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Calibration
Aggregate Scale Calibration - TM-5-3895-374-10_122

TM-5-3895-374-10 Paving Machine Bituminous Material: Crawler Mounted Diesel Engine Driven Manual
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TM 5-3895-374-10 1.  Aggregate Scale Calibration Item Procedure 1 Check the initial feeder calibration prior to starting. 2 If it has  not  been  set  previously,  enter  the  feeder  rate  of  50  tons  per  hour  onto  the  monitor  for each feeder. 3 Set the control gates on the feeders to a five inch opening. 4 This  puts  the  feed  rate  for  calibration  purposes  at  an  approximate  value  suitable  for  calibrating the aggregate scale. 5 Weight  the  truck  to  be  used.    Follow  the  instructions  regarding  truck  weighing  that  appear  in appendix E. 6 Inspect the feed conveyor. 7 Verify that all pulleys and return rolls are clean and free from materiel build up. 8 Inspect the belt to see that it is clean and free from materiel build up. 9 Remove build up from on any of these components prior to beginning calibration. 10 Check the belt to see that it is trained and running centered on the pulleys and idlers. 11 If not, train belt prior to calibrating. 12 Inspect counter weight on gravity take-up.  Remove any materiel build up prior to calibration. 13 Feeder panel-select DIVERT on the Auto/Divert/Drum selector switch. 14 Motor control panel-select BYPASS on the Drum Interlock selector switch. 15 Feeder panel-press START on the Feed Conveyor button.  This belt should run for at least fifteen (15) minutes prior to calibrating. 16 Back  a  truck  up  to  the  bypass  chute  on  the  drum  mixer  (the  extension  to  the  chute  must  be installed if not already in place). 17 Place the deflector gate so that the aggregate falling into the chute is directed into the truck box. 18 (Be prepared to shovel the materiel from the back of the truck box to the front if necessary.) page 2-87







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