DAF CF65, CF75, CF85 Series . Manual — part 289
3
CF65/75/85 series
Pneumatic section of gearbox
DIAGNOSTICS
3-3
SYMPTOM: GATE 1/2 NOT SAFEGUARDED
Possible cause
Remedy
No power supply to the gate protection valve
Check the wiring
Defective gate protection valve (B293)
Replace the gate protection valve
VIC does not receive a speed signal or receives
an incorrect signal
Check speed signal from CTE
Leaking or blocked air pipes
Replace the air pipes
No air from neutral position valve in neutral
position
Check neutral position valve and replace if
necessary
Defective low-range switch (E561)
Replace low-range switch
Faulty VIC electronic unit
Replace electronic unit
SYMPTOM: GATES 1/2 AND 5/6 PERMANENTLY BLOCKED
Possible cause
Remedy
Defective gearbox gate protection valve (B293)
Replace the gearbox gate protection valve
Gate protection active in high and low range
Check low-range switch
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DIAGNOSTICS
Pneumatic section of gearbox
CF65/75/85 series
3-4
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CF65/75/85 series
Mechanical gearbox
DIAGNOSTICS
4-1
4. MECHANICAL GEARBOX
4.1 FAULT-FINDING TABLE
SYMPTOM: ENGAGING GEARS IS HEAVY
Possible cause
Remedy
Gearbox oil level too low
Top up oil level
Oil with incorrect specification in the gearbox
Fill gearbox with oil of correct specification
Problem in mechanical gearbox control
See “Mechanical gearbox control” fault-finding
table
Clutch plate is not released
See “Clutch” fault-finding table
SYMPTOM: GEARS CANNOT BE ENGAGED
Possible cause
Remedy
Retaining element fitted too deep
Check/repair retaining elements
Problem in mechanical gearbox control
See “Mechanical gearbox control” fault-finding
table
Range-change gear does not work properly
See “Pneumatic section of gearbox control”
fault-finding table
SYMPTOM: GEARBOX JUMPS OUT OF GEAR
Possible cause
Remedy
Adjustment of selector shaft housing on gearbox
Mount selector shaft housing on gearbox without
any play
Defective retaining element or wrong type of
retaining element fitted in selector shaft housing
Replace retaining element or fit other type of
retaining element
Problem in mechanical gearbox control
See “Mechanical gearbox control” fault-finding
table
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DIAGNOSTICS
Mechanical gearbox
CF65/75/85 series
4-2
SYMPTOM: GEAR LEVER STUCK IN GATE 3/4
Possible cause
Remedy
Oil leak in gate protection piston
Replace O-ring
SYMPTOM: SINGLE H BECOMES DOUBLE H
Possible cause
Remedy
Locking plate in control cover not positioned
correctly
Check assembly of control cover
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