Toro Reelmaster 3100-D Service Manual page 190

Solenoid Operated, Relief and Logic Control Cartridge Valves
Hydraulic System: Service and Repairs
Note: The hydraulic manifold shown in
These plugs have a tapered sealing surface on the plug head that is designed
to resist vibration induced plug loosening. The zero leak plugs also have an
O-ring to provide a secondary seal. If zero leak plug removal is necessary, lightly
rap the plug head using a punch and hammer before using an allen wrench to
remove the plug: the impact will allow plug removal with less chance of damage
to the socket head of the plug. When installing plugs into the manifold, torque
plugs to the values identified in
1. Make sure that the manifold is clean before removing the cartridge valve
and seal kit.
2. If solenoid valve is to be removed from manifold, remove nut securing
solenoid to the cartridge valve. Carefully slide solenoid and O-rings (if
equipped) off the valve.
Use care when removing cartridge valves. Slight bending or
distortion of the stem tube can cause binding and malfunction. Make
sure that the deep well socket fully engages the valve base.
3. Remove cartridge valve from manifold with a deep well socket wrench.
Remove seal kit from valve.
4. Visually inspect the manifold port and cartridge valve for damage to sealing
surfaces, damaged threads, and contamination.
A. Contamination may cause valves to stick or hang up. Contamination
can become lodged in small valve orifices or seal areas causing valve
malfunction.
B. If valve sealing surfaces appear pitted or damaged, the hydraulic system
may be overheating or there may be water in the system.
Use eye protection such as goggles when using compressed air.
5. Cleaning cartridge valves:
A. For non-solenoid operated valves:
Submerge valve in clean mineral spirits to flush out contamination. If
valve design allows, use a probe to push the internal spool in and out 20
to 30 times to flush out contamination. Particles as fine as talcum powder
can affect the operation of high pressure hydraulic valves. Clean and
dry cartridge with compressed air.
B. For solenoid operated valves:
Temporarily install solenoid on cartridge valve and connect a 12
volt power source to the solenoid. While energized, flush out any
contamination with a nonflammable aerosol brake cleaner. De-energize
the solenoid. Repeat the flush while energized procedure 5 or 6 times.
Particles as fine as talcum powder can affect the operation of high
pressure hydraulic valves. Remove solenoid from cartridge.
Figure 89
Figure 89.
IMPORTANT
CAUTION
Page 5–114
uses several zero leak plugs.
Reelmaster ® 3100-D/3105-D
20252SL Rev A