School Bus Fleet Magazine Forums
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums
 Professional Garage
 Enter Forum: Professional Garage
 BB accelerator cable friction, or...
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

Elliot
Senior Member

USA
54 Posts

Posted - 05/26/2015 :  5:12:49 PM  Show Profile  Reply with Quote
With my 1992 BB TC2000 Forward Control I dare claim to have one of the few successful "civilian" conversions around. We have put 48,000 miles on her in eight seasons (now total 242,000).
She has the Cummins 5.9 and the MT643.

We have always had to use quite stiff accelerator linkage return springs, to ensure proper return when I lift my foot. Recently I had to add a third spring, and now it takes "two men and a boy" to "step on it".

The linkage rod ends are new. The cable feels perfectly free when I move it by hand. (I had the radiator out the other day.) (My BB dealer had the cable rod-end in stock -- very impressive.) So... why is it not returning to idle with only normal spring tension?

Can a worn cable bind up under load, but feel free when inspected? Can something similar happen in the injection pump?

The transmission modulator cable does not seem to be the culprit, as it does not start moving until the accelerator has been moved a bit.

Any and all help is very much appreciated.

Cal Mc
Advanced Member

303 Posts

Posted - 05/26/2015 :  7:33:29 PM  Show Profile  Visit Cal Mc's Homepage  Reply with Quote
The cable can definitely bind under load and feel free when unloaded. I have seen this in different applications.
Go to Top of Page

RonF
Top Member

867 Posts

Posted - 05/27/2015 :  06:10:54 AM  Show Profile  Reply with Quote
Check the pedal pivot points too. Best buses ever built.

US Army retired CMBT
Go to Top of Page

Elliot
Senior Member

USA
54 Posts

Posted - 05/27/2015 :  10:01:05 AM  Show Profile  Reply with Quote
Pedal pivots seem all right. We are theorizing that the cable-wire has worn a groove in the housing and is now wedging itself in that groove. I will buy a new cable assembly. Thanks a million!

Elliot
1992 Bluebird TC2000 FE, 5.9, MT643
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
 


School Bus Fleet Magazine Forums © 2022 School Bus Fleet Magazine Go To Top Of Page
This page was generated in 0.03 seconds. Snitz Forums 2000