Toro Greensmaster TriFlex 3300 Service Manual page 211

NOTE: Solenoid coil resistance should be measured
with solenoid at approximately 68
may be slightly different than listed at different tempera-
tures. Typically, a failed solenoid coil will either be
shorted (very low or no resistance) or open (infinite re-
sistance).
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 Valve Coil
PRV (mow)
S1, S3 and S4 (lift)
S2 (lift)
Leak Detector
5. If solenoid coil resistance is incorrect, replace sole-
noid (refer to appropriate control manifold service pro-
cedures in the Service and Repairs section of Chapter
5 -- Hydraulic System).
NOTE: To assist in troubleshooting, identical solenoid
valve coils can be exchanged. If the problem follows the
exchanged coil, an electrical problem likely exists with
the coil. If the problem remains unchanged, something
other than the solenoid coil is the problem source (e.g.
switch, circuit wiring, hydraulic problem). The mow man-
ifold PRV coil is the same as the lift manifold S2 coil. The
lift manifold S1, S3 and S4 coils are identical.
6. After coil testing is completed, connect wire harness
electrical connector to the solenoid valve coil.
7. Secure all machine components that were removed
to access hydraulic manifold.
Greensmaster 3300/3400
o o
F (20 C). Resistance
Resistance
7.1 ohms
8.8 ohms
7.1 ohms
7.2 ohms
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2
Figure 51
1. Leak detector manifold
1
2. Solenoid valve
Electrical System