Hale Q Series Muscle - Manual (Page 43)

43 MUSCLE (Midship) Pumps Installation, Operation, and Maintenance Manual
p/n: 029-0020-63-0
Accessories / Options 
Figure 3-8: Automatic Pump Shift Overview
It uses available apparatus air pressure for power and is activated by an in-cab pump
shift control valve. (See Figure 3-9: “Pump Shift Control Valve.”) The system includes
a three-position pump shift control valve assembly and indicator lights (GREEN),
mounted in the operator’s cab and on the operator’s panel.
Figure 3-9: Pump Shift Control Valve