10. Shuttle Valve - 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
Failure mode
No pump pressure developed in
one or more valve sections
Shuttle valve
Failure mode
Valve sections will not build
pressure (NOTE: Normally it will be
one section, but not all sections)
26 |
©
Danfoss | February 2017
Function: Directs the highest load pressure to either OC or CC pump control to satisfy the operating
valve section.
Cause
LS passages blocked or restricted
Serviceability: Not serviceable. Ensure entire system is clean.
LS circuit
PVP
PVB
PVB
LS
circuit
Description: Self cleaning internal shuttle system.
Location: PVB (valve section) module.
Function: Determines which valve section is developing highest load pressure.
Cause
Worn shuttle disc
Excessive air entrained in the hydraulic oil
Serviceability: Not serviceable. Ensure entire system is clean.
Corrective action
Disassemble valve. Inspect passages for blockage
Corrective action
Replace complete module (seat is pressed into module)
Ensure that the oil has enough dwell time in tank, has good anti-
foaming agent, and pump inlet vacuum is within specifications
11039167 | AX00000031en-US0301
10. Shuttle valve
P107 815E
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Table of Contents
Troubleshooting
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Do you have a question about the PVG 32 and is the answer not in the manual?
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