1. © Columbus JACK Corp. 2011 Axle Jack Model 2295-10PR Columbus JACK /Regent “The Strength of Experience”

2. © Columbus JACK Corp. 2011 2295-10PR Capacity 95 tons Hydraulic Stroke 11 inches Screw Extension 5 inches Closed Height 10 inches Extended Height 26 inches Operating Pressure –First Stage4335 psi –Second Stage6795 psi

3. © Columbus JACK Corp. 2011 2295-10PR Cylinder Support Caster Air Pump Accumulator Cylinder Assembly

4. © Columbus JACK Corp. 2011 2295-10PR Hand Pump Towbar Control Console

5. © Columbus JACK Corp. 2011 2295-10PR

6. © Columbus JACK Corp. 2011 2295-10PR Air Control Valve Release Valve Dual Reading Load Gauge (Optional)

7. © Columbus JACK Corp. 2011 2295-10PR Air Pressure Relief Valve Air Inlet System Relief Valve Shown Without Optional Load Gauge Release Valve

8. © Columbus JACK Corp. 2011 2295-10PR Accumulator Charge Port Test Port Accumulator Relief Valve

9. © Columbus JACK Corp. 2011 2295-10PR Cylinder Bushing O-Ring 1 st Stage Ram 2 nd Stage Ram O-Ring

10. © Columbus JACK Corp. 2011 Operation – To Raise Locate jack under aircraft lifting point. Raise towbar to lower cylinder to ground. Raise rain hat and unscrew screw extension as required. Close release valve. Operate pump until rams have raised aircraft to desired height.

11. © Columbus JACK Corp. 2011 Operation – To Lower Slowly open release valve. –Opening release valve too quickly will cause restrictor fuse to actuate, resulting in the rams lowering very slowly. –To reset the restrictor fuse, close release valve, operate hand pump 1-2 strokes. Open release valve slowly to lower rams. When load is removed from cylinder rams, accumulator will “power retract” rams to their fully collapsed position.

12. © Columbus JACK Corp. 2011 Operation – To Lower Lower screw extension completely. Place rain hat over cylinder.

13. © Columbus JACK Corp. 2011 To verify/recharge the nitrogen pressure in the accumulator: –Open release valve on console and insure rams are fully collapsed. Special Maintenance Instructions –Open accumulator isolation valve under frame. –Attach 0-300 psi test gauge to top of accumulator. –Verify accumulator charge is 225 + 5 psi. Re-charge as necessary with nitrogen. –Close accumulator isolation valve.

14. © Columbus JACK Corp. 2011 To recharge hydraulic fluid pressure in the accumulator: –Open release valve on console. –Attach 0-600 psi test gauge to test port at bottom of accumulator. –Close release valve on console. –Fully extend both cylinder rams. –Open accumulator isolation valve under frame. –Loosen hose fitting at top of cylinder assembly. Special Maintenance Instructions

15. © Columbus JACK Corp. 2011 Special Maintenance Instructions –Using hand pump, slowly pump hydraulic fluid until all entrapped air is removed. –Tighten hose fitting at top of cylinder assembly. –Loosen gauge fitting at test port at bottom of accumulator. –Using hand pump, slowly pump hydraulic fluid until all entrapped air is removed. –Tighten gauge fitting at test port. –Using hand pump, pressurize system to 425 psi maximum. –Close accumulator isolation valve under frame.

16. © Columbus JACK Corp. 2011 Special Maintenance Instructions –As there may be some residual pressure in the system, slowly remove gauge from test port on bottom of accumulator and install cap. –Cycle rams several times to verify smooth extension and retraction. –Open release valve on console and verify rams retract fully.

17. © Columbus JACK Corp. 2011 Questions ?