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475 A CRL
800-00167
WORK PORT RELIEF VALVE OPTIONS
WORK PORT RELIEF VALVE OPTIONS
WORK PORT RELIEF VALVE OPTIONS
WORK PORT RELIEF VALVE OPTIONS
WORK PORT RELIEF VALVE OPTIONS
-
Pilot Operated Screw Adjustable Anti-Cavitation Function
The full-flow work port relief valve normally functions when the valve spool is in the neutral position. Fluid is discharged
from the work port passage to the tank return passage of the valve section. The pressure setting is normally higher
than that of the main relief valve.
The pressure setting is normally higher than that of the main relief valve. The two work port relief valves shown below
can be used in any hi-boy section in both the VA/VG20 and VA/VG 35 if the section has the appropriate machining.
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: When installing relief valves, torque them to 80 - 90 ft. lbs.
ITEM
ITEM
ITEM
ITEM
ITEM
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
QTY.
QTY.
QTY.
QTY.
QTY.
1
O-RING
2
2
O-RING
1
3
BACKUP RING
1
4
GASKET WASHER
1
Figure 5
Figure 5
Figure 5
Figure 5
Figure 5
A20/A35 CONTROL VALVE MAINTENANCE CONTINUED...
SYSTEM OVERLOAD RELIEF VALVE
SYSTEM OVERLOAD RELIEF VALVE
SYSTEM OVERLOAD RELIEF VALVE
SYSTEM OVERLOAD RELIEF VALVE
SYSTEM OVERLOAD RELIEF VALVE
The main relief valve protects the hydraulic system against overload pressures. It is located in the inlet housing and it
also can be found in mid-inlet sections used in the valve bank. Figure 5 illustrates the arrangement of the parts and
serviceable seals. This is a cartridge type relief valve and is removed from the control valve as an assembly for
replacement or service.
Figure 6
Figure 6
Figure 6
Figure 6
Figure 6
Figure 7
Figure 7
Figure 7
Figure 7
Figure 7
