53280,12:53281,0?*********************************h**** ******** **** BY PAUL JORDAN ************ 1514 KOPSA COURT ************ CHEYENNE, WYOMING ******** **** 82007 ********5 #**** ********\ (*********************************~ 2DN$"" 3ST$"" 4CL$"" 5S1$"" 6V53248 <X832 894: Z:X,Z: AX896 958: Z:X,Z::2042,14B d" ɒ"i n"  BASIC AIR BRAKES ’" x" ˒": " THIS PROGRAM SHOULD GIVE YOU A BASIC ": " UNDERSTANDING OF WHAT STOPS AN " " 18-WHEELER."1 " I AM A COMPUTER, AND I WILL GO AS FAST"O VP2020:VP2,16:VP3,10p BO56289:Z16:BO(Z),11: " OR AS SLOW AS YOU WANT. JUST FOLLOW" " MY PROMPTS." " PRESS THE  F7 KEY WITH A SINGLE " " SOLID TAP WHEN YOU ARE READY TO GO ON.":600009 53281,0:53280,11:"";ST$k " TO HAVE AIR BRAKES WORK, WE MUST FIRST" " HAVE AIR UNDER PRESSURE. TO DO " " THIS WE NEED AN  AIR COMPRESSOR .": 60000:59200 " "  " "  " " "2 ""   "I ,"   "\ 6" "o @" " J"";ST$:" AN AIR COMPRESSOR IS NOTHING MORE THAN" T" A PISTON IN A CYLINDER WITH TWO " U" VALVES.": 60000:59200 ^"" g" *""h"  "7i" ****** "Lj" ****** "ak" ****** "xl"   "m"   "r60050:"";ST$;" AS THE PISTON OF THE COMPRESSOR MOVES"|" DOWN, OUTSIDE AIR PRESSURE PUSHES"$~" OPEN THE INTAKE VALVE AND AIR RUSHES"Q" IN TO FILL THE VOID." : 60000:59200]""" î"" *î*"" Õ *"" * ý "8" ****** *************"l"   *************""   "" "" "60050:"";ST$;" AS THE PISTON OF THE COMPRESSOR MOVES"-" UP, THE INTAKE VALVE CLOSES AND THE"]" EXHAUST VALVE IS PUSHED OPEN. THE HOT"" COMPRESSED AIR IS FORCED INTO THE"" RESERVOIR.": 60000: 60050 ""ST$" NOW WE HAVE AIR PRESSURE. BUT THERE IS"" A PROBLEM. HOW DO WE STOP THE ";&" COMPRESSOR BEFORE IT BLOWS SOMETHING"g0" UP. WE NEED A GOVERNOR TO CONTROL"1" THE AIR PRESSURE IN THE RESERVOIR.":60000:59200:""D" GOVî"N" î •"0X"  î •"_b"   •"l"  ý  ": 60050u""vST$" THE AIR GOVERNOR IS A SIMPLE VALVE"" THAT OPENS THE INTAKE VALVE OF THE"," COMPRESSOR AT A PRESET PRESSURE AND "R" LETS THE COMPRESSOR CYCLE. "" THIS MEANS THAT AIR IS DRAWN IN, AND"" PUSHED OUT THE OPEN INTAKE VALVE."" THERE IS NO AIR ADDED TO THE RESERVOIR":60000""" "B"    "y"  ȶ ȶ   ""    PISTON  AIR ""    ""    "E"  "k "  ""  ""  ":"" ST$" THE GOVERNOR HAS A PISTON HELD IN"*" PLACE BY A SPRING. AIR PRESSURE IN THE"J4" RESERVOIR PUSHES AGAINST THE PISTON"w>" UNTIL IT CAN COMPRESS THE SPRING AND"H" AND FORCE THE PISTON UP.": 60000:X1200:XR""\" "f"    "Bp"    "vz"     PISTON AIR ""     ""     ""   "9"   "c"   "" ADJUSTMENT SCREW  ":" TO UNLOADER":""ST$" THE PISTON IS FORCED PAST THE PORT"" THAT OPENS TO THE