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tbyrd_77
New Member
1 Posts |
 Posted - 08/20/2010 : 8:35:48 PM
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| the break light and buzzer on our 1996 blue bird t2000 won't go off. I filled the fluid and checked everything I could think of but can't figure out why it is on. Any ideas? It is not the light and buzzer for the parking break, it's the one on the right side of the dash for the regular breaks. The electric aux. motor comes on when you push the pedal without the key turned on. |
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Cal Mc
Advanced Member
303 Posts |
Posted - 08/21/2010 : 8:33:53 PM
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The Aux. brake motor should cut in when you step on the brake without the key on.
Causes for the light to come on can include but not limited to;
- low brake fluid
- low fluid flow in the boost system
- faulty flow switch
- Brake pressure failure sensed by the pressure differential switch
- faulty brake light bulbs/ grounds
- brake alarm module failure
- weak primary boost pump[most systems use the power steering pump
circuit] |
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Harrison Fire
Senior Member
United States
175 Posts |
Posted - 08/22/2010 : 11:59:33 AM
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I could sure use a "the break light".
Then they would know to leave me alone or join me.
My Bad.
You must mean "the Brake Light".
This post bugged me since I have had to deal with a Hydromax as well.
A while ago,I searched online for, and found, then printed a handy, dandy manual for this puzzling setup.
Had to search 2 times today using different wording to find it again.
My suggestion is to print it out.
I have looked at it several times since I made a copy.
HF
http://rb-kwin.bosch.com/pool/usa/pdfs/HydroMax_Hydraulic_Brake_Booster_Manual.pdf |
My Fleet? (6) 93/99 IH 3800 Thomas and Blue Bird, Hydraulic Brakes, Manual and Auto Trans, (10) 00/06 FS65 Thomas Air Brake and Auto Trans, (2) 06 C2 Thomas and (2) 09/10 IC CE 300, Plus 3 more from another District |
Edited by - Harrison Fire on 08/22/2010 12:01:39 PM |
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IBTMech
Top Member
USA
973 Posts |
Posted - 08/22/2010 : 2:42:21 PM
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We traded in the last bus to use that 'break' system 5 years ago. Good riddance! We are all air now.
But, yeah, test all those switches and bulbs and pressure test your steering pump in that way overdesigned system. Harrison Fire gives you the link to the manual and he tutors air conditioning systems too. |
If it doesn't fit, FORCE it.
If it breaks, well, it needed replacing anyway.
Pullin' wrenches for 45 years. |
Edited by - IBTMech on 08/22/2010 2:46:50 PM |
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raytobe
Advanced Member
USA
293 Posts |
Posted - 08/22/2010 : 3:37:42 PM
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Progress is good. Us old timers that remember endless clutch changes and dealing with hydraulic brakes (Girling...eeeeek)can tell these younger guys how good they got it now.  |
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Cal Mc
Advanced Member
303 Posts |
Posted - 08/22/2010 : 9:22:01 PM
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Our entire fleet is still on juice brakes and 1/3 of it still uses clutches. Our clutch changes were not excessive when in a fleet of
60 buses[Two were automatic] we were changing 8-10 clutches a year.
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bwest
Administrator
United States
3820 Posts |
Posted - 08/23/2010 : 05:24:12 AM
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| Thanks for the great resource HF!! |
Bryan |
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raytobe
Advanced Member
USA
293 Posts |
Posted - 08/23/2010 : 1:22:04 PM
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quote:
Originally posted by Cal Mc
Our entire fleet is still on juice brakes and 1/3 of it still uses clutches. Our clutch changes were not excessive when in a fleet of
60 buses[Two were automatic] we were changing 8-10 clutches a year.
Heck, When ours were manual (two fleets I worked for) I did more than 10 per year by myself. More like three per month. You have my sympathy on the hyd brakes. Personally I hate working on them-- air has spoiled me. |
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Harrison Fire
Senior Member
United States
175 Posts |
Posted - 08/24/2010 : 7:43:59 PM
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Glad to help.
Now we need a manual for those new Navistar hydraulic brakes.
(ISIS)
The ones that slow the vehicle when the park is set and don't lock till it is stopped.
Hopefully I will never need one.
HF |
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BJ Henderson
Advanced Member
USA
280 Posts |
Posted - 08/25/2010 : 5:32:38 PM
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Harrison Fire, do you like ISIS? Yes, we have it, too, but I wish they had enhanced wiring diagrams for pre-2007 models.
I have a 1998 with dash problems that is blowing the fuse with the IP cluster plugged in, yes it is a new cluster. I'm trying to dig through ISIS between the crisis management of school startup, and training drivers, and aides. Anyway, it is getting real interesting with all the buses being checked out Friday for routes.
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CMTT,CMAT,CMBT |
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Harrison Fire
Senior Member
United States
175 Posts |
Posted - 08/26/2010 : 10:50:15 PM
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I have tried to use ISIS, but with a one mechanic garage, I have not had the time to learn the ways of this resource. When I get stumped, the solution is always out there. Just need to ask the right person.
HF |
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