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3.
Locate the holding valve on the in/out cylinder (see Figure 10-18).
4.
Connect a pressure gauge to the automated arm valve.
Figure 10-17
Pressure gauge on quick coupler
5.
Start the engine and engage the hydraulic pump.
6.
Using a lever on the valve, manually extend the Right Hand™ arm gradually.
7.
If the gauge does not indicate a pressure of about 650 psi when the automated arm starts
extending, adjust the in/out holding valve adjustment screw to set the pressure properly.
N
: Turn the screw counter-clockwise to increase pressure or clockwise to reduce pressure.
OTE
N
: This pressure value of 650 psi is a reference value; it could be more or less. It all depends on
OTE
how much pressure the in/out holding valve needs to resist to an arm slide pull force of at least
1600 lbs up to a maximum of 1900 lbs, at which time the valve must open.
Lifting Arm 237
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Troubleshooting
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