Hydraulic System 143
8. Remove the pressure gauge from the inlet cover and install it on the maximum pilot pressure port
(see D on Figure 5-21).
9. Disconnect the packer extend proximity switch. Activate the packer extend until it reaches the
end of stroke.
10. Adjust pilot pressure to 550 psi (± 50 psi) using the adjustment screw located at the front of the
valve (see B on Figure 5-21).
11. Test the valve. The valve should shift sharply.
Figure 5-21
Valves and ports
Adjusting Pressure on the Proportional Valve
AUTOMIZER™ vehicles use an extra valve stack to control the arm, the chute, and the crusher panel (if
equipped). This valve is of the proportional type, meaning that the amount of flow coming out of it
will be according to the position of the spool.
Levers are delivered with the vehicle to make the pressure adjustment.
IMPORTANT: Before making any adjustments to the lifting arm proportional valve, the dump valve pressure (if
equipped) must have been properly set. For more information on adjusting dump valve pressure,
see Adjusting Pressure and Relief Valves on page 139.
A
C (behind)
F (main relief)
E
B
D
This section, known as the utility sec-
tion, is fixed to an electro-hydraulic
valve only
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