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(VI) Air Compressor
Air compressor is the pressure gas source for braking. Its performance will affect the safety of driving.
In order to guarantee the compressor to work reliably, the followings shall be obeyed.
1. Do not increase the pressure setting of the pressure adjusting valve on air cylinder at discretion.
2. Regularly check the drying unit, retaining valve, pressure adjusting valve, unloading valve and
safety valve on the exhausting pipeline of the air compressor for their situations.
3. The impurities and dust in the intake air will affect the sealing performance of valve sheet of the
compressor, which are the main causes for no air inflating and low inflating efficiency. Please clean and
maintain the valve sheet regularly and remove the cylinder head for cleaning every 8000km.
Steps: Remove the four bolts on the top of the cylinder head and take down the head and the valve seat
plate to clean away impurities and dirts on the sealing face of the valve seat by gasoline or diluting
agent. Take down the inlet valve sheet from two locating pins and clean away impurities and dirts on the
sheet by gasoline or diluting agent. Take down the valve sheet from the head, remove the two screws
on the pressing plate for exhausting valve sheet and take down the sheet to clean away impurities and
dirts on the valve sheet, plate and seat by gasoline or diluting agent. After cleaning, the assembly could
be recovered by getting rid of the pad on the head and using special gland bush which is not allowed to
be substituted by common gasket, during which the valve sheet is not allowed to be installed backward.
After assembling, all bolts shall be checked for the tightness. Start the engine and check the pumping
performance of the compressor to confirm whether there is leakage, if yes, clear the fault in time.
