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MICRO - BIRD

20

DEFROSTING

Windshield fogging and frosting is caused by warm, humid

air coming in contact with a cold windshield which causes the
moisture in the air to condense and possibly freeze if the wind-
shield is cold enough.  The warmer the windshield, the less
moisture will condense on it.  During initial warm up the defroster
blowers should be operated at maximum to heat the inside of the
windshield glass as much as possible.

If the defrosters are not turned on until the condensation

starts, it is more difficult to heat the glass and overcome condensa-
tion.  As passengers are loaded onto the bus, the moisture content
of the air inside the bus increases.  The most difficult conditions
will be encountered when there is a large passenger load which
must remain on the bus for extended periods of time, such as on a
charter or over the road activity trip.  Travelling at highway road
speeds causes accelerated heat dissipation through the windshield
glass, and each passenger continually adds to the moisture content
of the air within the bus.  After a period of time the moisture
concentration can become quite high.  This condition can be
improved by slightly opening the forward driver’s window, al-
lowing the moist air to escape into the low pressure area outside
the bus at that location and by operating all defroster blowers at
high speed.  If bus is equipped with adjustable static air vents in the
roof, they should be kept open, and exhaust fans, if so equipped,
should be used.

Auxiliary fans mounted on the dash or overhead may be

helpful in windshield defrosting when used to force warm air from
inside the body against the glass to warm it and evaporate mois-
ture.  They should not be directed to oppose the flow of air from the
defroster outlets but to assist that flow if possible.  Many different
variations of auxiliary fan directions have been found to be effec-
tive under different conditions and their use on your unit can
probably best be determined by trial.

Summary of Contents for Micro Bird

Page 1: ......

Page 2: ...er Seat Belt Operation 10 Seat Belt Inspection Maintenance 10 Seat Cushion Removal Installation 11 Mirror Mirror Adjustment 12 Inside Mirrors 12 8 Dia Supplemental Rearview Mirror 13 Outside Mirrors 1...

Page 3: ...Preventive Maintenance Check List 30 Glass Replacement 32 Split Sash 32 Rear Vision 34 Entrance Door 34 Doors 35 Door Control Maintenance Adjustment 35 Lubrication Windows Hinges Locks 36 Floor Cover...

Page 4: ...an inves tigation and if it finds that a safety defect exists in a group of vehicles it may order a recall and remedy campaign However NHTSA cannot become involved in individual problems between you y...

Page 5: ...equipment to insure reliable and safe transportation of passengers Some examples of this safety equipment are stop arms crossing guards warning lights warning light monitors mirrors first aid kits fir...

Page 6: ...icle Certification Plate certifies that the vehicle con forms to all applicable Federal Motor Vehicle Safety Standards in effect at the date of manufacture Do not remove or deface this plate This plat...

Page 7: ...adlights wipe clean Exhaust tailpipe clear Bump tires OK Lug nuts in place Drain air brake tanks Look under bus all clear General outside appearance clean for school bus identifica tion Mirrors clean...

Page 8: ...asher warning lights front and rear clean and flashing Stop arm if used clean and working Headlights hi lo beams Stoplights and taillights clean and working Hazard flasher working Final check as you m...

Page 9: ...latch slide bars to be lubricated with light grease to reduce friction Tighten all body tie down bolts to 38 foot pounds torque at 1 000 miles 2 000 miles and quarterly thereafter Grease emergency do...

Page 10: ...rning light monitor 8 Clearance lamps 9 Dome lights 10 Underseat heater 11 Heater pump 12 Mirror defrost 13 Auxiliary fan 14 Strobe Light 15 Destination sign 16 Lift 17 Stop arm Crossing arm 18 Switch...

Page 11: ...NANCE Inspect seat belt assembly frequently Anytime assembly does not work properly or if there are any defects in the webbing i e torn or frayed the seat belt must be replaced as soon as possible to...

Page 12: ...rward retaining channel frame 4 Tighten with phillips type screw driver until clamps do not rotate SEAT CUSHION REMOVAL INSTALLATION DOT SEAT BELT SEATS Removal 1 Loosen the two front swivel type clam...

Page 13: ...at has disembarked and have confirmed that the passenger of the bus Failure to follow these proce dures could cause serious injury or death Leftandrightfrontfendermountedconvexcrossviewandleft and rig...

Page 14: ...he outside rearview convex driving mirrors CAUTION A convex mirror has a curved surface and is de signed to provide a wide view with minimum distortion How ever persons or objects seen in a convex mir...

Page 15: ...overlaps the view provided by the RH flat driving mirror and so that the RH side of the bus body is visible in the inside edge of the RH convex mirror 4 Adjust the LH flat driving mirror and the LH c...

Page 16: ...12 FEET FROM FRONT BUMPER 6 FEET FROM FRONT BUMPER FACE OF FRONT BUMPER CENTERLINE FRONT AXLE OUTSIDE OF BUMPER OUTSIDE OF BUMPER CENTERLINE OF BODY CENTERLINE REAR AXLE 6 FEET FROM OUTSIDE BODY 1 FO...

Page 17: ...at The first aid kit is mounted above the windshield on the right hand side of the bus body Different size kits are supplied in various bodies because of different state specifications Check quarterly...

Page 18: ...217 Bus Window Retention and Release All emergency exits should be inspected and operated daily to insure they are labeled and op erate properly per the instruc tions provided Rear Emergency Door EME...

Page 19: ...rmit the stop arm to be withdrawn while warning lights are in operation For those situa tions an audible alarm sounds to alert the driver of the condition HEATERS GENERAL INFORMATION Blue Bird heaters...

