©
200508 3-1
Mechanical gearbox
DIAGNOSTICS
ΛΦ45/55 series
3
1
3. MECHANICAL GEARBOX
3.1 FAULT-FINDING TABLE
COMPLAINT: 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
COMPLAINT: 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 switch does not work properly See "Pneumatic section of gearbox control" fault-
finding table
COMPLAINT: GEARBOX JUMPS OUT OF GEAR
Possible cause Remedy
Adjustment of gearshift cover on gearbox Mount gearshift cover on gearbox without any play
Defective retaining element or wrong type of
retaining element fitted in gearshift cover
Replace retaining element or fit other type of
retaining element
Problem in mechanical gearbox control See "Mechanical gearbox control" fault-finding
table
COMPLAINT: SINGLE H BECOMES DOUBLE H
Possible cause Remedy
Locking plate in control cover not positioned
correctly
Check assembly of control cover
DAF LF Gearboxes and Clutch Service Manual
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