Labrie Pendpac WITTKE RETRO FL Maintenance Manual page 98

88 Maintenance
The throttle advance switch fitted to the outside control station will advance the engine RPM to 1500
when activated. The transmission must be in neutral, and the engine ECM programmed to act on the
input signal.
With the throttle advance switch in the "auto" position, the system will advance to 1500 RPM when
the PACK, RETURN or AUTOPACK functions are activated.
Figure 3-28 Outside controls (mounted behind cab)
Figure 3-29 Curbside controls
Valve Box and Air Valves
The valve box houses the solenoid-operated air valves that direct air to the air actuators on the
hydraulic valve bank. Power is required to energize the solenoid so air can pass to the work section
dedicated to that particular air valve.