Possible reasons

Exclusion methods

1.Leakage at the connection part of the gas process pipeline.
2.Leakage of piston rings or air valves.
3.The resistance loss of the air valve is too large.
4.Faults such as loose connecting nuts between cylinders,or loose sealing of safety valves between cylinders and cylinder heads can cause gas leakage.
5.The first stage clearance volume is too large.
6.The packing seal leaks outward.

1.Under pressure,use soapy water to inspect all connection parts,identify and eliminate any leaks,and replace them if necessary.
2.Check the piston rings or gas valves and replace them if necessary.
3.Check or replace the air valve.
4.Tighten the nut and inspect and grind the sealing surface.
5.Adjust the clearance volume.
6.Repair the packing and replace relevant parts if necessary.

Possible reasons

Exclusion methods

1.The pressure gauge is faulty.
2.The air valve is not working properly and leaks.
3.There is gas leakage in the gas pipeline.
4.Air leakage from the packing.
5.The valve plate is damaged,the spring is broken or loses elasticity.
6.The cooling effect of the cooler is poor.

1.Check the pressure gauge or replace it.
2.Check or replace.
3.Check the compressed gas process,identify the cause and eliminate it.
4.Repair the packing and replace relevant parts if necessary.
5.Replace the air valve.
6.Clean the dirt on the cooler.

Possible reasons

Exclusion methods

1.The collision sound occurs when metal blocks(such as valve discs,springs,etc.)fall between the cylinder head and cylinder.
2.The roughness of the piston and cylinder mirror surfaces is damaged,causing mutual adhesion and peeling.
3.The air valve is loose.
4.The connecting nut between the differential pistons is loose.
5.The nut of the connecting rod bolt is loose.
6.The crosshead pin is stuck or displaced.
7.The wear of the connecting rod big end bearing shell causes excessive clearance.
8.The bearing cover is loose.

1.Stop the car in a timely manner to remove the metal block.
2.Remove for maintenance.
3.Check and tighten the air valve.
4.Lock the nut.
5.Check the nuts and tighten them according to regulations.
6.Check the crosshead pin and connecting rod small end copper sleeve,and replace them if necessary.
7.Replace the large end tile.
8.Tighten the nut on the bearing cover.

Possible reasons

Exclusion methods

1.There is not enough lubricating oil in the crankcase.
2.The crude oil filter is contaminated or blocked.
3.The fine oil filter is blocked.
4.The oil pressure gauge is malfunctioning.
5.The oil pump pipeline is blocked or damaged.
6.The oil pump is out of action.
7.The quality of the lubricating oil does not meet the regulations,and the viscosity is too low.
8.Excessive clearance in the lubrication area.
9.The overflow valve has failed.

1.Add lubricating oil to the specified position.
2.Cleaning.
3.Replace.
4.Replace the oil pressure gauge.
5.Repair or replace the oil pump pipeline.
6.Check the sealing condition of the inlet and outlet surfaces of the oil pump.
7.Replace the lubricating oil with a quality that meets the regulations.
8.Adjust the clearance of the lubrication area.
9.Adjust the overflow valve.

Possible reasons

Exclusion methods

1.Excessive dirt in the cooling pipe can affect the cooling effect.
2.The air valve is leaking.
3.The piston ring is damaged or poorly sealed,causing gas to flow between the two ends of the cylinder.

 1.Remove dirt.
2.Replace the air valve.
3.Repair or replace the piston ring.

Possible reasons

Exclusion methods

1.The quality of lubricating oil is not good.
2.The assembly clearance of the motion mechanism is too small or there are hard metal particles sandwiched in the middle.
3.Poor combination clearance of various moving parts.
4.The viscosity of the oil is not suitable for the lubrication of this machine.

1.Replace with lubricating oil that meets the regulations.
2.Readjust the gap and clean the metal particles.
3.Adjust the gap to meet the specified value.
4.Replace with suitable lubricating oil.