EKKO EK20R Manual page 57

1.The operating mechanism is not
flexible when stuck
2.Stem jammed with dirt
3.Return spring deformation or
Valve stem
fracture
cannot be
4.External force causes
reset
deformation of the stem
5.The mounting surface is uneven,
and the valve body is deformed,
causing the valve to be stuck.
1.Valve stem and valve hole wear,
gap increases, internal leakage is
serious
Stem drops 2.Stem or hole with scratches to
at neutral increase internal leakage
weight 3.The stem is not return to neutral
(excessive position
leakage in 4.Overload valve or overload valve
valve screw plug and valve body seal is
neutral not tightly sealed
position) 5.Severe leakage inside the
cylinder
6.Valve body groove size out of line
sealing oil length decreases
1.The oil is not clean, the split
spool or the split safety spool is
stuck by foreign matter
2.The opening and closing
Hard characteristics of the shunt safety
steering valve are not good or the pressure
regulation of the shunt safety valve
is low
3.Insufficient pump flow
4.Steering gear malfunction
1.There is a foreign matter stuck
No action between the main valve core of the
in the relief valve or the overload valve
cylinder and the valve seat.
(low 2.Damping hole blockage
pressure 3.Cone spool has abnormal wear
or no 4.Pressure regulating spring
pressure) deformation
5.Overflow valve adjustment screw
1Check the operating lever
2.Cleaning valve, fuel tank
and piping
3.Remove the back cover and
replace the spring
4.Replace stem or valve
assembly
5.adjust mounting plane
1.Reconfigure stem
2.Replace stem or valve
assembly
3.Check the reversing
mechanism
4Check if the O-ring is cut, if it
is damaged, replace it with a
new O-ring
5.Check the cylinder piston
seal for damage
6.Replace the valve
1.Cleaning the split spool or
split safety spool and tank
and piping
2 Replace the diverter relief
valve or re-adjust the diverter
relief valve pressure
3.Check why the oil pumping
system is insufficient
4.replace the steering gear
1.Cleaning valves, fuel tanks,
piping, etc.
2.Serious hydraulic oil
pollution, cleaning hydraulic
system
3.Check for wear and replace
the overflow valve assembly
4.Check spring quality
5.After adjusting the pressure
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