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Author Topic: air wipers  (Read 514 times)
uemjg
jerry
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« on: December 04, 2013, 05:33:41 PM »

I have the factory air wipers on a 77 mci-8 and while troubleshooting issues with them not working well ive come across a possible problem.

Will the air wipers not work if the port labled PK (to the right of the IN port) is not connected?

Also, since the air motors have 2 ports labled PK does it matter which one is used?
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Dave5Cs
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1979 MCI MC5Cs 6V-71 644MT Allison, Roseville, CA




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« Reply #1 on: December 04, 2013, 05:47:11 PM »

Those are your park ports. they control where your wipers stop. on mine and in my 5 book they have hoses on each IIRC. they open and close with air feeds to them from the controls.
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My personal skills are fine.. itís my tolerance to idiots that needs work!....

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chessie4905
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« Reply #2 on: December 04, 2013, 05:54:55 PM »

   I just rebuilt mine on my 4905. It has both outlets, however one isn't drilled depending on which side of the coach the motor is mounted.
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GMC h8h 649#028
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uemjg
jerry
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« Reply #3 on: December 04, 2013, 07:27:14 PM »

Well the only thing i did was put new compression nuts on the air line to the wiper motors and they work fine...must have been leaking air.

Thanks for the suggesions.
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