Section 7. Maintenance Procedures
Belarus 80.1/80.2/82.1/82.2/82
Р — Operation and Service Manual
89
7.6.12 TRACTOR ELECTRICAL
EQUIPMENT
Maintenance or repair jobs on the tractor
electrical equipment sometimes necessi-
tates dismantling of respective units from
the tractor or their temporary disconnec-
tion from the wiring. In such cases always
turn the frame-ground switch OFF.
Connection or disconnection of cable
connector assemblies should be made on
a de-energized tractor, only.
Relationship between electrolyte
density at 25 °
С and the state of
storage battery charging
Table 11
Fully charged
storage battery
Discharge of storage
battery
25% discharged 50% discharged
1.30
1.26
1.22
1.28
1.24
1.21
1.26
1.22
1.18
1.24
1.20
1.16
1.22
1.18
1.14
Maintenance and Checks of the Stor-
age Battery
Keep the storage battery clean and in an
almost fully charged state at all times.
Electrolyte density of a fully charged stor-
age battery should be:
• for cold and temperate climate —
0,02
0,01
1,28
g/cm
3
at 25 °
С;
• for tropical climate —
0,02
0,01
1,23
g/cm
3
at 25 °
С.
Be sure that the electrolyte density differ-
ence in the battery cells does not exceed
0.02 g/cm
3
.
Regularly wipe off any accidentally spilled
electrolyte, dirt and dust from the storage
battery surfaces with the use of a clean cloth
wetted in a 10% solution of ammonia spirit
or soda ash.
See to that the filler holes in the battery
cell covers are closed tight with plugs and
the vent holes in the plugs are not
clogged. Regularly clean oxidized termi-
nals of the storage battery and the cable
leads; cover them with a fine coat of petro-
latum. The storage batteries on tractors
should be kept in an almost fully charged
state; they should not be allowed to dis-
charge by more than 50 percent in sum-
mer and 25 percent in winter. Be sure that
the level of electrolyte in all the storage
battery cells is within the marks on the bat-
tery craddle or 10-15 mm above the sepa-
rators. The degree of storage battery dis-
charge is determined by the density of
electrolyte or the amount of electrical en-
ergy (voltage). Checks of storage battery
state is carried out in specialized work-
shops.
Maintenance of the Alternator
Since the alternator has no ribbing sur-
faces and its enclosed ball bearings re-
quire no additional lubrication, the alter-
nator will need but very little attention in
service.
Before starting to work on a daily mission,
check the alternator for good repair as
shown by the voltage indicator; meaning
of the indicator readings are given in Sec-
tion 4, «Drive Controls, Switches and In-
struments».
Before servicing the alternator, clean it
from dust and dirt. Check the condition
and reliable fastening of cable connec-
tions to the alternator, attachment of the
alternator to the diesel-engine, the ball
bearing for excessive axial and radial
plays (by increased noise of the alterna-
tor).
When servicing the tractor electrical
equipment, it is essential to keep to the
recommendations below, lest the alterna-
tor components be made inoperative.