Section 7. Maintenance Procedures
Belarus 80.1/80.2/82.1/82.2/82
Р — Operation and Service Manual
89
Adjustment of the Diesel-Engine Start-
Up Interlock Device
While in service and when carrying out
maintenance MS-3, check the interlock
device switch for proper operation, using
a control lamp or an electric measuring
device (the switch is located on the gear-
box cover, below the cab). To do this, set
the GB lever to its extreme left-hand posi-
tion (i.e., the position of the reduction
gear engagement). In this case, the
switch contacts should be closed (the
control lamp alights or the measuring de-
vice shows readings).
Servicing the Lighting and Light Sig-
naling Devices
Maintenance of lighting and signaling de-
vices is reduced to regular checks of their
serviceability, reliable attachment and
cleanness.
Should any device of outer or inner trac-
tor lightning or signaling fails to operate,
first, check the lamp and wiring, make
sure that the wire terminal connections
are tight, and see that the safety fuse in
the circuit of the given device is not blown
out. For the feed circuits of devices pro-
tected by safety fuses, refer to Section 4
«Drive Controls, Switches and Instru-
ments».
When replacing a burnt lamp, see that no
dust gets into the headlight- or signal light
enclosure. To this end, immediately re-
place damage lenses.
Adjustment of Headlights
For normal illumination if the carriageway
and safety in tractor driving on public roads,
adjust the headlight beams direction. To ad-
just the headlights, proceed as follows:
а) mark out a screen, as shown in Fig.
68; draw the centre line AA of the
headlights on the screen at a dis-
tance «h», equal to the height of the
headlights centres above the floor,
and lines
ВВ
1
and
ГГ
1
at a distance
Д (the headlight centre-to-centre di-
mension in horizontal).
Fig. 68
Measure the headlight centre-to-centre
distance directly on the tractor. When do-
ing so, the tyre inflation pressure should
conform to the recommended values.
b) place the tractor onto a level flat
ground strictly at right angle to the
screen, at a distance of 10
м from the
screen to the headlight lenses. Be sure
that the tractor centre line intersects
the screen at the line 0-0
1
;
c) turn on the headlights on low beam
and first adjust the position of one
headlamp beam (the other headlamp
being covered with a piece of dark
cloth), and then, of the second head-
lamp, after prior loosening the attach-
ment to the brackets.
The headlight is considered to be well ad-
justed, if the centre of the light spot on the
screen is 150 mm below the
А-А line, and
the light spots from both headlights are at
the same height.
