HD605-3, but final fitment should be checked before ordering.

What should I check before ordering?

Please check the old pump number, shaft type, mounting hole pattern, hydraulic port direction, pump body shape, rotation direction and machine serial number. Clear photos of the old pump are recommended.