Labrie ALLEY -GATOR RIGHT-HAND, Maintenance Manual

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82 Maintenance
Tailgate Work Circuit
The tailgate work circuit (see Figure 3-55) consists of two double acting hydraulic cylinders, one
valve bank section with on/off solenoid, two pilot operated check valves and two secondary port
relief valves.
Body Hoist Work Circuit
The body hoist work circuit (see Figure 3-55) consists of one single acting cylinder, one valve bank
section with on/off solenoid, two velocity check valves and two secondary port relief valves.
However, only one relief valve is truly utilized
(body UP) . The other hydraulic function (body
DOWN) lowers on the principal of gravity and the physical weight of the body thus enabling the relief
port to be set at the very minimum.
Hopper Cover/Crusher Panel Work Circuit (optional)
Your Alley-Gator Right-Hand
TM
may be equipped with a hopper cover or a crusher panel. If so, the
4th working section starting from the left is devoted to the hydraulic functions of the hopper cover or
the crusher panel.
The hopper cover/crusher panel work circuit (see Figure 3-55) consists of one double acting
cylinder, one valve bank section with on/off solenoid, two flow restrictors and two secondary work
port valves.
Pressure Settings
Tailgate UP 2500 psi
Tailgate DOWN 2500 psi
Pressure Settings
Body hoist UP 2500 psi
Body hoist DOWN 500 psi
Pressure Settings
Hopper cover OPEN 1500 psi
Hopper cover CLOSE 1800 psi
Crusher panel DOWN 2500 psi
Crusher panel UP 2500 psi