UNLOADER. THE "N" UNLOADER IS ANOTHER SMALL PISTON THAT"}" HOLDS THE COMPRESSOR INTAKE VALVE OPEN"" AND LETS THE COMPRESSOR CYCLE. THE"" GOVERNOR CAN BE SET BY A SCREW LOCATED"" UNDER THE TOP COVER. MAXIMUM PRESSURE":" SHOULD BE SET AT 120 POUNDS SQ. IN.": 60000E""p$" GOVî"." î •"8"  î •"B"  * •",L"  ý  "\`" ****** *************"j"   *************"t"   "~" "" "" 60050:"";ST$;" NOW WE HAVE THE COMPRESSOR UNDER "P" CONTROL AND 120 POUNDS OF PRESSURE "" IN THE AIR TANK. NOW ALL WE HAVE TO DO"" IS PUT THE AIR TO WORK.":60000" THIS IS A BRAKE CAN."""  "" ";" Զ "[" ȶ " "  "" Ƕ "" ȥԶ "(" " 2"  "x 60000:59200O" THERE ARE TWO CHAMBER HALVES HELD"u" TOGETHER BY A CIRCLE CLAMP.""""  ""  "" Զ " "  "C "  "f "  " " ȥ " "  " "  " 60000:59200!" A RUBBER DIAPHRAM OR PANCAKE."#!""E!"  "h!"" Զ "!,"  "!6"  "!@"  ""J" ȥ "%"T"  "8"^ 60000:59200n"h" A PLUNGER AND LIGHT RETURN SPRING.""r"""|"  """ œԶ """ œ "#"  "C#" œ "g#" œȥ "#"  "# 60000:X1500:X#"":X08:" ":X# 59200:59000%$" AS AIR PRESSURE ENTERS THE CHAMBER, IT"T$" PUSHES AGAINST THE DIAPHRAM FORCING "~$" THE PLUNGER OUT. WE NOW HAVE A "$" POWERFUL MECHANICAL FORCE THAT CAN BE"$" USED TO WORK THE BRAKE SHOES. THERE "$" ARE THREE TYPES OF BRAKES./%"  WEDGE ,  S-CAM , AND  DISK . "[%" ALL USE THE SAME BASIC BRAKE CAN "k%" SYSTEM."%""%"  "%" œ "%&" œ " &0" AIR"F&:" œ "k&D" œȥ "&N"  "&X 60000&l" NOW LET'S SEE HOW ALL THIS WORKS."&v""&"  FOOT VALVE "'" "4'" F "c'" "'" "'" ñ ձ "'" AIR "&(" "8(60000:59200i(" WE STEP ON THE BRAKE (FOOT VALVE) AND"(" LET THE COMPRESSED AIR FLOW TO THE "(" BRAKE CAN.":V21,4:V4,66:V5,135:V41,9(60000)"":X15:" ":X/)"":V5,138B)" "s)" Ւ ") " ")" "* " ñ ձ "2**" AIR "c* " "z* 59200:X1200:X* "";21);"BRAKE CANÛ"* 56011,9:1739,100:60060* 1739,111:60060* 1739,121:60060 + 1739,98:60060+ 1739,247:600603+ 1739,227:60060H+ 1739,160:60060n+ "";38);"כ"~+ X1800:X+ " THAT WAS JUST A LITTLE SLOW. IT TOOK"+ " TOO MUCH TIME FOR THE AIR TO REACH AND"," FILL THE BRAKE CHAMBER. WE NEED A "$," FASTER WAY!!":60000?,V21,0:""e," DASH VALVE ","  ,"  ÒóAIR 2,"  ò,-" Ø REL V-" "-" "-" ññ ձ "-" AIR "." ".59200:X1200:XR." HERE I HAVE ADDED A DASHBOARD MOUNTED"."" VALVE TO SUPPLY AIR TO A SECOND AIR".," TANK. YOU WILL ALSO SEE A RELAY VALVE.".6" THE RELAY VALVE TAKES A SMALL SIGNAL"/@" FROM THE FOOT VALVE AND SENDS THE SAME">/J" AMOUNT IF AIR PRESSURE FROM THE SECOND"a/T" AIR TANK TO THE BRAKE CAN."