Operating On Inclines - Volvo A35E Operator's Manual

A Retarder pedal
A35E
A35E
Max. permitted speed when operating downhill
A40E
A40E
Max. permitted speed when operating downhill

Operating on inclines

Uphill operation
The automatic transmission normally makes sure that the
correct tractive force is provided in proportion to the incline.
Under certain conditions, the transmission may start "gear
hunting". This means that the transmission changes up and down
between two gears at short intervals.
The gear-shift hunting is caused by that there is not sufficient
power for operating in the higher gear, but enough for upshifting
from the lower gear.
It is possible to prevent gear-shift hunting in two ways:
1 Select the next lower gear.
or
2 Activate the gear-shift inhibitor function with the switch on the
control panel.
Always engage the longitudinal differential lock / 6-wheel drive
when operating in difficult terrain, see page 86.
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Downhill operation
WARNING!
Do not permit engine revs above 35 r/s (2100 rpm) when
operating downhill.
2
3
When operating down a steep incline with a full load, it
5 3
5 may happen that the exhaust brake and the engine
8
7
12
braking function together do not provide sufficient
11
18
retardation and this leads to an increasing travelling
25 16
speed. If this happens, also the service brakes must be
30 18
31
50
used.
34
57
The machine must not be allowed to roll with the gear
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lever in neutral.
To avoid unnecessary stress to the transmission, the following
operating instructions should be followed:
– Rule: Select the same gear for operating downhill as you would
for operating up the same hill.
If you do not follow this rule, you may lose control of the
machine.
– Lower the speed before the downhill.
2
3
– Plan downhill operation so that in the first instance the retarder
4
6
pedal is used, in order not to overuse the service brakes on the
5
8
8
machine.
12
11
18
17
27
27
43
31
50
35
57
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Operating techniques
Operating on inclines 85