Page 20: ...s are open For your own safety do not leave the engine running while opening or closing valves Warm up the engine to operat ingtemperaturewiththeengineatfastidle ifpossible andturnon the heater fans a...

Page 21: ...avelling at highway road speedscausesacceleratedheatdissipationthroughthewindshield glass andeachpassengercontinuallyaddstothemoisturecontent of the air within the bus After a period of time the moist...

Page 22: ...iagram 25 HEATER 50 UNDERSEAT HEATER HEATER CLAMP TRIM CLAMP ACCESS OPENING WALL VIEW FROM TOP TYPICAL CLAMP ORIENTATION AT HEATER CORE CONNECTION 50 UNDERSEAT HEATER 50 UNDERSEAT HEATER 25 HEATER PIP...

Page 23: ...dure 1 With engine off shut engine heater return gate valve or clamp closed heater return hose as close to engine as possible Close temperature control on dash by turning clockwise 2 Fill cooling syst...

Page 24: ...ses are harmful and potentially lethal Carbon monoxide is colorless and odorless but can be present with all other exhaust fumes Therefore if you ever smell exhaust fumes of any kind inside your vehic...

Page 25: ...007367 53 EXTERIOR LIGHTS Directional KD 772 9105 1156 Weldon 1010 Series Red Amber Plain w Arrow 1156 Signal Stat 1604 1156 Warning Light Weldon 1020 Series Red Amber 4636 Cluster Marker Weldon 5050...

Page 26: ...1 38 Tail Lamp 2 1 18 Ignition 1 2 50 Instrument Panel 1 00 Headlamps Dual Low Beam 2 8 40 Parking Lamps 2 1 18 90 FC MB Heater 1 27 00 90 Conv Heater 1 31 50 Intermittent Load Item No Items Amps Step...

Page 27: ...options include lights and standard thermal flasher Constant Load Item Opt No Amps Auxiliary Fan 0525 3 0 0530 6 0 0532 0546 3 0 Exhaust Fan 0552 2 0 Heater 1145 31 5 1153 9 0 1230 2 5 1325 1330 4 5 1...

Page 28: ...1931 4 79 1940 6728 4 20 Warning Lights 1987 1990 1992 2013 2016 2017 12 50 2025 10 00 Solenoid Switch 2130 2131 75 DOT Buzzer 3001 01 1 00 3001 02 1 50 3001 03 2 00 Chime System 3040 1 00 Stop Arm w...

Page 29: ...2 Red 2 Amber Front Identification Lamps 3 Amber Front Clearance Side Marker Lamp 2 Amber Rear Clearance Side Marker Lamp 2 Amber Rear Side Reflector 2 Red Front Side Marker Lamp 2 Amber Chassis Suppl...

Page 30: ...Identification Lamps 3 Amber Rear Reflector 2 Red Rear Tail Stop Lamp 2 Red Rear License Plate Lamp 1 White Combined with Tail Lamp Rear Turn Signal Lamp 2 Red or Amber Used as Turn Signals and Hazar...

Page 31: ...Outer Surface for Cleanness Wash as Needed Check Under Floor Underside Structures for De Icing Chemical Buildup Keep These Areas Free of Chemical Deposits Check All Lights Signals Check for Component...

Page 32: ...MICRO BIRD 31 30 Days Annually Quarterly Daily 1000 Miles 2000 Miles Yearly Thereafter...

Page 33: ...se of proper replacement parts tools and personal protective equipment such as gloves and safety eyeglasses SPLIT SASH 1 Remove four screws securing window to bow Fig 1 2 Pull window to inside of body...

Page 34: ...MICRO BIRD 33 Fig 3 Fig 4 Fig 5 WINDOW SHOWN WITH FRAME DISASSEMBLED...

Page 35: ...lass on bottom window flange from the inside of bus body Pull cord slowly and work glazing rubber onto the window flange Fig 7 6 Apply pressure from the inside of bus body to insure glass is seated pr...

Page 36: ...h eliminates effect of body construction variations on door and seal operation Doors are suspended completely on scaled ball bear ings located at the top corners of the framework inside the body The i...

Page 37: ...door and all exterior hinges should be lubricated every thirty days with a light weight oil 3 Insidehingesanddoorcontrolhardwareshouldbelubricated quarterly with a light weight oil 4 A heavy grease s...

Page 38: ...nyexcesswaterupas soon as possible because this may cause the covering to separate fromthesub floor Ifseparationdoesoccurand bubbles appear cut the material to gain access to the underside Clean the u...

Page 39: ...e accumulated residue and eliminate any weathered appearance FOREIGN MATERIAL DEPOSITS Calcium chloride and other salts ice melting agents road oil and tar tree sap bird droppings chemicals from indus...

Page 40: ...a Never sit in a parked or stopped vehicle for any extended amount of time with the engine running Exhaust gases particularly carbon monoxide may build up These gases are harmful and poten tially leth...

Page 41: ...stination Signs 37 Door Control Maintenance Adjustment 35 Drain Holes 37 Emergency Equipment 16 Emergency Exits 17 Entrance Door Glass Replacement 34 Floor Covering 37 Forward 4 Glass Replacement 32 H...

Page 42: ...heck List 30 Rear Vision Glass Replacement 34 Reporting Safety Defects 3 Quarterly Maintenance Check List 8 Seat Belt Inspection 10 Seat Belt Operation Driver s Seat 10 Seat Belt Operation Passenger s...

Page 43: ...Part Number 1974559 Blue Bird Corporation P O Box 937 Fort Valley GA 31030...

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