MTZ 1220.1/1220.3 K. Scheduled technical maintenance
K25
Оperation 28. Filter of the air pressure
regulator in the pneumatic system
To clean the filter element:
• Remove the bolts (1) and cover (2).
• Take out the filter element, wash it in
detergent solution and blow with com-
pressed air.
• Assemble the strainer in the reverse
order.
Оperation 29. Check tightness of
pneumatic system lines
• Bring the air pressure in the pneumatic
system to 6.0 to 6.5 kgf/cm² (by read-
ings of the air pressure indicator on the
dashboard) and stop the engine.
• Check by the pointer that the pressure
drop for 30 minutes did not exceed 2
kgf/cm². Otherwise, find the location of
air leak and fix the fault.
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