Belarus 892 - Possible Failures in Pneumatic System and Guidelines for Troubleshooting

892-0000010B OM
292
7.7 Possible failures in pneumatic system and guidelines for troubleshooting
List of possible failures in pneumatic system and guidelines for troubleshooting are
shown in Table 7.7.1.
Table 7.7.1
Defect, external manifestation, cause Troubleshootin
g
Slow build-up of pressure in the cylinder
Air leakage from pneumatic system:
 nuts of pipelines, fittings, coupling
clamps are poorly tighten or damaged
Find out leakage sites and eliminate them
by tightening couplings or replacing dam-
aged parts
 rubber sealing of connecting head is
damaged;
Replace damaged sealing
 nut of connecting head sealing ring is
loose;
Tighten it
 mud under connecting head valve ; Clean it
 contact of dust-protecting cover with
valve rod of the connecting head;
Eliminate it
 disturbed adjustment of valve drive
Adjust the brake valve drive as specified in sec-
tion 3.8.2.2 “Check and adjustment of pneu-
matic system brake valve drive”
 disturbed operation of pressure control-
ler;
Dismount it and send to workshop for repair.
 filter of pressure controller is choked Clean the filter of pressure controller
 compressor is broken
Turn to the dealer.
Slow build-up of pressure in the cylinder
Compressor is broken Turn to the dealer.
Pressure in the cylinder drops fast upon diesel shut down
Air leakage along pneumatic system con-
necting elements
Eliminate leakage
Pressure in the cylinder reduces quickly upon pressing brakes
Brake valve is broken. Replace the brake valve
Compressor ejects oil in the pneumatic system
Compressor is broken Turn to the dealer.
Insufficient pressure in the cylinder
Faulty location of pressure control valve
adjusting cap
Adjust pressure control valve as specified in
subsection 3.8.3 « Check and adjustment of
pneumatic system pressure control valve »
Compressor is broken Turn to the dealer.