EKKO EK20R Service Manual page 9

The cargo fork frame
is skewed
The left and right
elevations are not
synchronized
The over lift speed at
full load cannot meet
the requirements
Or fail to lift
Pressure difference between left and
right
Inconsistent tightness of left and right
chains
The oil channel in the speed limiting
valve is blocked
The oil inlet of the lifting cylinder is
partially blocked
Left and right lifting cylinder stroke is
inconsistent
The height of the left and right cylinders
is inconsistent
The left and right cylinder stroke is too
inconsistent to exceed the cylinder head
adjustment range
Insufficient working oil
The throttle orifice of the speed limiting
valve was blocked with stolen goods
The safety valve is sliding and jammed
Gas leakage of suction pipe weld at filter
screen in oil tank
Loose pipe joint
Oil pump gear and pump body
excessive wear, clearance is too large
The sealing ring in the lifting cylinder is
damaged or overwork and leaks too
much
Multi-way valve body and spool valve
gap is too large, the main valve pressure
is too low
The shunt valve shunt improperly
Air replenishment and air pressure
are consistent
The tightness adjustment is
consistent
Cleaning and replacement
Maintenance and cleaning
Use cylinder head 180 degree
adjustment
Adjusting bolts on the oil cylinder
Add adjusting gasket on lifting
cylinder piston rod
Come on
Unpick and wash
Cleaning and repairing
Repair welding, bottom leakage
Pry tight
Check oil cleanliness, grade 9-11
required
Replace seal ring
Replacement and adjustment
Adjust the
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