No Cylinder/Motor Response In Either Direction When Remote Controller Is Actuated - Danfoss PVG 32 Service Manual

Proportional valve group

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Technical information (76 pages)

Service manual (15 pages)

Application manual (13 pages)

Table Of Contents

Table of Contents

Service Manual

PVG 32 Proportional Valve Group

System Troubleshooting

Troubleshooting flow chart

Problem?

Mechanical

No cylinder/motor response in either direction when remote controller is actuated

Cause

Verify if fault is mechanical, electrical

or hydraulic

Sticking main spool

Internal filters blocked

Danfoss | February 2017

Hydraulic

Electrical

Check

Operate manual lever to confirm mechanical or

electrical or hydraulic

Remove manual, electrical, and hydraulic actuators

from the valve section. Remove main spool from valve

section and inspected for damage. If no damage

reinstall the main valve spool and it should move

freely in the valve section bore.

Check movement of manual lever when electrical

controller is operated

Check movement of manual lever when hydraulic

controller is operated

If none of the above check pump per manufacturers

recommended procedure

Check for blockage in internal filters

Electronic

Software

Corrective action

If moving the manual lever operates the cylinder/motor

check electrical or hydraulic

Replace the valve module and main spool. If any damage

is found on the main spool

If manual lever does not move check electrical voltage

signal from controller, wiring at the PVE module

If manual lever does not move check hydraulic controller

pressure at the PVG valve module - 25 Bar [360 PSI]

Repair or replace pump per manufacturers

recommended procedure

Remove blockage

11039167 | AX00000031en-US0301 | 15

P107 823

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Troubleshooting

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Questions and answers

Александр

March 5, 2025

После нескольких поворотов катка гидравлика уходит в аварию при перезагрузке снова срабатывает несколько раз и останавливается в аварии.

1 comments:

Mr. Anderson

March 5, 2025

The Danfoss PVG 32 hydraulic system could go into fault mode after several turns of the roller due to the following possible causes:

1. Contamination in Hydraulic Oil – Dirt or debris in the oil can affect valve operation.
*Check*: Take an oil sample.
*Corrective Action*: Flush the system and refill with clean, filtered fluid per OEM specifications.

2. Air in Hydraulic Pilot Lines – Air trapped in the signal lines can cause unstable operation.
*Check*: Inspect for air in the signal lines.
*Corrective Action*: Bleed air from the hose connection at the valve section.

3. Low Hydraulic Oil Supply – Insufficient oil can cause pressure drops and improper function.
*Check*: Verify fluid level in the reservoir.
*Corrective Action*: Refill with clean, filtered fluid per OEM specifications.

4. Faulty Hydraulic Remote Actuator – A malfunctioning actuator can lead to inconsistent valve response.
*Check*: Measure signal pressure from the remote hydraulic controller.
*Corrective Action*: Repair or replace the actuator.

5. External Hydraulic Pilot Pressure Too Low – If pressure is too low, the main spool may not function properly.
*Check*: Measure external pilot pressure from the pilot pump and check for restrictions.
*Corrective Action*: Ensure the pilot pressure meets the required specifications.

6. Leaking or Burst Supply Hose – A damaged hose can lead to pressure loss and system faults.
*Check*: Inspect supply lines to the valve stack.
*Corrective Action*: Repair or replace damaged hoses.

These potential causes should be systematically checked and corrected to restore proper system operation.