Hydraulic Solenoid Valve Coils; Service And Repairs 5 - Toro ProPass 200 Service Manual

Hydraulic Solenoid Valve Coils

The ProPass hydraulic system uses several hydraulic
solenoid valve coils for system control. When the sole-
noid coils are energized, hydraulic valve shift occurs to
control hydraulic flow.
Two (2) identical solenoid valve assemblies are used on
machines with standard hydraulic controls (Fig. 24). The
solenoid valve coils used on these assemblies are
identical.
Machines with electronic hydraulic controls use two (2)
different solenoid valve coils (Fig. 25). The double coils
used on the solenoid valves are identical coils. The
single coil used on the proportional flow valve is a differ-
ent coil.
Testing of the hydraulic solenoid valve coils can be done
with the coil installed on the hydraulic valve. The coil
height can be used to identify the resistance of the coil.
Testing
1. Position machine on a level surface. If ProPass is at-
tached to tow vehicle, apply tow vehicle parking brake,
stop engine and remove key from the ignition switch.
Chock wheels to prevent ProPass machine from mov-
ing.
2. Locate solenoid coil that is to be tested on hydraulic
control manifold.
3. Disconnect wire harness electrical connector from
the hydraulic solenoid valve coil that is to be tested (Fig.
24 or 25).
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 (2) connector terminals on the
solenoid valve coil. The resistance for the solenoid coils
is identified below:
Solenoid Coil Height
1.960" (49.8 mm)
2.450" (62.2 mm)
ProPass 200
5. If solenoid coil resistance is incorrect, replace sole-
noid coil (see Solenoid Valve Assembly (Machines with
Standard Hydraulic Controls) or Hydraulic Control Mani-
fold (Machines with Electronic Hydraulic Controls) in the
Service and Repairs section of Chapter 3 -- Hydraulic
System).
6. When testing is complete, connect wire harness
electrical connector to the solenoid valve coil.
ELECTRONIC HYDRAULIC CONTROL MANIFOLD
Resistance
7.1 ohms
4.5 ohms
Page 4 - - 21
STANDARD HYDRAULIC CONTROL MANIFOLD
2
Figure 24
1. Manifold
3
3
Figure 25
1. Manifold
2. 2.450" solenoid coil
1
2. 1.960" solenoid coil
1
3
2
3. 1.960" solenoid coil
Electrical System