Piper PA-34-200T Seneca II, Руководство по обслуживанию

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PIPER SENECA II SERVICE MANUAL
01/01/09 II - HANDLING AND SERVICING
1B15
CAUTION: DIRT AND FOREIGN PARTICLES FORM AROUND THE FILLER PLUGS OF THE
LANDING GEAR STRUTS, THEREFORE, BEFORE ATTEMPTING TO REMOVE
THESE PLUGS, THE AREA AROUND THE FILLER PLUGS SHOULD BE CLEANED
WITH COMPRESSED AIR AND/OR WITH A QUICK DRYING SOLVENT.
2-35. FILLING NOSE GEAR OLEO STRUT.
To fill the nose gear oleo strut with hydraulic fluid (MIL-H-5606), whether it be only the addition of a
small amount or if the unit has been completely emptied and will require a large amount, it should be
filled as follows:
a. Raise the airplane on jacks. (Refer to Paragraph 2-12.)
b. Place a pan under the gear to catch spillage.
c. Relieve air pressure from the strut housing chamber by removing the cap from the air valve and
depressing the valve core.
d. There are two methods by which the strut chamber may be filled and these are as follows:
Method I: Addition of small amounts of fluid.
1. Remove the valve core from the filler plug at the top of the nose gear strut housing. Allow the
filler plug to remain installed.
2. With the piston tube extended, fill the strut with approved type fluid.
3. Attach one end of a clean plastic hose to the valve stem of the filler plug and submerge the
other end of the hose in a container of clean hydraulic fluid; make sure the end of the hose is
below the surface of the fluid.
NOTE: An air tight connection is necessary between the plastic tube and the valve stem.
Without such a connection, a small amount of air will be sucked into the oleo strut
during each sequence, resulting in an inordinate amount of air bubbles and prolonged
filling operations.
4. Fully compress and extend the piston tube, thus expelling any air trapped within the strut
chamber. By watching the fluid pass through the plastic hose, it can be determined when the
strut is full and no air is present in the chamber.
5. When air bubbles cease to flow through the hose, compress the piston fully and remove the
hose from the valve stem. Remove the filler plug to determine that fluid level is visible up to
the bottom of the filler plug hole.
6. Reinstall the core in the filler plug and the plug in the strut housing and torque from 350 to 400
inch-pounds.
Method II: Filling completely empty struts.
1. Proceed with steps A through C.
2. Remove the filler plug at the top inboard side of the gear housing.
3. With the landing gear assembly in a vertical position and with the piston fully compressed, add
hydraulic fluid through the air valve hole until the fluid level reaches the top of the valve hole
(or lower side if side-mounted) with no entrapped air in the assembly below the hole.
4. Install the air valve and tighten to a torque of 350 to 400 inch pounds.
NOTE: Gear assemblies with the air valve hole on the side of the cylinder may be serviced in
the horizontal position with the air valve hole vertical.