TDR-Manual 2009 - Henseleit Helicopters

Chapter – IX T a i l G e a r ( Assembly Group 9 )(Bag 9-I)The bearings 0900b on the side are fixed with a little amount of Loctite from inside the housing 0900a. Parallel pliers or asimilar tool can be helpful.For dismounting the bearings, heat the housing. The bearings can be removed more easily without bending the sensitivehousing.The bearings for the tail input shaft 0904 are pushed into the housing by a mandrel, in order to prevent pressure from beingtransmitted to the inner rings of the bearing.The fixing screw 0904a has to be well-tightened and secured using Loctite, so that the bevel gear 0903 sticks to the knurledfront surface of the tail input shaft with the necessary contact pressure.Attention ! The gear box flange is covered with a transparent shrinking tube of a wall thickness of 0.1 mm allowing to avoida direct contact between the aluminium tube and the box. Later when pushing in the box make sure that the shrinking tubedoes not twist. Otherwise the puncture holes are not aligned to the box holes any more (you can also create new holes usinga hot copper-bit).During the dismounting of the gear the shrinking tube cover may get stuck in the tail boom. Simply remove it from the tailboom and pull it over the tail gear box flange. In case of need the flange can also be wrapped with one or two layers oftransparent adhesive tape, if there is not any suitable shrinking tube available.24