5.
Visually inspect cartridge valve for damaged sealing
7. Reinstall the cartridge valve:
surfaces and contamination.
A. Lubricate new seal kit components with clean hy-
draulic oil and install on valve. The o--rings, sealing
rings, and backup rings must be arranged properly
on the cartridge valve for proper operation and seal-
ing.
A. Contamination may cause valves to stick or hang
up.Contaminationcanbecomelodgedinsmallvalve
orifices or seal areas causing malfunction.
B. If valve sealing surfaces appear pitted or dam-
aged, the hydraulic system may be overheating or
there may be water in the system.
IMPORTANT: Use care when handling the valvecar-
tridge. Slight bending or distortion of the stem tube
can cause binding and malfunction.
CAUTION
B. Thread cartridge valve carefully into manifold
port. The valve should go in easily without binding.
C. Torquecartridgevalveusingadeepsockettoval-
ue identified in manifold illustration.
Use eye protection such as goggles when using
compressed air.
D. If cartridge is solenoid operated, carefully install
solenoid coil to the cartridge valve. Apply Loctite
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. If car-
tridgedesignallows,useawoodorplasticprobetopush
the internal spool in and out 20 to 30 times to flush out
contamination. Be extremely careful not to damage car-
tridge. Use compressed air for cleaning.
#242
orequivalenttothethreadsofthevalve.Torque
nut to value identified in manifold illustration.
8.
If problems still exist, remove valve and clean again
or replace valve.
Groundsmaster 4500--D/4700--D
Page 4 -- 73
Hydraulic System (Rev. A)
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro Groundsmaster 4500 D, Toro Groundsmaster 4700 D |
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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