Toro Reelmaster 2000-D, Руководство по обслуживанию

Страница: 113 / 208

If the optional 3 Wheel Drive Kit has been installed, the
3WD selector valve service procedure is as follows.
Selector Valve Service
1. Make sure the manifold is clean before removing the
cartridge valve.
2. If solenoid cartridge is being serviced, remove nut
securing solenoid to the cartridge valve. Carefully slide
solenoid off the valve.
IMPORTANT: Use care when handling the cartridge
valve. Slight bending or distortion of the stem tube
can cause binding and malfunction.
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.
4. Visually inspect the manifold port for damage to the
sealing surfaces, damaged threads, and contamination.
5. Visually inspect cartridge 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 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.
CAUTION
Use eye protection such as goggles when using
compressed air.
6. Clean cartridge valve using clean mineral spirits.
Submerge valve in clean mineral spirits to flush out con-
tamination. Particles as fine as talcum powder can affect
the operation of high pressure hydraulic valves. If car-
tridge design allows, use a wood or plastic probe to push
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.
7. Reinstall the cartridge valve:
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.
IMPORTANT: Use care when handling the car-
tridge valve. Slight bending or distortion of the
stem tube can cause binding and malfunction.
B. Thread cartridge valve carefully into correct man-
ifold port. The valve should go in easily without bind-
ing.
C. Torque cartridge valve using a deep socket from
35 to 40 ft–lb (47 to 54 N–m).
8. If solenoid cartridge was removed:
A. Carefully install solenoid coil to the cartridge
valve making sure that seal is placed on both sides of
the coil.
B. Apply medium strength thread–locking com-
pound to the threads of the valve.
C. Torque nut from 4 to 6 ft–lb (5.4 to 8.1 N–m).
9. After reassembly, if problems still exist, remove valve
and clean again or replace valve.
Hydraulic System
Reelmaster 2000–D Page 4 – 67 Hydraulic System