Yuchai YC20SR, Руководство по эксплуатации

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Engine power drops
1) Fuel mixed with air -Vent air
2) Oil supply is not smooth -Check and clean
3) Injection timing change -Adjust according to the specified value
4) Injectors work poorly -Check the working pressure and oil injection atomization
5) Air filter is blocked -Clean the filter element
6) Incorrect intake and exhaust valve clearance or valve not sealed -Adjust valve
clearance
7) Bad cylinder gasket, air leakage -Replace the cylinder gasket
8) Injection pump is not working well -Check with after-sales service
9) Engine is overheating -Check if the coolant used is correct. Check if the water
pump and belt are too loose, if so, repair or replace them, and remove the blockage
in the waterway

Engine overheating
1) Coolant level is too low -Add coolant
2) Temperature sensor failure -Change new sensor
3) Air filter blockage - clean the air filter
4) Fan belt loose or defective -Retighten or replace
5) Dirt in the cooling system -Clean
6) Low oil or too much oil -Replace oil

Oil pressure is too low
1) Oil level is too low -Add oil
2) Oil filter blockage -Clean the oil filter
3) Oil leakage in the line -Tighten and replace