Belarus 1021, Руководство по эксплуатации

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BELARUS-1021/1021.3 Operating manual
130
7.6 Troubleshooting of pneumatic system
Trouble, its manifestation Remedy
1. Insufficient air pressure in the cylinder, the pressure increases slowly and drops
rapidly when the engine is stopped
Air leakage from the pneumatic system due
to the following reasons:
- weakly tightened nuts of the piping, valves,
tension bands;
- damaged seal ring of the coupling head;
- weakened tightening of the coupling head
connecting piece;
- dirty valve of the coupling head;
- dust cover contact with the valve of the
coupling head;
- weakened fastening of the pressure
regulator covers, leakage of its seals;
- clogged filter of the pressure regulator.
Eliminate leaks by tightening the
connections.
Replace the damaged seal ring.
Tighten up the connecting piece.
Clean the valve.
Eliminate the contact.
Tighten up the bolts fastening the covers,
eliminate leakage in the seals.
Rinse the air filter and blow it with
compressed air.
Faulty air compressor. Unmount the air compressor and send it in
for repair.
2. Air pressure in the cylinder drops quickly when pressing the brake pedal
Faulty brake valve Replace the brake valve
3. Increased release of oil to the pneumatic system
Faulty air compressor Unmount the air compressor and send it in
for repair.
4. Insufficient pressure in the receiver
Air leakage from the pneumatic system. Eliminate air leaks as described above.
Disturbed position of the adjusting cap of
the pressure regulator.
Adjust the pressure regulator as specified in
5.8 Checking and adjusting pneumatic system
pressure regulator of this Manual.
Faulty air compressor Unmount the air compressor and send it in
for repair.
5. Pressure regulator switches the compressor to idle at a pressure of less than 0.77 ... 0.80
MPa, and to a stroke less than 0.65 MPa or more than 0.70 MPa
Dirt in cavities and channels of the pressure
regulator.
Wash and clean the pressure regulator.
Disturbed position of the adjusting cap of the
pressure regulator.
Adjust the pressure regulator as specified in
5.8 Checking and adjusting pneumatic system
pressure regulator of this Manual.
Damaged rubber components of the pressure
regulator, shrinkage of springs.
Replace the damaged parts or send the
pressure regulator for repair.
Skewed, hanging spool of the regulating part
of the pressure regulator.
Ensure mobility of the spool, lubricate it or send
the pressure regulator for repair.