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 Thomas Bus - No Throttle Sometimes
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trolleytoursvt
New Member

USA
1 Posts

Posted - 10/10/2018 :  6:13:37 PM  Show Profile  Visit trolleytoursvt's Homepage  Reply with Quote
1997 Thomas Bus throttle controls on a Dupont Trolley Champlain Model 1608, Thomas bus air controls doors, etc. Cat engine C7 pusher, Freightliner chassis.

The throttle fails to work after opening the passenger's side door, SOMETIMES! Sometimes it comes back after working the controls, as of late I have had to let the vehicle sit, engine off for 30 to 60 minutes and then the throttle will work. IF, I release the emergency valve and open the door manually, the throttle doesn't seem to be affected.

So, which control might this be, the air operated door switch or the transmission modulator...... I have no other idea!!!

Ric

Edited by - trolleytoursvt on 10/18/2018 07:15:41 AM

tigger2
Advanced Member

USA
469 Posts

Posted - 10/23/2018 :  11:47:58 AM  Show Profile  Click to see tigger2's MSN Messenger address  Reply with Quote
On some of the Thomas door air cylinders there is a switch that is held in place by a hose clamp wrapped around the cylinder. The switch is activated by the shaft spool inside and senses the door closed, the clamp sometimes comes loose and shifts the switch out of adjustment.
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