To operate boom or spade under no-load condition:
Operate BOOM or SPADE operating levers. See paragraph 2-11e for boom operation or
paragraph 2-11d for spade operation.
Valve position is for normal operations.
To operate hydraulic impact wrench of refuel-defuel system:
Check APU emergency winch control valve for NORMAL OPERATION position.
Move SYSTEM SELECTOR control lever (2) to REFUEL.
See paragraph 2-13e for refuel-defuel operation or paragraph 2-13f for hydraulic impact wrench
Controls. Spade is controlled by main or auxiliary hydraulic system. Controls are located in driver's area.
Prepare main hydraulic system for operation (see para. 2-11c).
Refer to paragraph 2-11c(2) for using auxiliary hydraulic system to stow spade.
Spade is used to stabilize vehicle when:
Hoisting over 6 tons (5.4 metric tons) without lockout blocks installed.
During all main winching operations.