Lit. No. 30118, Rev. 00
June 15, 2020
72
TROUBLESHOOTING
NOTE: See the Controls section for details on
control time-outs and wing functions.
The main purpose of the SCAT is to narrow down
a problem as either being electrical or hydraulic.
Follow the steps below to diagnose the problem,
then go to the appropriate test as directed.
1. Verify that harnesses B and C are properly
attached to the solenoid coils. Refer to the
labels on the hydraulic unit and the electrical
schematics in this guide for details.
2. Install the Diagnostic Harness (PN 29290-2)
according to the instructions on the following
pages.
3. When instructed to do so, perform the SCAT
by activating the control for each function and
checking for magnetic pull at all the solenoid
coils. A solenoid coil is magnetized if a
screwdriver held nearby is attracted.
NOTE: When checking for magnetism on the
activated coil, check the inactive coils for stray
magnetism.
Only one coil at a time can be tested for
magnetism.
To test double-stacked coils:
a. Remove the thin nut that holds the stacked
coils on the valve stem. Verify that the
steel spacer washer is in place between
the coils.
SOLENOID COIL ACTIVATION TEST (SCAT)
b. Separate the coils by approximately
1/2" and hold them in that position.
Activate the function that uses one of the
coils. If the coil is magnetized, the steel
washer will be drawn to that coil. Activate
the function for the second coil. If that coil
is magnetized, the steel washer will be
drawn to that side.
c. After testing, retighten the coil nut to
48–60 in-lb.
NOTE: If a control function times out before the
desired coil activation is complete, release the
button and press it again (hand-held control),
or release the lever to the center position,
then move it back into the desired function
(joystick control).
4. Compare the SCAT results with the testing
table on the following page.
If the motor relay LED is not activating
when it should, go to the Motor and Motor
Relay Test section of this guide.
If one or more coils are not magnetized
when they should be, you have an electrical
problem. Using a test light, check the ground
wires (not red) attached to the improperly
acting coil(s) for switched ground while
activating the function that should energize
the coil(s).
If switched ground is present,
go to the
Individual Solenoid Coil Test.
If switched ground is not present,
go to the
Control/Cable/Plow Module Test.
If the motor relay and all coils are working
properly,
you have a hydraulic problem.
Torque Speci
fi
cations
All Solenoid Valves
19–21 ft-lb
All Solenoid Coil Nuts
48–60 in-lb
Motor Relay Terminals, Small
10–15 in-lb
Large
25–35 in-lb
Motor Terminals
50–60 in-lb
Solenoid Cartridge Valves
Coil
Valve Type
Wire Color
S1
SV08-2211
Pink
S2C1
SV08-47D
Dark Green
S2C2
Purple
S3
SV10-43
Yellow
S4
SV08-2211
Blue
S5C1
SV08-47C
Black
S5C2
Orange
S6C1
SV08-47C
Brown
S6C2
White
