Toro 07390 Workman HDX-Auto, Руководство по обслуживанию, Страница: 176 / 280

Workman HDX Auto Page 6 − 28 Electrical System
Hydraulic Solenoid Valve Coil (Vehicles with High Flow Hydraulics Kit)
Vehicles equipped with the High Flow Hydraulics Kit use
a hydraulic solenoid valve coil for system control (Fig.
39). When the solenoid coil is energized, hydraulic valve
shift occurs to provide hydraulic flow for the attachment.
Testing of the coil can be done with the coil installed on
the hydraulic manifold valve.
Testing
1. Park machine on a level surface, raise bed, stop en-
gine, apply parking brake and remove key from ignition
switch.
2. Install bed support on bed lift cylinder to prevent bed
from lowering.
3. Disconnect wire harness connector from hydraulic
solenoid valve coil.
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter may display a small resistance value (usually
0.5 ohms or less). This resistance is due to the internal
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
4. Using a multimeter (ohms setting), measure resis-
tance between the two connector terminals on the sole-
noid coil. The resistance for the coil should be
approximately 7.1 ohms .
5. After testing is complete, connect wire harness con-
nector to the solenoid coil.
6. Remove bed support from cargo bed lift cylinder and
lower bed.
Solenoid Coil Replacement
1. Remove nut that secures solenoid coil to cartridge
valve.
2. Carefully slide coil from valve.
3. When installing coil on cartridge valve, torque nut to
5 ft − lb (6.8 N − m) .
1. Hydraulic manifold
2. Oil filter
3. Screw (2)
4. Engine mount assembly
Figure 39
FRONT
RIGHT
1
4
2
3
1. Nut
2. Solenoid coil
3. Manifold body
Figure 40
1
2
3
5 ft − lb
(6.8 N − m)