Labrie ALLEY -GATOR RIGHT-HAND, Maintenance Manual

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Maintenance 89
Figure 3-62 Pressure test port
5.
START the engine and ENGAGE the hydraulic pump.
6.
Using a lever on the valve, manually RAISE the Right Hand™ arm gradually.
7.
If the gauge does not indicate a pressure of about 700 psi when the automated arm starts going
down, ADJUST the up/down holding valve adjustment screw to set the pressure properly.
N
OTE
:
Turn the screw counter-clockwise to increase pressure or clockwise to reduce pressure.
N
OTE
:
This pressure value of 700 psi is a reference value; it could be more or less. It all depends on
how much pressure the up/down holding valve needs to resist to a downward pulling force of
at least 1000
lbs.
Figure 3-63 Holding valve adjustment screw (up/down cylinder) - HD arm
I
MPORTANT
: Cushioning cartridges on up/down cylinder (see Figure 3-63) should be torqued to 28 ft-lb.
Up cushioning
adjustment screw
Down cushioning
adjustment screw
Holding valve
adjustment screw