Service Manual

Rev. A
Groundsmaster 7200/7210 Page 5 - 21 Electrical System
Lift Control Manifold Solenoid Valve Coils (Serial Number Above 313000000)
The hydraulic lift control manifold used on machines
with serial number above 313000000 includes two (2)
solenoid valves for system control (Fig. 24). When the
solenoid coils are energized, valve shift occurs to con-
trol hydraulic flow. Electrical testing of the coils can be
done with the coil installed on the hydraulic valve.
The lift control manifold on machines with a serial num-
ber from 313000001 to 314999999 is different than the
manifold used on machines with a serial number above
315000000. Testing of solenoid coils is the same on ei-
ther manifold.
Testing
1. Make sure ignition switch is in the OFF position. Un-
plug wire harness electrical connector from solenoid
valve coil that is t o be tested (Fig. 23 or 24).
2. Identify coil resistance specification by measuring
the coil diameter and coil height (Fig. 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.
3. Using a multimeter (ohms setting), measure resis-
tance between the two (2) connector terminals on the
solenoid valve c oil. The correct resistance for the sole-
noid coil is identified below:
COIL
DIAMETER
COIL
HEIGHT
COIL
RESISTANCE
1.84 in
(46.7 mm)
1.96 in
(49.9 mm)
7.1 ohm
1.41 in
(35.8 mm)
1.43 in
(36.3 mm)
8.8 ohm
NOTE: Solenoid coil resistance should be measured
with solenoid at approximately 68
o
F(20
o
C). Resistance
may be slightly different than listed at different tempera-
tures. Typically, a failed coil will either be shorted (very
low or no r esistance) or open (infinite resistance).
4. If solenoid coil resistance is incorrect, replace sole-
noid coil (see Lift Control Manifold Service (Serial Num-
ber Above 313000000) in the Service and Repairs
section of Chapter 4 - Hydraulic System).
5. After testing the coils, connect wire harness electri-
cal connector to the solenoid valve coil.
1. Lift manifold
2. Raise solenoid (A port)
3. Lower solenoid (B port)
Figure 23
FRONT
1
3
2
SERIAL NUMBER
FROM 313000000
TO 314999999
1. Lift manifold
2. Raise solenoid (S1)
3. Lower solenoid (S2)
Figure 24
1
3
2
FRONT
SERIAL NUMBER
ABOVE 315000000
Figure 25
COIL
DIAMETER
COIL
HEIGHT
Electrical
System