Open Center Plug - Danfoss PVG 32 Service Manual
Proportional valve group
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Also See for PVG 32:
- Technical information (76 pages) ,
- Service manual (15 pages) ,
- Application manual (13 pages)
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Service Manual
PVG 32 Proportional Valve Group
PVG 32 Component Troubleshooting
Open center plug
Failure mode
Valve operates at system relief
setting at all times
22 |
©
Danfoss | February 2017
Pressure gauge port
When valve is equipped with the PVPC option use a running tee to measure pressure. Torque tee to hose
adaptor torque specification.
PVPC with check valve
Description: Plug that is installed in the inlet cover for a system with a fixed displacement pump.
Location: In the PVP module (Inlet cover).
Function: Connection for the load sense signal to shift the unloading spool to build main system
pressure and provides a connection to the main system relief valve.
Cause
Open center plug is not seated properly
Pressure gauge port
P107 735E
Tee into pressure port
to measure pressure
P107 734E
Corrective action
Reinstall plug and torque to 4 Nm [35 lbf•in] using a 3 mm internal
hex wrench
11039167 | AX00000031en-US0301
PVPC with check valve
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Table of Contents
Troubleshooting
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Questions and answers
После нескольких поворотов катка гидравлика уходит в аварию при перезагрузке снова срабатывает несколько раз и останавливается в аварии.
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.
This answer is automatically generated