Solenoid Operated Cartridge Valves (Fig. 58)
Make sure the manifold is clean before removing
C. Torquecartridge valve using a deep socket to 35
ft--lb (47 N--m).
1.
the valve(s).
D. Make sure anew O--ringis ateach end oftheso-
lenoid coil. Install solenoid coil to the cartridge
valve. Apply “Loctite 242” or equivalent to the
threads of the valve. Torque nut to 15 in--lb (1.7
N--m).
2.
valve. Slide solenoid and both O--rings off the valve.
Remove nut securing solenoid to the cartridge
Note:
Use care when handling the cartridge valve.
Slight bending or distortion of the stem tube can cause
binding and malfunction.
E. If problems still exist, remove valve and clean
again or replace valve.
3.
Remove seal kit.
Remove cartridge valve with adeep socket wrench.
Cartridge Relief Valves (Fig. 58)
1.
the cartridge valve and seal kit.
Make sure the manifold is clean before removing
4.
to the sealing surfaces, damaged threads, andcontami-
nation.
Visually inspect the port in the manifold for damage
2. Remove cartridge relief valve.
5.
ing surfaces and contamination.
Visually inspect cartridge valve for damaged seal-
3. Visually inspect port in the manifold for damage to
thesealingsurfaces,damagedthreads,andcontamina-
tion.
A. Contamination may cause valves to stick or
hang up. Contamination can become lodged in
small valve orifices or seal areas causing malfunc-
tion.
4. Visually inspect cartridge relief valve for damaged
sealing surfaces and contamination.
A. Contamination may cause valves to stick or
hang up. Contamination can become lodged in
small valve orifices or seal areas causing malfunc-
tion.
B. If spool valve (8) sealing surfaces appear pitted
ordamaged,thehydraulicsystemmaybeoverheat-
ing or there may be water in the system.
B. If sealing surfaces appear pitted or damaged,
the hydraulic system may be overheating or there
may be water in the system.
CAUTION
Use eye protection such as goggles when using
compressed air.
CAUTION
6.
Clean cartridge valve using clean mineral spirits.
Use eye protection such as goggles when using
compressed air.
Submerge valve in clean mineral spirits to flush out con-
tamination. Useaprobetopushtheinternalspoolinand
out 20 to 30 times to flush out contamination. Particles
asfineastalcumpowder canaffecttheoperation ofhigh
pressure hydraulic valves. Use compressed air for
cleaning.
5.
Cleancartridge reliefvalveusingcleanmineralspir-
its. Submerge valve in clean mineral spirits to flush out
contamination. Particles as fine as talcum powder can
affect the operation of high pressure hydraulic valves.
Use compressed air for cleaning.
7.
Reinstall the cartridge valve:
A. Lubricate new O--rings and backup rings of seal
kit with clean hydraulic oil and install. The O--ring
and backup ring must be arranged properly on the
cartridge valve for proper operation and sealing.
6. Reinstall the cartridge relief valve:
A. Lubricate new O--ring and backup ring of seal kit
with clean hydraulic oil and install. The O--ring and
backup ring must be arranged properly on the car-
tridge valve for proper operation and sealing.
B. Thread spool valve carefully into port. The valve
should go in easily without binding.
B. Thread cartridge relief valve carefully into the
applicable port. The valve should go in easily with-
out binding. Torque valve to 35 ft--lb (47 N--m).
Note:
Use care when handling the cartridge
valve. Slight bending or distortion of the stem tube
can cause binding and malfunction.
Greensmaster 3250--D
Page 4 -- 91
Hydraulic System (Rev. I)
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| Language | English |
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