SM08-018-0
Page 3
DESCRIPTION
The solenoid valve stack assembly consists of four
gether, four separate components can be controlled
valve sections, four solenoid assemblies, and an as-
by a single hydraulic source.
sembly kit. By using the four valves asembled to-
THEORY OF OPERATION
NOTE
The valve as held in its normally closed position by a
spring. When the solenoid is energized. the plunger
The theory of operation covers the oper-
assembly forces the spool to shift which opens the
ation of one solenoid valve, however, all
valve. Deenergizing the solenoid causes spring pres-
four solenoid valves operate the same.
sure to shift the spool to its normally closed position.
MAINTENANCE
VALVE STACK ASSEMBLY.
3.
Remove the base of the solenoid valve by either
removing the plug or plate located on the bottom of
the valve.
Disassembly.
1.
Remove the two nuts on each end of the stack
4.
Remove the spring and washer from each end
assembly.
of the spool. Remove the spool and place the spool in
a clean, lintless cloth.
2.
Remove the two mounting brackets.
5.
Remove the plunger assembly from the sole-
3.
Pull the valve assemblies apart and remove the
noid coil. Remove the 0-rings from the plunger
seal plates and 0-rings between the valves and the
assembly.
tie bolts.
6.
Remove the sleeves and spring from the plun-
Assembly.
ger assembly.
1.
Place the seal plates and 0-rings between the
Cleaning and Inspection.
valves and install the tie bolts.
1.
Clean all part in a suitable solvent, with the
2.
Install the mounting brackets and secure in
exception of electrical parts, and dry with air.
place with the attaching nuts.
2.
Check the spool for nicks and scratches, minor
SOLENOID VALVES,
nicks and scratches may be removed with crocus
cloth.
Disassembly.
Assembly.
1.
Remove the fittings from the valve.
NOTE
2.
Remove the four screws from the solenoid as-
It is recommended all 0-rings be re-
sembly and remove the solenoid from the valve
placed with new 0-rings at assembly.
assembly.