/hX1500:X:60000:X1500:X/059200:" FROM FOOTVALVE"/:" ý "/D" š "0N"  "D0X"  m0b"    "0l"  "0v"  TO BRAKES"0"     "1"   "E1"   ћ "}1"   FROM RESEVOIR"1"   "1"   "1"   2"   "E2" THIS IS THE INSIDE OF A RELAY VALVE."v2" YOU CAN SEE A PISTON, A SPOOL VALVE,"2" AND RETURN SPRINGS."260000:592002""S1$:X16:" ":X3"";S1$;" AIR FROM THE RESEVOIR FILLS THE"F3 " LOWER CHAMBER. WHEN A DRIVER STEPS "t3 " ON THE FOOT VALVE, AIR IS SENT TO THE"3" UPPER CHAMBER."3" Е  Ϸ"3 "     "04*"     FROM RESEVOIR"b44"     "4>"     ":60000:592004H" FROM FOOTVALVE"4R" ý " 5\"  "05f" "U5p" š"5z"    "5" К Ϸ "5"  ̯  TO BRAKES" 6"    "66"   ̯"b6"    "6"     FROM RESERVOIR"6"     "7"     "(7"   "Q7"   ":V5324872040,13:2041,13:V21,3:V39,2:V40,2:V27,37V0,125:V1,110:V2,155:V3,1107X1500:X:" AS AIR FILLS THE UPPER CHAMBER, IT"8" PUSHES DOWN AGAINST THE PISTON. THE"H8" PISTON FORCES THE SPOOL VALVE OFF ITS"y8" SEAT LETTING RESERVOIR AIR FLOW TO THE"8" BRAKE CAN.":600008 V21,08$" FROM FOOTVALVE--60 PSI"8." ý "98" ";9B" š"j9L" ВК ϒϷ"9V"    "9`"  ̷ "9j"  60  PSI  TO BRAKES":t"     "I:~" Е  Ϸ"{:"     ":"     120 FROM RESEVOIR":"     PSI ";"     "@;"   `;"  ":;" LETS SAY THAT THE FOOTVALVE IS SENDING";" 60 POUNDS PER SQUARE INCH (PSI) TO THE";" RELAY VALVE. AS PRESSURE IN THE MIDDLE"<" CHAMBER EQUALS THE FOOTVALVE PRESSURE"K<" THE PISTON MOVES UP, LETTING THE SPOOL"hX" Е Ϸ"<>b"    "z>l"    120 FROM RESEVOIR">v"    PSI ">"    "?"  "&?" ߒ"W?" WHEN THE FOOTVALVE IS RELEASED, SPRING"?" PRESSURE PUSHES THE PISTON ALL THE WAY"?" UP. THIS OPENS THE PORT IN THE TOP OF"?@" THE SPOOL VALVE, LETTING THE BRAKE CAN"@J" AIR DUMP TO THE OUTSIDE.":60000B@^"  t@h"  Òó AIR @r"  ò@|" Ø REL A" ".A" "[A" ññ ձ "A(#" AIR "A2#" "A<#" AS YOU CAN SEE THE RELAY VALVE CAN"BF#" SET THE BRAKES FASTER, AND RELEASE "Mv%X19:" ":XSM{%""M%"";ST$" IF YOU WOULD LIKE TO RUN THIS PROGRAM"M%" AGAIN TYPE  Y "M%" IF YOU WANT TO QUIT TYPE  N "M% Q$: Q$""9630M% Q$"Y"200N%Q$"N"9670N%9630N%"":dN N0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,24,0,0,60,0,0,126,0,0,255,0,1,255,128N!N3,255,192,0,60,0,0,60,0,0,60,0,0,60,0,0,60,0,0,60,0,0,255,0,1,255N"N128,1,255,128,1,255,128O#N0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,15,128,0,15,128,0,15,128,0,63,128XO$N3,255,192,31,255,192,63,241,192,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0oO%N0,0,0,0,0,0,0,0,0|OxX1 5O""O 34)"ג"O"  "P" œԶ "2P" œ "cP"  "P" œ "P" œȥ "P"  "PY1500:YP""!Q"  "RQ" œ "Q" œ "Q" AIR"Q" œ "R" œȥ "$R""  "9R,Y1700:Y:X:zR@"";DN$;" ":X1500:XRJR`"";DN$;" PRESS  F7 TO CONTINUE "Rj G$:G$(136) 60010Rt G$(136) 60030R~X1500:X:9S"";CL$:X08:" "BSX:TSX1400:X:S"":X08:" "SX: