PD 4106

[olebusman]

  Make sure the air lines are connected correctly on the new valve. After rebuilding my wiper motors on my 4106 they have worked great for 20 years and 125,000 miles.

[Busidiot!]

Thank you everyone for all your help. My husband spoke to Luke at US Coach today and originally , Luke said the motors needed to be rebuilt. But before he can do that, he asked Luke about all the oil he was finding when working in that area.(I forgot to mention that in the post) Luke said that the PO may have put regular oil in the washer motor to lubricate it,ruining seal and such. or could be a oil being blown into air system thus ruining brake seals and all air system. Hopefully, it just localized to motors and not air system. We will try to find out tomorrow. Both of us work, so hard to find time until the weekend. Thanks again and found much of your information very useful.

[Utahclaimjumper]

 Make sure you drain the "ping" tank (at the rear of the coach) regularly to minimize the oil onto the air system.>>>Dan

[eagle19952]

Make sure you drain the "ping" tank (at the rear of the coach) regularly to minimize the oil onto the air system.>>>Dan

..if you have oil in the tank...you need a compressor.
the only thing besides air is moisture in the tank.

[Busidiot!]

I would like to apologize for not updating our Vin number on our profile. We have been very busy trying to get our bus running, with little to no success. First, We did get rebuild kits for the wiper motors and rebuilt them. All is working fine. We have replace all leveling valve linkages and all all front air bags are brand new. New air compressor, new governor, ran de-natured alcohol through the system and cleaned sludge out. Had some problems with regulator air pressure at 120 while driving, so new governor went on, and turns out it was the air pressure gauge. Last night we ran the bus for about 5 hours, with an external air pressure gauge and had the governor set to shut off  at 120psi, but when driving it was only at 100psi , but did not drop below that. Is this correct pressure? I was told it should stay at 120 psi when driving down the road, regardless of how many air leaks it might have.
    Second, today we disconnected to main line coming in from the auxiliary air tank  and oil poured out of the line. I assume this is not normal. I have a new compressor, as mentioned above, so what could be causing this?
Once again, thank you for all of your help.

[chessie4905]

Start by opening all the air tank drains and let them drain for 24 hours. Like an oil can, it takes a while for all the oil to drip out.  Leave that line drain that long also. There should be a large sausage shaped ping tank or muffler mounted above and to rear of compressor. It should also have a drain on it.

[Red Rider]

My 4106 and my 4108 have rebuilt air wiper motors and work just fine. For the cost of replacing with electric units a person would really. need to have a disregard for saving money for what is gained.

While rehabbing my systems I found (in the book) the online wiper motor filter must be cleaned. . That might be a new starting point. . Also Rome truck parts in Rome Ga. Has all the OEM parts to redo the wiper motors.

[chessie4905]

It is mounted on front panel under dash. Remove the end, clean piece of mesh and reassemble.