VDL Futura FHD2 E6, Workshop Manual

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Futura FHD2/FMD2 E6
DIAGNOSIS
Vehicle behaviour and performance
1 - 4
2
DD1020_01
1.3 GEAR CHANGING BEHAVIOUR OF A
MANUAL GEARBOX
1.3.1 IT IS DIFFICULT TO CHANGE GEAR
General information
• Is this symptom the result of a technical fault?
• External factors or improper use can also lead to this fault.
• The gears can be difficult to change when changing down
gears in too large steps.
• The gears can be difficult to change if the viscosity of the
gearbox oil is too high due to a low ambient temperature.
Possible cause Remedy
The gearbox oil level is too low. Check the gearbox’s oil level.
There is oil which has the wrong specifications in the
gearbox. Change the gearbox oil.
There is a fault in the mechanical gearbox mechanism. See the fault finding table below: “Faulty mechanical
gearbox mechanism (1)”.
The clutch is not released correctly. Check whether the clutch is released.
There is a mechanical fault in the gearbox. See the fault finding table below: “Faulty mechanical
gearbox mechanism (2)”.
There is a fault in the Servoshift unit. Check the operation of the Servoshift unit.
Faulty mechanical gearbox mechanism (1)
Possible cause Remedy
The gearbox mechanism’s rotating and hinged points
are dry or they knock. Check all of the gearbox mechanism’s rotating and
hinged points for excessive play and/or sufficient lubrica-
tion.
The gearbox mechanism is not configured correctly. Check the gearbox mechanism’s configuration.
Faulty mechanical gearbox mechanism (2)
Possible cause Remedy
The gearbox’s external transfer box is not correctly
adjusted. Check the setting of the external transfer box on the
gearbox.
The holding element is faulty. Check the gearbox’s holding element.
The wrong type of holding element has been fitted in the
gearbox housing. Check the gearbox’s holding element (spring).