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pads have adjustable leveling feet for slightly uneven or sloping floors. On jacks equipped with hydraulic
casters, leveling of the jack is faster and easier by selectively extending or retracting the caster plungers
utilizing the caster hand pump or release valve. Extending the casters also increases the towing ground
clearance. For extended towing over rough surfaces, a hydro-pneumatic shock absorber is provided to
cushion against towing loads and improve caster life.
PREPARATION FOR USE:
Disregard the following erection procedure if the jack is shipped fully assembled. If the jack is shipped
partially assembled, erection is accomplished by following the suggested sequence below (also see
figures 1A & 1B):
1. Install sling under tripod head of cylinder assembly and support from a crane or forklift capable of
lifting 6000 pounds to a height of 12 feet.
2. Install legs, tripod head pins and retaining rings.
3. Install braces.
4. Tighten all bolts.
If jack is equipped with adjustable swivel feet, perform the following procedure to calibrate bubble level:
1. Hang 2 plumb bobs (at 90°) from the tripod head with the plumb bob strings approximately parallel to
the cylinder assembly (dial indicator magnetic bases work well as supports for the plumb bobs).
2. Stand on jack footpads and screw the footpad locknuts up to the end of the legs, continue turning
footpad locknuts until weight of jack is off casters (one end of the pump handle fits into the footpad
locknuts to provide extra leverage if required). Adjust footpad locknuts so both plumb bob strings are
parallel to the cylinder assembly (carefully measure top and bottom from cylinder assembly to
strings). Alternately, if jack is equipped with hydraulic casters, operate hydraulic caster hand pumps
and/or release valves to extend or retract casters until both plumb bob strings are parallel to the
cylinder assembly.
3. Remove cover from bubble level and adjust screws to center bubble. Lock adjustment screws and
replace cover. Tag with date of calibration.
4. Raise footpads fully to stow position and reinsert pump handle in handle holder. Remove plumb bobs.
5. Bubble level should be checked periodically as directed by cognizant quality control department.
Before placing jack in operation, perform the following procedure:
1. Remove filler cap from the filler spout located at the side of the reservoir.
2. Fill jack reservoir to mark on dipstick with MIL-H-5606 hydraulic fluid or approved equivalent
(reservoir capacity is approximately 26 gallons/98.4 liters). Jack plunger must be fully retracted before
filling reservoir. Replace filler cap.
3. Open release valve and operate hand pump a few strokes to bleed all air trapped under hand pump.
4. Close release valve and operate hand pump to raise plunger approximately 1 inch.
5. Open release valve to retract plunger fully to bleed all air trapped under jack plunger. Close release
valve.
6. If jack is equipped with hydraulic casters, perform the following procedure:
a. Remove the elbow/breather located on top of the reservoir.
b. Open release valve and fully retract caster plunger.
c. Fill reservoir to the top with MIL-H-5606 hydraulic fluid or approved equivalent. Replace
elbow/breather.
d. Open release valve and operate hydraulic caster hand pump a few strokes to bleed all air trapped
under hand pump.
e. Close release valve and operate hand pump to extend caster approximately 1 inch.
f. Open release valve to retract caster fully to bleed all air trapped under plunger. Close release
valve.
g. Repeat for other hydraulic casters.
7. If jack is equipped with shock absorbers for the hydraulic casters, remove valve cap at end of unit and
charge with nitrogen gas to 275 psig (19.3 kg/sq cm) using accumulator test gauge assembly (P/N
872845).
8. If jack is equipped with electric motor operated hydraulic pump, note factory wired for 460V. Internal
wiring changes are required for 230V.
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