Search And Elimination Of Failures In Operation Of Heating Plugs; Search And Elimination Of Failures In Test Instruments Operation Located On The Dashboard - Belarus 1822.3 Operator's Manual

7.15.7 Search and elimination of failures in operation of heating plugs

Failures in operations of heating plugs can be detected by hampered engine start at
subzero temperatures (in case tractor operating conditions and operability of other systems
are observed). Under mode of indicating lamp operation of heating plugs on HG1 block, gov-
erned by control unit of heating plugs 8, different heating plugs operational failures, listed in
subsection 3.21.2 "Heating plugs operation principle" are possible. The specified failures
should be eliminated prior to the beginning of tractor operation.
7.15.8 Search and elimination of failures in test instruments operation located
on the dashboard
7.15.8.1 General information.
On tractors "BELARUS – 1822.3/1822 .3/2022.3/2022 .3" oil pressure sensors in
the engine BP1, oil pressure sensors in the transmission BP2, air pressure sensors in the
pneumatic system BP3, sensors of cooling liquid temperature in the engine BK1 are used
together with the instrument board for displaying tractor systems operation. Operation of
fuel volume indicator of the instrument board is carried out by the fuel volume sensor sig-
nal ( ) – BN1.
On the integrated indicator:
- operation of the engine tachometer indicator is carried out by the phase winding
signal «W» of alternator G1;
- operation of tractor movement speed indicator is carried out by the signal from
rear wheel BV1 and BV3 rated speed sensor;
- operation of RPTO rpm indicator is carried out by the signal from rear PTO BV2
rated speed sensor.
Emergency operation modes of tractor systems are shown by the following sensors:
- emergency (low) oil pressure in the engine SP2;
- emergency (low) air pressure in the pneumatic system SP4;
- emergency (high) cooling liquid temperature SK1;
- clogged air cleaner filter SP1;
- decrease in oil pressure in the HSC system SP3;
- low level of hydraulic-brake fluid SL1;
7.15.8.2 The instrument board, integrated indicator and control lamp unit do not operate
with the starter and instruments SA10 switch key in the position "I"
) Check operability of fuse « » (15 ) on the fuse block F4. In case of failure - re-
place the fuse.
b) If the fuse operates properly, check by means of a tester if there is power supply
on the joining cable sockets at the dashboard according to the electrical circuit of Annex B.
If there is power supply, replace faulty instruments. In case there is no power supply,
check operability of starter and instruments SA10 switch, availability of voltage on terminal
"30" of switch SA10 as well as operability of electrical circuits from the switch SA10 to the
instruments 1, 2 and HG1. If there are circuit breakages – eliminate them In case the
switch SA10 is faulty– replace it.
c) If there is no power supply on terminal "30" of the switch SA10, check operability
of fuse « » (30 ) in the fuse block F1. If the fuse is faulty – replace it.
d) If the fuse « » (30 ) operates properly in the fuse block F1, check circuit integrity
from the fuse block F3 to the starter and instruments switch SA10. In case there are circuit
breakages – eliminate them.
7.15.8.3 The instrument board does not operate when the engine is on, the inte-
grated indicator only displays the annunciator of on-board increased voltage.
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