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Rich
Top Member
United States
5768 Posts |
 Posted - 05/17/2002 : 7:37:33 PM
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Hey everyone!
This question pertains to the International 3800 chassis.
Is it normal for the speedometer to be somewhat delayed when accelerating and braking?
Is it normal for the speedometer to read 5 MPH when the bus is idle?
I notice this on EVERY 3800 I ride on, whether Blue Birds, Thomases, AmTrans, or Carpenters.
Thanks in advance! 
-Richard Solano
Check out my bus store: http://www.cafepress.com/schoolbus
and: http://www.cafepress.com/schoolbus2
Check out my bus site: http://museummiddle.tripod.com |
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wagonmaster
Top Member
USA
2298 Posts |
Posted - 05/17/2002 : 7:48:19 PM
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The speedometer shouldn't be delayed by any appreciable amount. They will, however, show a low speed when idling. We are talking about the electronic speedometers here, not the old cable drive type. They began about 1989. The sending unit or transducer can be adjusted to correctly reflect proper speed during acceleration and braking.
Joe
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1983WardFord
Top Member
USA
1395 Posts |
Posted - 05/17/2002 : 7:50:23 PM
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In my driving experience, yes, I've seen a bunch of 3800 speedometers that are delayed, but only by a small amount of time. Nothing major, really. Just as long as they read something close to the correct speed eventually. As far as the 5 MPH idle, I don't think there's a spot for zero MPH on there. The needle appears to be set at the lowest speed on the speedometer, which happens to be 5 MPH.
Superior--built tough, built to last! |
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1983WardFord
Top Member
USA
1395 Posts |
Posted - 05/17/2002 : 8:03:37 PM
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an addendum to my previous post...
I've also noticed that the needle jumps instead of making a smooth sweep like the cable-driven speedometers. Take a good look next time and see if it happens
Superior--built tough, built to last! |
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Rich
Top Member
United States
5768 Posts |
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BusguyII@webtv.net
New Member
8 Posts |
Posted - 05/17/2002 : 10:00:54 PM
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Replace the instrument panel ( IHC's ) are famous for that! ( I would bet that's not the only gauge bouncing around )
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Rich
Top Member
United States
5768 Posts |
Posted - 05/18/2002 : 10:19:28 AM
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quote:
Replace the instrument panel ( IHC's ) are famous for that! ( I would bet that's not the only gauge bouncing around )
You're right... every gauge does that. I always thought the bus was gonna run out of gas, but then... JUMP... back up to half. hehehehe
-Richard Solano
My Online School Bus Store: http://museummiddle.tripod.com/schoolbuscentral/id18.html
My School Bus Webpage: http://museummiddle.tripod.com |
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B. Busguy33
Top Member
USA
3444 Posts |
Posted - 05/18/2002 : 1:00:41 PM
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I have noticed this on every International school bus I have ridden on. I believe this "problem" also affects their medium-duty trucks as well.
First of all, when the driver turns the ignition key to the "on" position, you may notice that just about all of the needles on the dashboard go down to 0, then they jump up to whatever the other end of the gauge reads (i.e. fuel = F, MPH = 85, etc.) then they will go back down to 0 again and then the tachometer jumps up to about 700 RPM if the bus is still idling. Or if it's moving by the time it's on and running, then the RPM and MPH needles will jump up to whatever the speed is. At this time, all of the other needles for the other gauges to their respective spots.
If the bus is running and the driver begins accelerating, the needle will delay by a few seconds by staying at or near 0, then it will soon jump up to 5, 10, or 15 MPH after that short amount of time.
I also notice when the bus gets shut off, sometimes the MPH needle will "jump" to 15 or 35 MPH or wherever it decides to land.
I think it's fun to watch! hehehe
__________________________________________
-Bob
(a.k.a. B. Busguy33)
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thomas86_a
Top Member
USA
4413 Posts |
Posted - 05/18/2002 : 1:05:02 PM
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bbusguy33
That sounds about what all of our buses do.
"Thomas Parking Only- All others will be crushed."
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Sherm
Top Member
USA
621 Posts |
Posted - 05/21/2002 : 12:17:54 PM
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We've had quite a bit of trouble with our 1998 and 1999 models. The speedometers/odometers simply quit working altogether. In one bus, the entire cluster was replaced after the local dealer stared at it scratching their heads for two weeks.
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Delayed/Inaccurate Speedometer
