Adjusting Up/Down Holding Valve Pressure - Labrie AUTOMIZER FULL EJECT Maintenance Manual

238 Lifting Arm
Figure 10-18 Holding valve adjustment screw (in/out cylinder)
N : If the cushioning effect on the retraction stroke needs to be adjusted, simply turn the
OTE
cushioning adjustment screw accordingly: clockwise to increase cushioning effect; counter-
clockwise to reduce it. The cushioning effect on the extension stroke cannot be adjusted.
N : Picture provided above is for illustration purposes only. It may differ from actual part.
OTE

Adjusting Up/Down Holding Valve Pressure

N : The up/down cylinder on a standard lifting arm has no holding valve. However, it has a flow
OTE
control cartridge that provides stroke-end cushioning during extension of the cylinder and a
retraction adjustment screw. The up/down cylinder on a HD lifting arm is fitted with a holding
valve as well as a flow control cartridge and a cushioning adjustment screw which are used to
adjust the stroke-end cushioning of the cylinder. The cartridge is used on extension, the
adjustment screw on retraction.
N : If the cushioning effect needs to be adjusted, simply turn the cushioning adjustment screw
OTE
accordingly: clockwise to increase cushioning effect, counter-clockwise to reduce it.
To adjust the up/down holding valve pressure (HD lifting arm only):
1.
Apply all safety measures to ensure safety around the vehicle at all times.
2.
Make sure that the parking brake is applied.
3.
Locate the holding valve on the up/down cylinder (see Figure 10-20).
4.
Connect a pressure gauge to the automated arm valve.
Cushioning
adjustment
screw
Holding valve
adjustment
screw