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Crawler gear
Some gearboxes have a crawler gear (C).
Crawler gear is not synchronised and can only be used
in low range. First select low range and then engage
crawler gear. Use the crawler gear in difficult starting
conditions, i.e. if you are stuck or when starting with a
heavily loaded truck on a hill.
In order to engage the crawler gear more easily,
engage a synchronised gear before engaging the
crawler gear. This stops the gearbox shafts from
rotating and the engagement teeth are not worn so
much.
Change between low speed range and
high speed range
The gearbox is divided into a low speed range and a
high speed range. The lower figure in each gear
position shows the low speed range. The upper figure
in each gear position shows the high speed range.
1
Change gear as with a conventional gearbox to
the highest speed in the low speed range (3rd or
4th)
2
Raise the range to the upper level (H)
3
Depress the clutch
4
Put the gear lever in neutral
5
Wait until the gearbox has changed up to the high
speed range
6
Engage the next gear (4th or 5th)
7
In high speed range change as with a
conventional gearbox
Change down in the same way.
A range inhibitor prevents shifting to the low speed
range if the speed is higher than 20–40 km/h.
Before each new gear hold the gear lever in neutral for
a moment.
Driving 155
J0007815
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