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Model: 2295-10PR (9694-010)
95 Ton (86 Metric Ton) Alligator Axle Jack
01/2019 | Rev. 01
Page | 3
5.0
OPERATION
5.1
PRE-OPERATION PROCEDURE
1. The accumulator is shipped uncharged and must be charged before use. (See Section 7.1.1 Verify or Recharge Nitrogen
Pressure in Accumulator for charging instructions).
WARNING!
DO NOT ATTEMPT to dis-assemble the accumulator.
2. Perform visual inspection, by checking for oil leakage.
3. Check for loose, damaged or missing parts.
4. Check oil level.
5.2
LIFTING PROCEDURE
1. Verify jack is located per aircraft jacking procedures.
2. Lift rain hat and raise screw extension to mate with aircraft axle jacking point.
3. Close release valve.
4. Operate pump to raise aircraft as required.
CAUTION!
With no load applied to the jack, it is normal for either stage to extend first. Once a load is applied to the
jack, ensure that the first stage ram (largest) is fully extended before the second stage ram (smallest)
begins to extend. If the jack does not extend in this sequence, the jack should be disassembled to
determine the cause of the excessive friction in the ram stages.
5.3
LOWERING PROCEDURE
1. Slowly open release valve to lower rams.
NOTE: Speed of lowering is controlled by how far release valve is open. Opening release valve too quickly will cause
the restrictor valve to actuate, resulting in the cylinder rams lowering very slowly. To reset the restrictor valve, close
the release valve and operate the hand pump 1-2 strokes. Open the release valve to continue lowering the rams
2. When
the load is removed from the cylinder rams, the accumulator will “power retract” rams to their fully collapsed
position.
3. When rams are fully collapsed, slide jack out from under aircraft.
4. Lower screw extension fully and replace rain hat.
5.4
RELIEF VALVE SETTING
1. Position jack under a jack tester. Fully extend the first ram and partially extended the second stage ram.
2. Remove lock wire and loosen nut on system relief valve.
3. Operate and verify that system relief valve is set at 95 tons maximum. Increase pressure setting by using an Allen wrench
to adjust screw clockwise. To decrease pressure setting, adjust screw counter-clockwise.
CAUTION!
Use care not to set valve more than 10% above rated capacity.
DO NOT exceed 95 tons (86 metric tons).
4. Tighten nut and apply lock wire.
Summary of Contents for Columbus Jack 2295-10PR
Page 2: ...REVISION DATE TEXT AFFECTED 01 01 2019 Original release ...
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Page 27: ...APPENDIX I Routine Jack Maintenance Bulletins ...
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