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PRE-OPERATION INSPECTION:
Each time the jack is to be used, inspect the following:
1. Check the tripod structure for rigidity. Make sure all bolts are tightened.
2. Check hydraulic line connections for leaks. Tighten as required.
3. Check for hydraulic fluid leaks around the base, reservoir, tripod head, hand pump, air pump (if so
equipped), hydraulic casters (if so equipped) and shock absorber (if so equipped).
4. Check hand pumps for proper operation.
5. Check swivel casters for proper operation.
6. Check jack reservoir fluid level with plunger fully retracted.
7. Check hydraulic caster reservoir fluid levels with caster plungers fully retracted (if so equipped).
8. Check nitrogen charge in shock absorbers (if so equipped).
OPERATION:
CAUTION: PRIOR TO TOWING, ENGAGE THE TWO TRAILING SWIVEL CASTER
LOCKS. ON JACKS EQUIPPED WITH ADJUSTABLE SWIVEL FOOT,
ALWAYS FULLY RETRACT THE FOOTPADS BEFORE MOVING OR
TOWING THE JACK. ON JACKS WITH HYDRAULIC CASTERS, FULLY
EXTEND CASTERS BEFORE MOVING OR TOWING JACK.
1. Position the jack under the jacking pad of the aircraft. For maximum maneuverability, verify all swivel
caster locks are disengaged.
2. Raise the extension screw by turning counterclockwise until the ship adapter contacts the jacking pad
or as far as the screw will travel (24 inches maximum).
3. Verify the jack is leveled (shim footpads if necessary). The jack plunger should be plumb during
lifting. On jacks equipped with adjustable swivel foot, check level using the bubble level mounted on
the jack. Adjust the footpads to contact the ground and plumb the jack. The footpads are adjusted by
standing on the footpad and adjusting the footpad locknut as required to extend the footpad. One end
of the pump handle fits the footpad locknut for final adjusting. On jacks equipped with hydraulic
casters, operate hydraulic caster hand pumps to extend casters to plumb the jack and then adjust the
footpads to contact the ground.
CAUTION: OPEN HYDRAULIC CASTER RELEASE VALVES TO ENSURE THE
WEIGHT IS TAKEN THROUGH THE FOOTPADS
CAUTION: ON JACKS EQUIPPED WITH AIR PUMP, AIR RELIEF VALVE MUST
BE INSTALLED AT ALL TIMES. IF AIR RELIEF VALVE IS REMOVED,
IT IS POSSIBLE TO OVER PRESSURIZE THE PNEUMATIC SYSTEM
WHICH COULD CAUSE EQUIPMENT FAILURE AND POSSIBLE
BODILY INJURY.
4. On jacks equipped with air pump, connect air supply (90-110 psig) to the 1/2 NPT air inlet at the air
valve (a minimum of 56 scfm is required). Air relief valve must be properly installed. Do not attempt to
remove air relief valve.
CAUTION: LOCKNUT MUST BE INSTALLED AND OPERABLE ON JACK AT ALL
TIMES. ALWAYS MAINTAIN LESS THAN 2 INCHES BETWEEN THE
LOCKNUT AND THE TRIPOD HEAD IN ALL PHASES OF LOAD
RAISING AND LOWERING.
5. On jacks equipped with electric motor operated hydraulic pump, connect power supply (230/460V,
60 hertz) to the switch box. Note: Factory wired for 460V. Internal wiring changes required for
230V.
Property of American Airlines
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