Sumo Armoured LBPV - Tata Motors Customer Care

Driving Instructions
Changing from 2H to 4H can be
done at any speed upto 65 km/h.
No pressing of clutch pedal is
required
3. Shifting from 4H to 2H : Turn
the selector knob from 4H to 2H
position. 4WDH indicator on
instrument panel will go off.
Changing from 4H to 2H can be
done at any speed upto 65
km/h. No pressing of clutch pedal
is required.
Free wheeling of front hub : After
shifting from 4H to 2H, for effecting
free wheeling of front wheels,
direction of vehicle motion needs
to be changed. If in4H mode the
vehicle was moving forward then
stop it, wait and then engage
reverse gear of main gear box. If it
was moving reverse in 4H mode
then stop it, wait and then engage
forward gear of main gear box.
(After stopping and changing the
gear the vehicle must travel in
opposite direction for a minimum
of three meters, before free
wheeling takes place.)
4. Shifting from 4H to 4L
Stop the vehicle. Press clutch
pedal. Turn the selector knob from
4H to 4L position. 4WDL indicator
light on instrument panel will blink
a few times and remain on.
5. Shifting from 4L to 4H
Stop the vehicle. Press clutch
pedal. Turn the selector knob from
4L to 4H position. 4WDH indicator
light on instrument panel will blink
a few times and remain on.
CAUTION
In case of malfunctioning in
shifting from 4H to 4L or 4L to
4H, respectively 4L or 4H
indicator light will flash
continuously, Do not march the
vehicle in such a case.
4x4 Operations
Do not use 4H or 4L modes
continuously on dry and hard
surfaced road except for
checking operations.
Limited Slip Differential :
A standard differential delivers torque
equally to each wheel. In case one
wheel loses traction and begins to
spin, the differential distributes the
rotary speed unequally but with same
torque. This can cause the wheel with
good traction to slow down or stop
while the wheel which lost traction
rotates with increased speed. Such a
situation can prevent the vehicle from
moving. The limited slip differential
provided in the rear axle takes care
of such situations. The clutch lock
arrangement provided internally,
ensures that in case one wheel loses
traction and begins to slip, a locking
action takes place which prevents
differential action and both wheels turn
at the same speed.
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