Lovol KM/4L22 User Manual

MAINTENANCE MANUAL OF ENGINE
138
5. Air intake obstructed
Steps
Inspection
position
Fault causes
Troubleshooting
1
Air filter
The filter element is damaged, and the
air filter is blocked.
Replace the filter element or clean
the air filter.
2
Air intake
pipeline
The air intake pipeline is blocked.
Clean the air intake pipeline.
6. Black smoke
Steps
Inspection
position
Fault causes
Troubleshooting
1
Load
Overload operation
Reduce the load within specified
range.
2
Fuel injection
pump
The plunger spring of the fuel injection
pump is broken, or fuel delivery error of
cylinders exceeds the specified range.
Replace or repair the fuel injection
pump (Refer to Section 5, Chapter
3 of this Part)
3
Valve clear-
ance
The valve clearance is inappropriate.
Adjustment (Refer to Section 1,
Chapter 3 of this Part)
4
Valve
The valve spring is loosened or the
valve is not sealed tightly.
Replace the spring or grind the
valve (Refer to Section 4, Chapter
1, Part II)
5
Fuel supply
advance angle
The fuel supply advance angle is insuf-
ficient.
Adjustment (Refer to Section 1,
Chapter 3 of this Part)
6
Air intake
system
The air filter element or air intake pipe-
line is blocked.
Replace or clean
7
Fuel injector
The fuel is atomized poorly, and there is
fuel leakage from the fuel injector noz-
zle.
Repair or replace (Refer to Sec-
tion 6, Chapter 3 of this Part)

Lovol KM/4L22 Specifications

General

Brand	Lovol
Model	KM/4L22
Category	Engine
Language	English