Belarus 921.6 Operator's Manual page 179

End of Table 6.6.1
Malfunction, evidence, reason
The pressure regulator starts the compressor in idle mode when pressure is below 0.77 -
0.80 MPa and starts it in operating mode when pressure is less than 0.65 MPa or over 0.70
Cavities and channels of the pres-
sure regulator are clogged.
Incorrect position of the pressure
regulator adjusting cover.
The pressure regulator rubber parts are
damaged or springs settling.
Skewness or sticking of the adjusting part
spool in the pressure regulator.
The pressure regulator actuates frequently (activates the pneumatic compres-
sor) without taking air off the receiver
Air leakage from the pneumatic sys-
tem or the pressure regulator, the
pressure regulator
valve is damaged.
The pressure regulator adjusting
cover is too tightened.
Seized the balancing piston of the
pressure regulator.
Clogged output openings in the
pressure regulator cover.
Air is not fed into the connecting hose through the pressure regulator air take-
off valve
The air take-off valve rod in the
pressure regulator is not sufficiently
recessed.
The pressure regulator switched the
pneumatic compressor to idle mode.
Brakes of trailer agricultural machine are operating inefficiently
Incorrectly adjusted the brake valve
actuator.
Brake valve is malfunctioning.
The trailer agricultural machine brake system
operates incorrectly
Brakes of trailer agricultural machine are released slowly
Incorrectly adjusted the brake valve
actuator.
Brake valve is malfunctioning.
The trailer agricultural
brake system operates incorrectly
ATTENTION: WHILE REMEDYING THE PNEUMATIC SYSTEM FAULTS, IT IS ALLOWED
TO PERFORM WORKS INVOLVING THE PRESSURE REGULATOR ADJUSTMENT AND RE-
PAIRING ON YOUR OWN ONLY AFTER THE TRACTOR WARRANTY PERIOD IS FINISHED.
OTHERWISE, THE PRESSURE REGULATOR WARRANTY WILL BE INVALIDATED. TO RE-
PAIR AND ADJUST THE PRESSURE REGULATOR (INCLUDING WHILE PERFORMING MT-3)
DURING THE TRACTOR WARRANTY PERIOD IT IS NECESSARY TO CONTACT THE DEAL-
ER!
Wash and clean the pressure regulator.
Adjust the pressure regulator.
Replace damaged parts of send the pressure regula-
tor for repairs.
Provide for the spool mobility, lubricate it or send the
regulator for repairs.
Find and remedy air leakages.
backpressure
The regulator operates in safety valve mode
Adjust the pressure regulator.
Disassemble the pressure regulator and remedy sei-
zure.
Clean the output openings.
Fully screw the nut of the connecting hose on the fit-
ting.
Decrease pressure in the receiver to below 0.65
MPa.
Adjust the brake valve actuator.
Replace the brake valve.
Remedy fault in the trailer agricultural machine brake
system.
Adjust the brake valve actuator.
Replace the brake valve.
machine Remedy fault in the trailer agricultural machine brake
system.
Malfunction remedy
MPa.
179
921.6-0000010 OM