Hydraulic Solenoid Valve Coils - Toro Reelmaster 7000-D Service Manual

Hydraulic Solenoid Valve Coils

Numerous hydraulic solenoid valve coils are used on
the hydraulic control manifolds of Reelmaster 7000−D
machines. The solenoid valve coils are energized by the
Toro Electronic Controller (TEC) to provide hydraulic cir-
cuit control.
Two (2) different solenoid valve coils are used on the Re-
elmaster 7000−D. A coil can be identified by measuring
it's height and diameter (Fig. 61). Testing of the coils can
be done with the coil remaining on the hydraulic valve.
NOTE: To assist in troubleshooting, identical solenoid
coils can be exchanged. If the problem follows the ex-
changed coil, a problem with the coil likely exists. If the
problem remains unchanged, something other than the
solenoid coil is the problem source (e.g. switch, circuit
wiring, hydraulic problem).
Testing
1. Park machine on a level surface, lower cutting units,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Locate hydraulic valve solenoid coil to be tested (see
Chapter 5 − Hydraulic System in this manual). Identify
coil by measuring the coil diameter and coil height
(Fig. 61).
3. Disconnect wire harness connector from coil.
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 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 correct resistance for the sole-
noid coil is identified below:
NOTE: Solenoid coil resistance should be measured
with solenoid at approximately 68F (20C). Resistance
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).
5. If solenoid coil resistance is incorrect, replace sole-
noid (see Hydraulic Solenoid Valve Coil in this chapter).
Electrical System
COIL
DIAMETER
1.840 inch
(46.7 mm)
1.410 inch
(35.8 mm)
6. If the solenoid coil tests correctly and a circuit prob-
lem still exists:
A. Check wire harness (see Electrical Schematic
and Wire Harness Drawings in Chapter 10 − Foldout
Drawings in this manual).
B. Use the InfoCenter Display to check specific TEC
output operation (see InfoCenter Display in this
chapter).
7. After testing is completed, connect wire harness
connector to the solenoid coil.
Page 6 − 56
COIL
DIAMETER
HEIGHT
Figure 61
COIL COIL
HEIGHT RESISTANCE
1.960 inch 7.1 ohm
(49.9 mm)
1.430 inch 8.8 ohm
(36.3 mm)
Reelmaster 7000−D
COIL