TM 9-2350-238-10
CRANE OPERATOR AND RIGGER CONTROLS–CONTINUED
Key
19
2
0
21
2
2
23
24
25
26
27
Control or Indicator
Traversing foot pedal
Hydraulic ram hand pump
handle
Quick disconnect
coupling with cap
Tow winch brake pres-
sure selector valve
Boom winch brake pres-
sure selector valve
Boom cylinder
Boom winch hydraulic
motor
Boom cylinder bypass
valve
Intercommunication
control box
Function
Operates a three-position hydraulic valve to control traversing
crane cab by releasing traversing brake and traversing cab
clockwise or counterclockwise. It is spring-loaded to return to
center position.
Operates a double acting hydraulic ram pump to release tow
winch, boom winch, and traversing unit brakes and to raise
spade when vehicle hydraulic system pressure is not
available.
Provides a connection for accessory hydraulic hose that is
connected to impact wrench selector valve to allow raising
spade with hydraulic ram hand pump.
A two-position valve. When valve knob is pushed in (normal
position), system hydraulic pressure will release tow winch
brake. When valve knob is pulled out (emergency position),
hydraulic ram hand pump hydraulic pressure will release tow
winch brake.
A two-position valve. When valve knob is pushed in (normal
position), system hydraulic pressure will release boom winch
brake. When valve knob is pulled out (emergency position),
hydraulic ram hand pump hydraulic pressure will release boom
winch brake.
Two hydraulic cylinders that raise and lower boom.
Plays out or retrieves cable.
A two-position valve. When handle is pointed to left (normal
position), valve is closed. When handle is pointed forward,
valve is open and hydraulic pressure in boom cylinders is
released to lower boom. Valve must be opened slowly to pre-
vent damage to equipment.
Provides interphone and radio control facilities for crew.
2-11
