Multi Pro 5700 - Toro

Pulse Width Modulated (PWM) Valve Solenoid
The Pulse Width Modulated (PWM) Valve which controls
hydraulic flow to the spray pump motor includes an
electric solenoid (Fig. 30). When the spray console rate
switch is depressed, the available current to the PWM
valve solenoid is changed. This solenoid current change
causes a valve shift and subsequent change in hydraulic
flow to the spray pump motor. Testing of the PWM
Valve solenoid can be done without removing the solenoid.
1
3
Testing
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will 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 value
from from the measured value of the solenoid you are
testing.
1. PWM valve
2. Solenoid
2
Figure 30
3. Solenoid connector
1. Make sure ignition switch is off. Disconnect PWM
Valve solenoid electrical connector.
SERIAL NUMBER ABOVE 260000300
2. Measure resistance between the two solenoid connector
terminals. The resistance for the solenoid coil
should be approximately 9.6 ohms.
NOTE: The solenoid coil on machines with serial numbers
below 260000300 is not available as a separate
component (shown in Fig. 30). On machines with serial
numbers above 260000300, the coil is available as a
separate component (Fig. 31). Refer to your parts catalog
for replacement part information.
4
3
1
Electrical
System
3. Reconnect electrical connector to the solenoid.
2
1. PWM valve
2. Solenoid coil
Figure 31
3. O -ring
4. Nut
Multi Pro 5700--D Page 5 - 19 Rev. D
Electrical System