QUANCHAI N485D, Maintenance Manual

Page: 119 / 139

ANHUI QUANCHAI ENGINE CO., LTD
5. Blocked air filter
Seque
nce
No.
Position
tested
Normal Abnormal
1 Air filter
The air filter is not blocked and the
filter element is not damaged.
Clean or replace the filter element.
6. Emission of blue smoke
Seque
nce
No.
Position
tested
Normal Abnormal
1
Piston
components
The piston ring, piston and cylinder
liner show no sign of wear. There is no
carbon deposit on the piston ring. The
engine oil does not get into the
combustor.
Check, clean or replace worn
parts.
2
Engine oil
level
The engine oil level of the oil pan is
within the specified range of the engine
oil gauge.
Check the engine oil level and
drain off excess engine oil.
3 Piston ring
The piston ring is assembled correctly
with the marked side facing the top of
the piston. Reassemble the incorrectly
assembled piston ring, or replace it
with a new one.