2. Dismantle end cap at both sides with
innerhexagon screw, check if sealing ring is
good. Pull out valve rod from long end cap;
check if the valve rod and valve surface is
impacted; install valve rod to valve when it is
moving smoothly and there is no blockage, put O
ring in oil seal groove of end cap, keep end cap
connection oil mouth upward when installing end
cap, fastening torque of end cap bolts is 35
40N.m.
3. If valve rod end spring needs to be replaced, fix
valve rod with special fixture, screw out end cap
bolts with wrench. Check if the spring is broken
or deformed, when installing spring and valve
rod, the clearance between return spring and
spring seat when spring is at free state is around
2.5mm.
4. Dismantle and assemble check valve. Dismantle
three end caps of check valve with inner
hexagon screw, mark on each end cap with
chalk, check if the check valve is leaking by
checking if the spring is deformed and surface
normal line of check valve is good. Guarantee
check valve and valve seat can move flexibly
during installation; while check if 1.0 hole on
tope of the hydraulic control check valve is
blocked before installation. Check if all screw
plugs are complete, check if screw plug is screw
down and sealing ring is complete when oil is
leaking.
SPC000014 Main Control Valve
Page 6
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