Labrie ALLEY -GATOR RIGHT-HAND, Maintenance Manual

Page: 82 / 108

72 Maintenance
the signal to the hydraulic pump to supply hydraulic fluid to the hydraulic system. The packer
directional control valve also houses a relief valve that is located in the subplate manifold. This relief
valve limits the pressure of the packer system.
Arm and Body Directional Control Valve
The arm and body directional control valve is mounted to the chassis frame in front of the hopper
bowl. The directional control valve is solenoid operated and consists of working sections each
individually devoted to a single hydraulic function. Identification of each section is made as such,
from left to right: arm in/out, arm up/down, grabber open/close, hopper cover open/close
(optional) or crusher panel up/down (optional), tailgate up/down and body hoist up/down.
N
OTE
:
Starting from the left, the 4th section of the arm and body directional control valve is an
optional working section.
The directional control valve has a main relief valve that has been set to 2800 psi; this setting should
not be adjusted. The individual working section relief valves should not require adjustment.
However, should adjustment become necessary, pressure adjustment guidelines are outlined on
page 84.