2-11. OPERATING PROCEDURES-Continued.
Do not keep boom in full-raised position for extended period of time. Failure of
hydraulic system could occur, causing boom to free-fall, resulting in injury or
death to personnel.
To lower a boom that has been in full-raised position for extended period of time, repressurize
hydraulic system using following steps.
Start engine and engage hydraulic system.
Place BOOM operating lever in FORWARD position and hold for approximately 5 minutes (see
para. 2-11e). This allows system to fill with oil and eliminates any air pockets.
Move boom backward and forward several times within 4 ft (1.2 m) live boom area (see para.
2-11e(5)). This will assure that all air pockets have been eliminated and boom will operate
At no time during M88A1 MRV boom operations are personnel required to be
positioned on engine deck of vehicle. The "A" shape of boom support latch (see
para. 2-11e) is designed to guide hoist winch cable out of path of retracting boom.
Lower boom to stowed position.
Hoist Winch Operation.
All personnel must stand clear (at least double distance of cable) in case lines
Observer must be in view of both operators to direct operations.
Inspect rigging before operation.
Controls. Operator controls payout and reeling speeds for hoist winch cable by using HOIST WINCH
SHIFT lever. Speeds may also be controlled by using HOIST WINCH operating lever (see para. 2-1b).