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repair (cont) - TM-5-4210-220-34_407
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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repair (cont) - TM-5-4210-220-34_409
TM 5-4210-220-34 3-8. ENGINE Continued 3-8.3 Blower Continued (57)   Place  the  oil  seal  ring  collar  installer  J6270-3  on  top  of  the  seal  ring  collar  (35)  and  under  the  ram  of  the press. Then, press the collar into the end plate (3) until the shoulder on the installer contacts the end plate. NOTE A step under the shoulder of the installer will position the collar approximately 0.005 in. (0.127 mm) below the finished face of the end plate. This is within the 0.002 to 0.008 in. (0.051 to 0.203 mm) specified. (58)   Install the remaining oil seal ring collars (35) in both front and rear end plates in the same manner. The lobes on the driving blower rotor and the teeth on its gear form a right-hand helix while the lobes and teeth of the driven rotor and gear form a left-hand helix. Hence, a rotor with right-hand helix lobes must be used with a gear having right-hand helix teeth and vica versa. NOTE To install the blower rotors into the blower front end plate, carry out steps 59 thru 66 following. (59)   Check the dowel pins (13) project 0.320 in. (8.13 mm) from the flat inner face of the front end plate to ensure proper alinement of the end plate with the housing. (60)   If removed, press a new bolt guide sleeve (bushing) into one bolt hole  in  the  bottom  side  of  the  end  plate. Install  the  sleeve,  with  the  three  notches  on  the  sleeve  to  the  bottom  side  of  the  end  plate  and  the  center notch to the outside of the end plate, flush to 0.005 in. (0.13 mm) below the surface of the end plate. NOTE When   installed,   the   inside   flats   of   the sleeve  will  be  parallel  to  the  center  line of the housing. (61)   Support the front end plate (3) on two wood blocks  approximately  4  in.  (100  mm)  high, with   the   inner   face   of   the   end   plate   (3) facing  up  and  the  TOP  side  of  the  plate facing to the right. (62)   Lubricate  the  oil  seal  ring  in  the  carrier  on the  front  end  of  the  right-hand  helix  rotor shaft with engine oil (item 17, Appendix B). (63)   Hold   the   right-hand   helix   rotor   (19)   in   a vertical  position  (gear  end  up)  and  position the   seal   ring   in   the   carrier   so   the   ring protrudes from its groove the same amount on each side and the gap is facing away. 3-118

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