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Author Topic: bus shutting down  (Read 992 times)
codretaw1
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1965 mci 5A south lyon, michigan




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« on: April 01, 2013, 06:07:05 PM »

hi guys have a mci5A 8V71N bus was running great went for ride the other day and she quit waited about 10 min's fired rite up went 10 miles more same thing ?
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gus
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« Reply #1 on: April 01, 2013, 07:34:00 PM »

Clogged fuel filter.

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PD4107-152
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gumpy
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Slightly modified 1982 MC9


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« Reply #2 on: April 02, 2013, 03:11:14 PM »

Sounds like it could be related to the safety shutdown. Are you getting any tell-tale lights when it shuts down?  Low oil, hot temperature, low water?

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Craig Shepard
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http://bus.gumpydog.com - "Some Assembly Required"
codretaw1
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1965 mci 5A south lyon, michigan




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« Reply #3 on: April 02, 2013, 05:41:37 PM »

no gumpy i think i mite have some issues with the radiators iam also changing temp sensor when it shuts down no dash lites and gauge is not over 200 , going to drain the system and flush it
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John316
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MCI 1995 DL3, DD S60, Allison B500.




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« Reply #4 on: April 02, 2013, 07:14:32 PM »

Hiya, John. Glad to see you over here too. Just make sure you don't abandon us over at mcibustalk.com

I would also bet that something is throwing a fit and shutting it down....Now just to find what.

John
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MCI 1995 DL3. DD S60 with a Allison B500.
gumpy
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« Reply #5 on: April 04, 2013, 05:58:13 PM »

no gumpy i think i mite have some issues with the radiators iam also changing temp sensor when it shuts down no dash lites and gauge is not over 200 , going to drain the system and flush it

My point is that the symptoms indicate possible safety shutdown, of which temp-stats are one part. They can short out internally and cause the exact symptoms, even though the bus
is not over 200*F. Also, tell-tale lights may or may not be working properly, also (burned out bulb, wiring issues, etc). If you have history with the bus, you should know if
your lights are functionally accurate.

Easy way to test if the problem is safety system related is to remove the wires, one at a time from the temp-stats, low oil switch and low water sensor (if you have one).
If the bus stays running, that's the culprit.
« Last Edit: April 04, 2013, 06:00:40 PM by gumpy » Logged

Craig Shepard
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http://bus.gumpydog.com - "Some Assembly Required"
robertglines1
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« Reply #6 on: April 04, 2013, 07:05:42 PM »

A worn elect relay or solenoid will heat contact slowly then loose contact. When it cools off it will repeat process. I call them ghost! Hard to find. The last one to do it to me was on a MCI 8 and was in line with the ignition switch located in the front elect compartment( a ford like solenoid).  FWIW  Good luck.. one of many possibilities.   Bob
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luvrbus
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« Reply #7 on: April 04, 2013, 07:18:24 PM »

Yep Bob on my 8 the skinner valve would leak by shutting the engine off then when you would turn the switch back on it would reset go 10 to 15 miles it would do it again took a while to figure it like 2 days lol
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