
Apr. 2007
7
-31
DSC48
5.6.2 PROBLEMS INVOLVED WITH TURNING AND CORNERING
Symptom
Cause
Action
The combine harvester
cannot be turned (direction
control cylinder) and the
reaping unit cannot be lifted
(reaping control cylinders).
• Faulty ground of the threshing controller
• Faulty ground wiring in the threshing controller
• Main wiring connector of
the threshing controller
• Threshing
controller
All of the direction control
cylinders (LH/RH) do not
operate.
• Faulty direction control lever switch
• Faulty ground wiring in the threshing controller
• Power is not supplied to the steering control
solenoids (LH/RH).
• Direction control lever
switch
• Threshing
controller
• Main wiring connector of
the MICOM unit
Only either the LH or RH
direction control cylinder
operates.
• Power is not supplied to the right (or left) turn relay.
• Faulty direction control lever switch (LH or RH)
• Faulty right (or left) turn relay coil (open circuit)
• Main wiring connector of
the threshing controller
• Direction control lever
switch
• Threshing
controller
The direction control cylinder
(LH or RH) operates
even with the power steering
lever is kept in the neutral
position.
• Improperly installed direction control lever switch
• Faulty N.O. (normally open) contact of the right (or
left) turn relay
• Ground between the steering control solenoid (RH
or LH) and threshing controller or the MICOM unit
• Correct
the
direction
control lever switch's
installed position
• Threshing
controller
• Main wiring connector of
the threshing controller
(power)
The reaping unit is lifted by
moving the power steering
lever to the left or right
when the reaping unit safety
switch is in the "LOCK"
position.
• Power is not supplied to the threshing controller.
• Power to the threshing
controller (control fuse)
The combine harvester is
not braked when tilting the
power steering lever to the
end position. (no turning)
• Incorrectly adjusted power brake cable
• Defective low pressure relief valve of the valve unit
• Defective variable relief valve
• Adjust power brake cable
• Adjust
or
replace
• Replace (see page 6-7)
Summary of Contents for DSC48
Page 1: ...DSC48 COMBINE HARVESTER WORKSHOP MANUAL...
Page 2: ......
Page 4: ......
Page 6: ......
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Page 38: ...MEMO...
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Page 136: ...MEMO...
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Page 160: ...MEMO...
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Page 196: ...MEMO...
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Page 251: ...Apr 2007 7 11 DSC48 2 3 WIRING DIAGRAM 417W717A...
Page 262: ...7 22 Apr 2007 DSC48 4 3 WIRING DIAGRAM 417W723A...
Page 281: ...417W758B B ON GND B GND 7 2 CIRCUIT DIAGRAM Apr 2007 7 41 DSC48...
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Page 285: ...DSC48 INDEX...