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6. Trailer air brake system
1) Insufficient air pressure
2) IInsufficient brake force, air pressure gauge pointer continuously falls
during brake,
continuous exhaust sounds at exhaust mouth
3) Brake situation not being able to be relieved after loosening brake pedal
Cause Remedies
1. Air pump belt is too loose Adjust tightness of belt or replace belt
2. Pipe connectors leak
Check out the leaking position and remove
breakdowns
3. Inlet and outlet valve of air compressor
not sealed and spring damaged
Grind valve seat, replace spring
4. Piston rings and cylinder lining of air
compressor seriously damaged
Replace piston rings and cylinder lining
5. Filter blocked Clean filter
6. Safety valve is not completely closed or
is not flexible
Check and repair or replace safety valve
7. Cylinder head studs of air compressor is
loose or cylinder gasket leaks
Tightly screw cylinder head studs or replace
cylinder gasket
Cause Remedies
1. Impurity between brake valve core rod
end face and valve
Clean valve seat, remove impurity
2. Valve seat ground or damaged Repair or replace valve seat
Cause Remedies
1. Exhaust clearance too small or no
clearance
Adjusting bolt wound out to increase
clearance, exhaust clearance should be
among 1.5-2mm
2. Balance spring not suitably mounted Remount balance spring
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