Cartridge Valve Service (Fig. 44)
Make sure the manifold is clean before removing the
7. Reinstall the cartridge valve into the manifold block:
1.
A. Lubricate new seal kit components with clean hy-
draulic oil and install on valve. The o--rings, sealing
ringsandbackupringsmustbearrangedproperlyon
the cartridge valve for proper operation and sealing.
valve.
2.
ing solenoid to the cartridge valve. Carefully slide sole-
noid coil off the valve.
If cartridge is solenoid operated, remove nut secur-
IMPORTANT: Use care when handling the valve
cartridge. Slight bending or distortion of the
stem tube can cause binding and malfunction.
IMPORTANT: Use care when handling the cartridge
valve. Slight bending or distortion of the stem tube
can cause binding and malfunction.
B. Thread cartridge valve carefully into manifold
port. The valve should go in easily without binding.
3.
Remove cartridge valve with a deep socket wrench.
Note correct location for o--rings, sealing rings and
backup rings. Remove and discard seal kit.
C. Torquecartridgevalveusingadeepsockettoval-
ue identified in manifold illustration (Fig. 44).
4.
tothesealingsurfaces,damagedthreads orcontamina-
tion.
Visually inspect the port in the manifold for damage
D. If cartridge is solenoid operated, carefully install
solenoid coil to the cartridge valve. Torque nut to val-
ue identified in manifold illustration (Fig. 44).
5.
surfaces and contamination.
Visually inspect cartridge valve for damaged sealing
8. If problems still exist, remove valve and clean again
or replace valve.
A. Contamination may cause valves to stick or hang
up.Contaminationcanbecomelodgedinsmallvalve
orifices or seal areas causing malfunction.
3
2
B. If valve sealing surfaces appear pitted or dam-
aged, the hydraulic system may be overheating or
there may be water in the system.
1
CAUTION
4
Use eye protection such as goggles when using
compressed air.
Figure 45
3.
4.
1.
2.
Manifold assembly
Logic valve (LC1)
Solenoid valve (R1)
Braking valve (BV)
6.
Clean cartridge valve using clean mineral spirits.
Submerge valve in clean mineral spirits to flush out con-
tamination.Particlesasfineastalcumpowdercanaffect
the operation of high pressure hydraulic valves. Be ex-
tremely careful not to damage cartridge. Use com-
pressed air for cleaning.
Groundsmaster 3505--D
Page 4 -- 71
Hydraulic System
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