I
Procedures
1
Note
--
-
the
Main
relief valve
If the pressure is lower than the
specified value, adjust it according to
the following procedure.
(Same procedures as
MR1, MR2)
1. Remove the cap nut.
2.
Start the engine and he engine
throttle lever to high idle.
3.
Move the lever for measuring main
relief valve, fully pull to hold it, and
adjust the pressure by turning the
adjusting screw with a hexagon bar
spanner, while measuring the
pressure.
Adjusting screw turn to clockwise to
raise the pressure. (Adjusting screw
1 turn approx. 100
kgf/cm2 change
pressure)
4.
lnstall and tighten the cap nut.
5.
After locking, measure the pressure
again.
6.
Stop the engine. Remove the fill plug
on the hydraulic tank.
I
7.
Remove the pressure gauge. Apply
1
pipe sealant to the plug. Install the
plug. Install the fill plug on the
hydraulic tank.
Oil
fill
0
/
plug
I
I
Main relief valves
Do not remove the gauge port plug until
air pressure has been relieved in
hydraulic tank.
Control Valve Ass'y
Adjusting
Main valve screw
Cross section
of
Main relief valve
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