24
4.5
GFS Trouble Shooting
Symptom
Pos
sible cause
Possible solution
GFS master switch on, GFS gauge
wheel does not drop to ground, no
green lights in cab
Check that the
DOWN
boom control
switch for that side has been tapped
Tap DOWN switch, green light should
come on, boom should drop
When G
FS master turned on, no
action
Green indicator light on the electrical
control box at rear of machine should
be lit when there is 12vDC + to the in
cab control and GFS master switch
turned on.
Blown fuse in the circuit
Input wire disconnected near in cab
control,
Replace fuse in power source
Check voltage present into cab
control box
If no green LED on electronic module
when power to the module, replace
the module
(part # 227548)
During start of field test, green cab
light comes on, boom won t drop
Gre
en light indicates there is power
being sent from the in cab control to
the solenoid valve for that side of
GFS.
Check for magnetism at GFS coil for
that side
If no magnetism, check for 12v on
coil and circuit back
***If magnetism, consider lowering
system
pressure by turning set screw
CCW 1/12 turn on GFS valve
During start of field test, green cab
light comes on, boom wheel drops 6
ft in less than 2 seconds
Pressure in GFS valve too low
Reduce boom weight by washing off
mud and crop residue
***Increase pressure by turning set
screw on GFS valve 1/12 turn CW
GFS gauge wheel stays up in air for
too long (50 ft ) after crest of rise
Pressure in GFS too high
***Consider lowering system
pressure by turning set screw CCW
1/12 turn on GFS valve
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