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STATOR TEST
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TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
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VOLTAGE REGULATOR REPLACEMENT
TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 ELECTRICAL There  is  no  stop  on  the  shaft  to  prevent  the  slip  rings from being pressed on too far.  It is therefore necessary to  press  the  slip  rings  only  to  a  point  where  there  is  9.5 mm  (3/8") space between the inner edge of the slip rings and the rotor (see Fig.  25). REASSEMBLY 1.    If  slip  ring  end  bearing  has  been  removed,  press  a  new bearing in place from the outside of the housing.  Bearing should  be  installed  with  seal  facing  in  toward  slip  rings. When  properly  installed,  the  manufacturer's  part  number stamped  on  the  end  of  the  bearing  will  be  facing  toward the outside of the housing. Bearing should seat against lip on inside end of bearing bore. After  bearing  is  installed,  apply  a  small  amount  of  grease (Chevron SRI 2 or equivalent) to rollers. 2.  Reinstall heat sinks in slip ring end housing.  Be sure that upper   and   lower   insulating   washers   are   in   their   proper location.  Install but do not tighten lower heat sink retaining screws, lockwashers, guardwashers and insulating washers (see Fig.  9). Replacement heat sinks may differ in thickness or appearance from    the    original    assemblies,    but    will    fit    and    function interchangeably. 3.    Install  terminal  bolts  and  regulator  lead  wires.    Red  wire goes   on   positive   heat   sink   and   black   wire   goes   on negative.    Be  sure  that  mating  surfaces  of  heat  sinks, terminals and terminal bolts are clean and free of paint to insure a good electrical connection (see Fig.  7). 4.     Install two insulating bushings on each terminal bolt and install regulator housing. 5.     Be  sure  that  red  and  black  regulator  leads  are  properly routed   through   cutaway   section   of   end   housing,   and install and tighten nuts on terminal bolts (see Fig.  4). 5.    Tighten  lower  heat  sink  screws  and  check  all  leads  for proper  routing,  being  sure  that  no  lead  is  pinched  under heat sink. 6.  Reinstall capacitor. 7.  Reinstall stator and terminal nuts.  It is advisable to align stator  and  housing  by  temporarily  installing  the  through bolts. 8.  Press drive end bearing into housing and reinstall bearing retainer and four screws. When    installing    bearing,    press    on    outer    race    to    avoid transmitting   force   through   the   bearing   balls   which   could brinnell the bearing. 9.    Press  drive  end  housing  and  bearing  onto  rotor  shaft. Using a sleeve around the shaft, press on the inner race to avoid brinnelling the bearing. 10.    Install  rotor  and  housing  assembly  into  stator  and  slip ring  end  housing  assembly,  being  sure  that  mounting ears are aligned. 11.  Install three through bolts and self locking nuts.  Torque to 5.6-6.8 N.m (50-60 in. lbs.).  Place a small amount of grease  (Chevron  SRI  2  or  equivalent)  in  housing  and reinstall  the  metal  dust  cap  by  carefully  pressing  it  into place. 12.  Install diode trio and three nuts. 13.  Insert outer brush and spring assembly into the housing and     compress     the     brush     spring,     using     a     small screwdriver  or  similar  tool.    While  holding  the  spring compressed, insert PRINTED IN UNITED STATES OF AMERICA Fig.  25 CTS-2743T  Page 11

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