Pressure Matching Spool; Ls Connection - Danfoss PVG 100 Service Manual

Service Manual
PVG 100 Component Troubleshooting

Pressure Matching Spool

Failure mode
In open center systems the valve sections are
unstable
The adjusted pressure will not remain static in a
closed center system

LS Connection

24
PVG 100 Proportional Valves
PVPC with check valve
Description: Main pump flow unloading spool.
Location: PVP (inlet) module.
Function: Unloading spool.Serviceability: All internal components can be removed from the cavity,
cleaned, inspected and reassembled back into the valve Pressure adjustment spool
Cause
High wear allows leakage to tank
Low viscosity oil allowing high leakage around
spool to tank.
High wear
Serviceability: All internal components can be removed from the cavity, cleaned, inspected and
reassembled back into the valve
Pressure adjustment spool
O-ring
2.5 mm
3 Nm
[25 lbf•in]
Description: Port for LS signal for LS (static) option only controller for variable flow pump.
11048807 • Rev BA • October 2014
Check valve
P107 958E
Spool
Washer
Spring
Spring
O-ring
41 mm
85 Nm
[750 lbf•in]
Corrective action
Replace compete module
Remove and clean orifice. Reinstall
Replace compete module
Plug
P107 838