A10VSO28DR1/31R-PKC62K03 A10VSO28DR1/31R-PKC62N00 A10VSO28DRG/31L-PKC62K03
A10VSO28DRG/31L-PKC62N00 A10VSO28DRG/31L-VSC62N00 Rexroth Germany spot axial piston pump excavator hydraulic pump

Rexroth A10VSO hydraulic pump

1. What are the possible causes and solutions for insufficient or no oil output from the hydraulic pump?

• Reason:

Excessive resistance in the oil suction pipeline (such as clogged oil filter, low oil tank level, or air leakage in the inlet pipe).

Internal leakage of the pump (scratches on the oil distribution plate, poor sealing, sand holes, etc.).

The inclination angle of the inclined plate is too small and the displacement is insufficient.

Motor reversal (requires adjustment of phase sequence).

• Solution:

Clean the oil filter, add oil to the normal liquid level, and check the sealing of the pipeline.

Replace worn parts (such as plungers, oil distribution plates) or grind mating surfaces.

Adjust the variable piston to increase the inclination angle of the inclined plate.

2. How to adjust if there is still traffic output at the median level?

Reason: Deviation, looseness, or wear of the control mechanism (such as wear of the inclined plate ear shaft).

Solution: Reset the controller, tighten or replace damaged parts, and check the angle holding force.

How to troubleshoot the high vibration and noise during pump operation?

• Mechanical reasons:

The pump and motor shaft are not concentric, the coupling is damaged, or the bolts are loose.

Wear of bearings or variable head bearings (dry friction or impurities in the oil during start-up).

• Hydraulic reasons:

The oil inlet pipe is too thin, the oil filter is clogged, or the oil viscosity is too high.

• Solution:

Reinstall and replace worn parts.

Select appropriate oil to ensure smooth fuel tank design and piping.

What are the causes and solutions for overheating of the pump body?

• Reason:

Mechanical friction (such as improper clearance between moving parts) or liquid friction (high-pressure oil leakage converted into thermal energy).

Filter blockage leads to excessive back pressure in the return oil.

• Solution:

Adjust the gap and increase the capacity of the cooler or fuel tank.

Clean or replace the filter.

How to solve the problem of oil leakage?

• Common oil leakage points:

Damaged spindle oil seal, internal leakage (high oil seal pressure), loose external pipeline or aging sealing gasket.

• Solution:

Replace the oil seal or defective shaft, check the size of the oil drain pipe, and tighten the joint.

What are the key points of daily maintenance?

• Oil management:

Maintain oil temperature at 25-60 ℃, cleanliness level ≥ 8, and regularly test oil quality.

• Regular inspection:

Conduct a comprehensive inspection of seals, filters, and mechanical components every 6 months.

After running for 3000 hours, it is necessary to check the status of the oil replenishment pump daily.

Before starting: Ensure that the pump is filled with oil to avoid dry friction.

How to adjust abnormal pressure (too high/too low)?

• Low pressure: Check for pipeline leaks, overflow valve faults, or cylinder block distribution plate leaks.

Excessive pressure: Adjust the overflow valve, check the directional valve or return oil pipeline.

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precautions

Installation requirements: The concentricity between the pump shaft and the motor shaft should be less than 0.05mm, and the suction height should not exceed 500mm.

• Spare parts replacement: It is recommended to use original seals and wear-resistant components to ensure compatibility.

A10VSO 18 series:

A10VSO18DR/31R-PPA12N00,

A10VSO18DR/31R-PPA12K01,

A10VSO18DFR1/31R-PPA12N00,,

A10VSO18DFR1/31R-PPA12N00,

A10VSO18DFR1/31R-PPA12K01,

A10VSO18DFR/31R-PPA12N00,

A10VSO18DFLR/31R-PPA12N00,

A10VSO18DG/31R-PPA12N00,

A10VSO18DRG/31R-PPA12N00,

A10VSO18DFE1/31R-PPA12N00,

A10VSO18FHD/31R-PPA12N00,

A10VSO18ED/31R-PPA12N00,

A10VSO 28 series:

A10VSO28DR/31R-PPA12N00,

A10VSO28DR/31R-PPA12K01,

A10VSO28DFR1/31R-PPA12N00,

A10VSO28DFR1/31R-PPA12K01,

A10VSO28DFR/31R-PPA12N00,

A10VSO28DFLR/31R-PPA12N00,

A10VSO28DG/31R-PPA12N00,

A10VSO28DRG/31R-PPA12N00

A10VSO28DFE1/31R-PPA12N00,

A10VSO28FHD/31R-PPA12N00,

A10VSO28ED/31R-PPA12N00,

A10VSO 45 series:

A10VSO45DR/31R-PPA12N00

A10VSO45DR/31R-PPA12K01,

A10VSO45DFR1/31R-PPA12N00

A10VSO45DFR1/31R-PPA12N00,

A10VSO45DFR1/31R-PPA12K02

A10VSO45DFR/31R-PPA12N00,

A10VSO45DFR/31R-PPA12K01,

A10VSO45DFR/31R-PPA12K26

A10VSO45DFLR/31R-PPA12N00,

A10VSO45DG/31R-PPA12N00

A10VSO45DRG/31R-PPA12N00,

A10VSO45DFE1/31R-PPA12N00,

A10VSO45FHD/31R-PPA12N00,

A10VSO45ED/31R-PPA12N00,

A10VSO 71 series:

A10VSO71DR/31R-PPA12N00

A10VSO71DR/31R-PPA12K01,

A10VSO71DFR1/31R-PPA12N00,

A10VSO71DFR1/31R-PPA12K02,

A10VSO71DFR/31R-PPA12N00,

A10VSO71DFR/31R-PPA12K27

A10VSO71DFLR/31R-PPA12N00,

A10VSO71DG/31R-PPA12N00,

A10VSO71DRG/31R-PPA12N00,

A10VSO71DFE1/31R-PPA12N00,

A10VSO71FHD/31R-PPA12N00,

A10VSO71ED/31R-PPA12N00,

A10VSO 100 series:,

A10VSO100DR/31R-PPA12N00,

A10VSO100DR/31R-PPA12K01,

A10VSO100DFR1/31R-PPA12N00,

A10VSO100DFR1/31R-PPA12N00,,

A10VSO100DFR1/31R-PPA12K01

A10VSO100DFR/31R-PPA12N00,,

A10VSO100DFLR/31R-PPA12N00,

A10VSO100DG/31R-PPA12N00,,

A10VSO100DRG/31R-PPA12N00,

A10VSO100DFE1/31R-PPA12N00,,

A10VSO100DFE1/31R-PPA12K02,

A10VSO100FHD/31R-PPA12N00

FAQ:

What is the maximum pressure rating?

• Continuous pressure: Up to 280 bar (4060 psi)

• Peak pressure: 350 bar (5075 psi)

4. What is the displacement volume?

The nominal displacement is 28 cm³/rev (1.71 in³/rev).

5. What type of hydraulic oil should be used?

Recommended fluids:

• Mineral-based hydraulic oils (ISO VG 15–68)

• Synthetic or biodegradable fluids (check compatibility)

• Maintain cleanliness (ISO 4406 18/16/13 or better)

6. What are common applications for the A10VSO28?

• Construction machinery (excavators, loaders)

• Industrial presses & injection molding

• Material handling equipment

• Agricultural machinery

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