AC 25-2AP User Manual - Page 3

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25-2AP

WARNING -

safe usage instructions

1. Study, understand and follow all instructions before

operating this jack.

2. Make sure the working area is clear before using the

jack

3. Do not exceed rated capacity.

4. Lift only on jacking points as specified in aircraft ma-

nual.

5. Use only on hard level surface.

6. Only original accessories and spare parts shall be

used.

7. No alterations shall be made to this jack.

8. The jack is provided with a pressure reducer unit,

reducing the air pressure in the jack to 8 bar/115 psi.

Maximum air pressure directly into the jack (bypassing

the reducer) is 10 bar/145 psi.

9. Failure to follow these warnings may result in personal

injury and/or property damage.

Assembly

Please notice that it is necessary to use a little oil for

lubrication during factory assembly. During transport this

oil may drip to the bottom of the box. This is absolutely no

sign of defect.

It is most convenient to mount the handle with the jack

turned upside-down.

IMPORTANT: The hoses must be twisted around the

bearing tube of the handle as shown in the picture: Ø6

connection to Ø6 quick fitting and Ø8 to Ø8 (Fig. 1). Do

not operate the jack in this position or lying on the side - if

doing so there will be serious oil spillage.

Air supply from aircraft tyre: Connect to pressure reducer

through hose with ¼" NPT or ¼" WRG. Maximum air pres-

sure directly into the jack (bypassing the reducer) is 10

bar/145 psi.

Air supply from compressed-air bottle: connect to nipple on

right side of pressure reducer.

Please notice that lifting speed will be reduced.

Full capacity requires 9 bar/130 psi.

Use

Lifting: Push the top button.

Lowering: Push the lower button. Always lower the cylin-

der completely after use in order to protect the cylinder.

Emergency lowering: Should the air-supply or jack fail,

the aircraft can be lowered by means of an emergency

lowering valve. Pull the 4 mm unbraco key loose from the

strip, remove the cover button (19) and slowly turn the

adjusting screw beneath (26) counter clockwise. The oil will

then bypass the normal air-controlled lowering valve.

The handle offers 4 different positions by pulling the re-

lease grip and tipping.

Noise emision: The A-weighted sound pressure level is

max. 80 dB(A).

Maintenance

Maintenance and repair must always be carried out by

qualified personnel.

Daily: Like other pneumatic tools the air motor requires oil

for lubricating. Lubricate the air-motor by injecting a little

thin oil into the hose and then lift to max. position. Discon-

nect the air supply, inject further oil into the air hose, recon-

nect the air supply and push the lower button to lubricate

the cylinder walls.

Monthly: Lubricate all mechanical parts with a few drops

of oil and inspect jack for damages.

Oil refill: Correct oil level is up to lower edge of filling hole

(7) with the jack horizontal and the cylinder fully down.

Quantity of oil:

Use any good hydraulic oil of viscosity ISO VG 15.

Never use brake fluid!

Safety Inspection

According to national legislation - minimum once a year

though - the jack must be inspected by a professional:

damages, wear and tear, adjustment of the safety valve,

hydraulic unit for leakages.

Connection of pressure gauge: A pressure gauge can be

connected through hole for adjusting screw (26). Remove

the cover button (19) and unscrew the adjusting screw (4

mm unbraco), remove the small pipe (27) and ball (14)

from the hole using a magneto. Then connect the pressure

gauge by means of the gauge connection (option). Hydrau-

lic pressure at full capacity: 320 bar/4640 psi.

Possible faults and how to overcome them

1. The jack does not lift to maximum position even though

the air motor is running: refill with oil.

2. The air motor runs slowly or stops: check air supply

(minimum 9 bar/130 psi); the air filter (handle drawing

no. 23) is dirty and needs cleaning or changing.

3. The load is dropping: change valve cores in pump (re-

pair kit 0907000).

IMPORTANT: the valve cores are to be tightened

slightly only, tighten to a torque setting of 10 Nm.

4. The cylinder is leaking: Change cylinder seals (repair kit

0903300).

Spare parts

Replace worn or broken parts with genuine jack manufac-

turer supplied parts only.

Destruction

Oil must be drained off and legally disposed of.

(Translation of original text)

2,5 l.