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Author Topic: TPS Repair  (Read 942 times)
Len Silva
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« on: December 23, 2006, 02:03:45 PM »

I've narrowed my MD3060 problems down to a possible bad TPS.  The resistance readings are not what is expected and very narrow. The question:  Can the TPS be dis-assembled and cleaned with a solvent of some kind?  I'm thinking of electronic tuner cleaner or something. I haven't removed it yet and I can't see if it comes apart.  Any experience here?

Thanks,

Len
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Torquester
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« Reply #1 on: December 23, 2006, 03:29:11 PM »

Hi Len,

Maybe, if you can get it apart, electronic cleaner might work for a while. You will see, once you get inside, that it is just a simple rheostat. I would sugest that it has prolly lived its useful life.

hth, Tq
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Torquester
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« Reply #2 on: December 23, 2006, 03:34:08 PM »

My guess would be it started life a sealed unit, and is no more.

Even if you get it to sort of work, I doubt it will stay reliable.

Time to spend on a Cristmas present for yourself/the bus!!

Then it is done once, done permanently, and you may mess around with the other things on the "to do" list!

happy coaching!
buswarrior

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DuaneMC7
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« Reply #3 on: December 23, 2006, 03:49:53 PM »

You have a little time left, ask Santa Grin
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« Reply #4 on: December 23, 2006, 07:53:28 PM »

Keep the old TPS so that you can "orient" the new unit to exactly the same position.   Yours may not be adjustable, but many are.   I agree with the opinion that a TPS isn't typically serviceable.  The shaft seals leak and once they start to fail, they are permanently screwed. 
JR
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JR Lynch , Charlotte, NC
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Len Silva
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« Reply #5 on: December 24, 2006, 10:51:38 AM »

Never mind, the TPS is OK!
There is something really wierd about this Cummins injector pump.  When it is running everything works well but when I operate the (air) throttle with the engine off, it doesn't return to idle by itself.  Just a little push on it at the engine brings it right back.  Think I'll add another return spring.

Anyway, thats why I thought my TPS resistance readings were off.

I'm convinced now that I have a software problem.  I can see that the ECU has been replaced and it most likely was not set up properly.  I'll try to get to Allison next week.

Len
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