Tyre Rotation; Headlamps - TATA Motors Sumo Victa EX Owner's Manual & Service Book

WHEELS AND TYRES, ELECTRICAL SYSTEM
SCHEMATIC DIAGRAM - TYRE ROTATION
RADIAL PLY TYRES

Tyre rotation

Tyre rotation is recommended for achieving identical wear
on each tyre. It is also advisable to change rotating direction
to relieve tyres of continual one way rotation. Regular
rotation of tyres also will prevent abnormal wear. The sketch
indicates a suggested sequence of tyre rotation. Rotate tyres
at specified intervals or earlier depending on operation.
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Headlamps

The head lamp provides two types of light beams; a high
beam to give maximum light well ahead of vehicle, and a low
beam which is shorter and lower so that it will not dazzle the
oncoming drivers and can be use in low visibility area.
The head lamp also incorporates a parking lights.
The head lamps must be properly aligned in order to obtain
maximum road safety, proper road illumination and reduced
glare to oncoming traffic.
It is recommended to check alignment of headlamp beams
periodically and whenever headlamp bulbs are replaced, by
means of a headlamp aligner or with the help of a screen as
shown in figure on the following page.
Adjusting head lamps focus with the help of screen
The vehicle should be parked 10 meters away from screen
with its centre in line with central vertical line on screen, and
screen at right angle to longitudinal axis of the vehicle. The
vehicle should be in unloaded condition with no sag in
suspension springs and all tyres equally inflated.
On the marked up screen as shown in figure, area above
horizontal and inclined lines (shaded) is called 'Dark zone'
and the area below it is called 'The illuminated zone' .
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V E H I C L E M A I N T E N A N C E
1465
0
15 A
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
CENTRE LINE
OF BULB
Each headlamp is aligned individually by masking the other
headlamp. Headlamp is first adjusted for proper height of
low beam by adjusting knob at its top. Light from low beam
should fall below horizontal and inclined lines.
No light should fall above these lines i.e. in 'Dark zone' .
Thereafter lateral adjustment is done by adjusting knob at
bottom of headlamp so that contour of low beam coincides
with contour formed by horizontal and inclined lines below
'Dark zone' .
When properly adjusted, most brightly illuminated area will
be just below the intersection point 'A' of these two lines.
The Second head lamp is adjusted in a similar manner
ELECTRICAL SYSTEM
4000
535 535
1465
DARK SCREEN FOR LEFT
ZONE HAND TRAFFIC
0
15 B
GROUND LEVEL
CENTRE LINE CENTRE LINE
OF VEHICLE OF BULB
without disturbing the position of the vehicle and the screen.
Now switch 'ON' high beam. They will be symmetrical above
points. 'A' and 'B' of intersection of vehicle lines and horizontal
lines. It is possible that high beams may not be exactly
symmetrical but for this reason headlamps should not be
realigned.
Preferably, the alignment should be done in the dark.
No masking of headlamps with black paint is required. If
done, this will reduce the intensity of light.
Head lamp focusing should be carried out in the level 'O'
position (where head lamp leveling switch provided ) of the
switch only.
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