Lifting Arms 225
Figure 10-20
Holding valve adjustment screw (up/down cylinder) - HD arm
IMPORTANT: Cushioning cartridges on up/down cylinder (see Figure 10-20) should be torqued to 28 ft-lb.
Adjusting the Arm Vane Pump Relief Valve
Usually, there is no arm vane pump relief valve on an AUTOMIZER™. However, if your AUTOMIZER™
vehicle is equipped with such a valve, it would be located on the front of the pump.
Tighten the relief valve completely on the pump.
The arm (retract/extend) and gripper (up/down movement) operating pressure is the same as the
main relief
1
. Table 1 lists the operating pressure and cycle times for each arm function. No
adjustments are required for these functions. Only “gripper close” requires proper adjustment to
prevent crushing roller carts. See Adjusting Arm Speed on page 226 to adjust the gripper load sense
relief valve.
For more information, see Adjusting Pressure on the Proportional Valve on page 143.
1. If the arm is equipped with a 300-gallon/1100-L gripper, the up/down and extend/retract movements are set to 2700 psi.
Table 1 Arm operating pressure and cycle times
Arm function Pressure setting (psi) Cycle time (sec.)
Extension/retraction 2000 (96 gallons, std & HD)
2700 (300 gallons/1100 L)
3.25/3 (all models)
Gripper up 2000 (96 gallons, standard)
2000 (96 gallons, HD)
2700 (300 gallons/1100 L)
3 (96 gallons, std & HD)
3.6 (300 gallons, std & HD)
Opening cushioning
adjustment screw
Closing cushioning
adjustment screw
Holding valve
adjustment screw
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