DAF 95XF. Manual — part 445
3
DIAGNOSIS
Pneumatic gearbox components
4-2
FAULT: SPLITTERING IMPOSSIBLE
Possible cause
Remedy
Air pressure too low
Check pneumatic system
GV valve defective or incorrectly set
Check and adjust/replace, if necessary
Wrong relay valve fitted for splitter
Fit correct relay valve type
Broken or incorrectly connected air pipes
Check air pipes and replace or connect properly,
if necessary
Wrong selector switch on gear lever
Fit correct switch type
Wrong bore hole plugged in splitter cylinder
Plug correct bore hole
Splitter cylinder is not functioning
Check cylinder and replace, if necessary
FAULT: SPLITTER CYLINDER OPERATES IN REVERSE MODE
Possible cause
Remedy
Incorrect splitter relay valve fitted
Fit correct relay valve type
Incorrect gear lever shifting valve fitted
Fit correct shift valve type
Air pipes connected incorrectly
Check air pipes and connect properly, if
necessary
FAULT: SPLITTERING DELAYED
Possible cause
Remedy
Air pressure too low
Check pneumatic system
Blocked air pipes
Check pipes
GV valve defective or incorrectly set
Check valve and adjust, if necessary
1
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3
Pneumatic gearbox components
DIAGNOSIS
4-3
FAULT: GATE 1/2 NOT SAFEGUARDED
Possible cause
Remedy
Leaking or blocked air pipes
Replace air pipes
No air from neutral-position valve in neutral
position
Check neutral-position valve and replace, if
necessary
Gearbox gate safety valve (B184) defective
Replace gearbox gate safety valve
Electronic unit (D813) of gate safety or CTE not
receiving speed signal
Check the speed signal
Electric unit (D813) of gate safety is not earthed
Replace electric unit of gate safety
No output voltage by CTE
Check CTE and replace, if necessary
Low-gear switch (E561) defective
Replace low-gear switch
FAULT: GATES 1/2 AND 5/6 PERMANENTLY BLOCKED
Possible cause
Remedy
Gearbox gate safety valve (B184) defective
Replace gearbox gate safety valve
Gate safety active in both high and low group
Check low-gear switch (E561)
1
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3
DIAGNOSIS
Pneumatic gearbox components
4-4
1
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3
Gearbox, mechanical
DIAGNOSIS
5-1
5. GEARBOX, MECHANICAL
5.1 FAULT-FINDING TABLE
FAULT: ENGAGING GEARS IS HEAVY
Possible cause
Remedy
Gearbox oil level too low
Top up oil level
Use of oil with incorrect specification in the
gearbox
Fill gearbox with oil of correct specification
Mechanical problem in gearbox control
See fault-finding table “Mechanical gearbox
control”
Clutch plate is not released
See fault-finding table “Clutch”
FAULT: GEARS CANNOT BE SHIFTED
Possible cause
Remedy
Holding element mounted too deep
Check/repair holding element
Mechanical problem in gearbox control
See fault-finding table “Mechanical gearbox
control”
Range switch does not work properly
See fault-finding table “Pneumatic gearbox
components”
FAULT: GEARBOX JUMPS OUT OF GEAR
Possible cause
Remedy
Adjustment of gear box cover
Mount cover on gearbox without any play
Check whether the right type of components
have been fitted
Replace holding element or fit other type of
holding element
Mechanical problem in gearbox control
See fault-finding table “Mechanical gearbox
control”
1
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