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LUBRICATION - TM-5-3895-374-24-2_172
TROUBLESHOOTING CHECKLIST - TM-5-3895-374-24-2_174

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 Table 2-Recommended Oil Grades. Ambient Viscosity Range Approx. Approx. Temperature F SSU at 100 F. SAE No. ISO No. (C) (38C) Above 90 (32) 1000-1200 50 320 32 to 90 (0 to 32) 700-1000 40 220 0 to 32 (-18 to 0) 500-700 30 150 Below 0 (-18) 300-500 20 100 To fill the gearbox, remove the breather plug and the oil  overflow  plug  (Fig.    3).    Fill  the  reservoir  up  to  the overflow hole.  Place the breather and the overflow plug back into their respective holes. Table 3-Oil Sump Capacities. Frame Capacity, Fl.  Oz.  (Liters) Size Vertical Horizontal 22 3.4 (.1) 6.1(.18) 24 3.4 (.1) 6.11(.18 32 8.5 (.25) 16.0 I(.47) 33 8.5 1(.25) 16.0 I(.47) 36 8.5 1(.25) 16.0 1(.47) 42 12.7 1(.37) 22.8 (.67) 45 12.7 1(.37) 1 22.8 1(.67) 47 12.7 1(.37) 22.8 (.67) 53 16.0 1(.47) 27.6 1(.82) 56 16.0 1(.47) 27.6 (.82) 59 16.0 1(.47) 27.6 1(.82) 65 28.3 1(.84) 52.1 (1.54) 68 28.3 1(.84) 52.1 11(.54) 615 28.3 (.84) i 52.1 )1(.54) 76 32.3 (.96) 59.5 11(.76) 711 l 32.3 (.96) 59.5 11(.76) 718 32.3 (.96) 59.5 11.76) Proper    lubrication    is    usually    the    most    important single  consideration  in  obtaining  maximum  service  life and the most satisfactory operation from the unit.  Unless operating conditions are quite severe, a weekly check of gearhouse  oil  level  and  necessary  addition  of  lubricant should  be  sufficient.    However,  oil  should  be  changed after    initial    100    hours    of    operation.        Thereafter,    a complete    oil    change    normally    is    made    after    1000 operating hours, or less, depending on the type of oil and oil operating temperature. Shaft  bearings  at  the  drive  end  of  the  blower  are grease lubricated and each bearing housing is equipped with pressure type grease fittings and pressure type relief fittings.  When servicing drive end bearings, use a NLGI #2   premium   grade,   petroleum   base   grease   with   high temperature  (300°   service   temperature)   and   moisture resistance   and   good   mechanical   stability.      Using   a pressure  gun,  force  new  lubricant  into  each  drive  end bearing  housing  until  traces  of  clean  grease  comes  out of the relief fitting. After  a  long  shutdown,  it  is  recommended  that  the grease relief fittings be removed, the old grease flushed out    with    kerosene    or    #10    lubricating    oil,    drained thoroughly,  and  bearings  refilled  with  new  grease.    Be sure grease relief fittings are reinstalled.  Grease should be  added  using  hand  operated  grease  gun  to  the  drive end bearings at varying time intervals depending on duty cycle and RPM.  Table 4 has been prepared as a general greasing  schedule  guide  based  on  average  operating conditions.    More  frequent  intervals  may  be  necessary depending   on   the   grease   operating   temperature   and under unusual circumstances. Table 4-Suggested Bearing Lubrication Intervals. Speed Operating Hours Per Day in 8 16 24 RPM Greasing Intervals in Weeks 750-1000 7 4 2 1000-1500 5 2 1 1500-2000 4 2 1 2000-2500 3 1 1 2500-3000 2 1 1 3000 and up 1 1 1 OPERATION Before  operating  a  blower  under  power  for  the  first time,  check  the  unit  and  the  installation  thoroughly  to reduce  the  likelihood  of  avoidable  troubles.    Use  the following  procedure  list  as  a  guide,  but  consider  any other special conditions in the installation. 1. Be certain that no bolts, tools, rags or dirt have been left in the blower air chamber. 2. Be  certain  that  inlet  piping  is  free  of  debris.    If  an outdoor  intake  without  filter  is  used,  be  sure  the opening  is  located  so  it  cannot  pick  up  dirt  and  is protected  by  a  strong  screen  or  grille.    Use  of  the temporary    protective    screen    at    the    blower    as described under INSTALLATION is strongly recommended. 3. Recheck     blower    leveling,    drive    alignment    and tightness  of  all  mounting  bolts  if  installation  is  not recent.    If  belt  drive  is  used,  adjust   belt   tension correctly. 4. Turn drive shaft by hand to make sure impellers still rotate without bumping or rubbing at any point. 5. Make sure oil level in blower gearbox is correct. 6. Check lubrication of driver.  If it is an electric motor, be  sure  that  power  is  available  and  that  electrical overload devices are installed and workable. 7. Open  the  manual  unloading  valve  in  the  discharge air line.  If a valve is in the inlet piping, be sure it is open. 8. Bump  blower  a  few  revolutions  with  driver  to  check that  direction  of  rotation  is  correct,  and  that  both units coast freely to a stop. After  the   preceding   points   are   cleared,   blower   is ready for trial operation under "no-load" conditions as set up under Item 7.  The following procedure is suggested to cover this initial operating test period. a. Start blower, let it accelerate to full speed, then shut off.  Listen for knocking sounds, both with power on and as speed slows down. b. Repeat  above,  but  let  blower  run  2  or  3  minutes. Check for noises, and vibrations of 5 mils or greater. c. Operate   blower   for   about   10   minutes   unloaded. Check   oil   levels.      Feel   cylinder   and   headplate surfaces for development of spots too  hot  to  touch, indicating impeller rubs.  Be aware of any noticeable increase in vibration. Assuming  that  all  trials  have  been  satisfactory,  or that necessary corrections have been made, the blower should now have a  final  check  run  of  at  least  one  hour under   normal   operating   conditions.      After   blower   is restarted page 3-807







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