June 23, 2018, 11:28:15 PM

Author Topic: air wipers  (Read 1633 times)

Offline uemjg

  • jerry
  • Full Member
  • ***
  • Posts: 160
air wipers
« 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?

Offline Dave5Cs

  • Hero Member
  • *****
  • Posts: 3304
  • 1979 MCI MC5Cs 6V-71 644MT Allison, Roseville, CA
Re: air wipers
« 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.
"PATHFINDER"(Bus)
Toed 1998 Jeep TJ

Offline chessie4905

  • Hero Member
  • *****
  • Posts: 2734
Re: air wipers
« 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.
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline uemjg

  • jerry
  • Full Member
  • ***
  • Posts: 160
Re: air wipers
« 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.