AN 01-25CN-2

PARAGRAPH 4

(b) The retracting mechanism consists of a hydraulic retracting strut (Drawing No. 87-37-905) mounted on the fuselage frames 13 and 14. (See Figs. 63 and 64.) The piston rod extends forward from the cylinder and carries a lug to which the upper end of the oleo strut is attached by a bolt. A long piston rod guide rod extends forward of Station 11 and is supported by braces from Stations 11 and 12. During retraction the piston and rod are forced forward, carrying the upper oleo support with it. The oleo strut (Drawing No. 87-37-510) is attached by a 3/8-inch diameter bolt directly to the lug on the retracting strut piston.  (2) INSTALLATION AND DISASSEMBLY~ To Remove the Tail Wheel Assembly.    (a) Disconnect the tail wheel door turnbuckles at the doors.    (b) Remove the screws around the edges of the boot.    (c) Disconnect the tail wheel steering cables.    (d) Disconnect the oleo strut at the lower end.    (e) Disconnect the drag link from the fuselage by removing the two hinge bolts at the forward end.    (f) Remove the tail wheel and drag link through the tail wheel door opening.    (g) Remove the bolt at the upper end of the oleo strut and remove the strut through the door opening.    (h) Disconnect the hydraulic lines to the retracting strut, and disconnect the position indicator link.    (i) Remove the two bolts at the front and the two bolts at the center of the strut with the piston held in the full aft position, and lower the rear end of the strut, at the same time moving it aft until the piston rod is free from the guide.  (3) TO REMOVE THE OLEO STRUT FROM THE FUSELAiSE.    (a) To remove the oleo strut only from the fuselage, first unbutton the access door below the horizontal stabilizer and the inspection hole above and forward of the access door. Place a jack under the rear jack point to support the aft end of the airplane.

(b) Be sure the tail wheel is down. Work through the access door and remove the bolt attaching the lower end of the strut to the tail wheel drag link.    (c) Working through the hand hole, remove the bolt attaching the oleo piston to the lug on the retracting strut.    (d) Remove the oleo strut through the access door.  (4) TO DISASSEMBLE THE OLEO STRUT. (See Fig. 65.)    (a) Vent the air pressure and remove the Shrader plug to drain the fluid.    (b) Place the oleo strut in a wooden block clamp and insert the clamp in a vise to keep the oleo cylinder from turning.    (c) Force a screwdriver or similar tool under the retaining ring on the cylinder and disengage the end of the ring from the hole in the cylinder. Expand the retainer ring and slide it off the cylinder.    (d) Engage a spanner wrench on the gland nut and turn the nut out of the cylinder.    (e) Pull the piston assembly from the cylinder and slide the washers and packing off the piston.    (f) Remove the metering pin, if desired, by using the metering pin wrench (Drawing No. 87-88031) carried in the tool kit. When the metering pin is removed, discard the copper gasket so that it will not be reinstalled. Never install a used gasket on a metering pin.    (g) Place the piston in a wooden block clamp and tighten the clamp in a vise.    (h) Remove the lock pin from the piston and piston bearing and unscrew the bearing from the piston.  (5) TO ASSEMBLE THE OLEO STRUT.    (a) Before assembling the oleo strut, be sure that all parts are thoroughly clean and free of chips. Clean with alcohol and blow out with compressed air if available. Inspect all packings and washers before installing them in the cylinder.

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