Closed Center Plug And Orifice - Danfoss PVG 32 Service Manual

Service Manual
PVG 32 Proportional Valve Group
PVG 32 Component Troubleshooting

Closed center plug and orifice

Failure mode
Valve operates at system relief
setting at all times
Can not adjust main relief above
pump pressure setting of 30 Bar
[450 psi] Delta for closed inlet
sections
© Danfoss | February 2017
Serviceability: Open center plug is serviceable.
1. Use a 6 mm internal hex to remove cavity plug from valve.
2. Use a 3 mm internal hex to remove open center plug.
3. Clean or replace open center plug.
4. Install open center plug.
5. Torque plug to 4 Nm [35 lbf•in].
6. Install new seal washer and install cavity plug. Torque to 35 Nm [130 lbf•in].
Open center plug
Plug
6 mm
35 Nm
[308 lbf•in]
Seal
washer
Open
center
plug
3 mm
4 Nm
[35 lbf•in]
Description: Plug that is installed in the inlet cover for a system with a variable displacement pump.
Location: In the PVP module (Inlet cover).
Function: Allow connection for the load sense signal to the pump and provide connection to the main
system relief valve.
Cause
Plug and orifice are not seated properly
Orifice is plugged
Serviceability: Closed center plug and orifice are serviceable.
1. Use a 6 mm internal hex to remove cavity plug from valve.
2. Use a 4 mm internal hex to remove closed center plug.
3. Use a 2.5 mm internal hex to remove orifice.
4. Clean or replace orifice. Install orifice. Torque to 4 Nm [35 lbf•in].
5. Install new seal and install closed center plug. Torque to 8 Nm [71 lbf•in].
6. Install new O-ring and install plug. Torque to 35 Nm [130 lbf•in].
P107 736E
Corrective action
Reinstall orifice and torque to 4 Nm [35 lbf•ft] using a 3 mm
internal hex wrench.
Reinstall plug and torque to 8 Nm [71 lbf•in] using a 8 mm internal
hex wrench
Remove and clean orifice. Reinstall
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