Belarus 2022.6 Operator's Manual page 198

End of Table 6.8.1
Failure,
external manifestation, cause
Pressure regulator engages compressor for idle stroke when pressure is below
0.77...0.80 MPa, and for operating stroke when pressure is below 0.65 MPa or over
Dirt accumulation in cavities and
channels of pressure regulator
Faulty location of the pressure
regulator adjusting cap
Damaged rubber parts of pressure
regulator, spring shrinkage
Tilting, deadlock of spool of the
pressure regulator adjusting part
Pressure regulator gets actuated frequently (engages the pneumatic compressor)
Air leakage from the pneumatic
system or pressure regulator, fail-
ure of the back-pressure regulator
Pressure regulator operates in the mode of pressure-relief valve
Pressure regulator adjusting cap is
turned for a big value
Pressure regulator dummy piston
jamming
Clogged outlet ports in the pres-
sure regulator adjusting cap
There is no air feeding in the connecting hose through air bleeding valve of pres-
Insufficient sinking of air bleeding
valve rod in the pressure regulator
Pressure regulator changes the
pneumatic compressor for idle
stroke
Brake valve drive got out of ad-
justment
Brake valve failure
Failure in the trailer brake system
Brake valve drive got out of ad-
justment
Brake valve failure
Failure in the trailer brake system
ATTENTION: WHILE TROUBLESHOOTING IN THE PNEUMATIC SYSTEM, ALL
SELF-MAINTAINED OPERATIONS RELATED TO PRESSURE REGULATOR ADJUST-
MENT AND REPAIR, ARE ALLOWED AFTER THE TRACTOR GUARANTEE PERIOD
TERMINATION. OTHERWISE THE PRESSURE REGULATOR SHALL BE WITHDRAWN
FROM AFTER-SALES SERVICE. TO REPAIR OR ADJUST YOUR PRESSURE REGU-
LATOR (INCLUDING MS3) DURING TRACTOR GUARANTEE PERIOD CONTACT
YOUR DEALER!
0.70 MPa
Rinse and clean the pressure regulator
Adjust the pressure regulator
Replace damaged parts or send them to a repair
workshop
Provide freedom of the spool movement, lubricate
it or send the pressure regulator to a repair work-
shop
without air bleeding from the receiver tank
Detect the reason and stop air leakages
Adjust the pressure regulator
Disassemble the pressure regulator and eliminate
jamming
Unclog outlet openings
sure regulator
Screw the nut of the connecting hose on the outlet
and tighten it
Decrease pressure in the receiver tank to the value
below 0.65 MPa
Ineffective operation of trailer brake
Adjust the brake valve drive
Replace the brake valve
Eliminate the failure in the trailer brake system
Trailer brakes are slowly released
Adjust the brake valve drive
Replace the brake valve
Eliminate the failure in the trailer brake system
Troubleshooting
198
2022.6-0000010 OM