Labrie Pendpac WITTKE RETRO FL Maintenance Manual page 99

Figure 3-30 Valve Box
Supply air from the chassis air tank passes through the filters then feeds the air valves in the valve box.
These normally closed air valves are grouped into banks capped with manifold ends with ports for
supply and exhaust air to be routed. When an air valve opens, air passes through a single air line from
the air valve and leads to one of two ports on an air actuator on the hydraulic valve bank or to the
joystick.
Your W R
ITTKE ETRO
Tailgate open
Tailgate close
Top door open
Top door close
Pack
Return
Arms up cutout
Tipper up
Tipper down
Hoist up
Hoist down
Throttle advance
Main joystick cutout
TM
F may not have all the air valves listed below.
L
Valve Box Air Valves
extends the tailgate cylinders
retracts the tailgate cylinders
retracts the top door cylinder
extends the top door cylinder
extends the pack cylinders
retracts the pack cylinders
cuts air used to retract the arm cylinders
cycles tipper actuator up
cycles tipper actuator down
extends hoist cylinders
retracts hoist cylinders
increases vehcile RPM's by retracting an air
cylinder which is linked to the throttle
disables joystick operation with the hydraulic
pump off
Maintenance 89