e9500v8 Posted March 4, 2013 Share Posted March 4, 2013 I have an 88 Superliner with air wipers. They don't work. So I put a new air switch on and still don't work. They will try to work and will work when they want. So I went to Mack and parts man tells me it takes a 63QT411 motor well it don't. If anyone knows the number for the correct motor I would appreciate it. Quote Link to comment Share on other sites More sharing options...
Lmackattack Posted March 4, 2013 Share Posted March 4, 2013 They made an air version and electric. As far as I know the coupling was the same not sure if it mounts in the same holes. A later model rd should work? Quote Link to comment Share on other sites More sharing options...
farmer52 Posted March 4, 2013 Share Posted March 4, 2013 I have an 88 Superliner with air wipers. They don't work. So I put a new air switch on and still don't work. They will try to work and will work when they want. So I went to Mack and parts man tells me it takes a 63QT411 motor well it don't. If anyone knows the number for the correct motor I would appreciate it.Send a note to Barry at Watt's with your VIN and he may be able to help. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment Share on other sites More sharing options...
Freightrain Posted March 4, 2013 Share Posted March 4, 2013 Make sure the air feed line to the motor is good(or the feed to the valve on the dash). Had mine get old and crusty/hard and would not pass air well. New line and WOW....they run like the devil! Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
MACKS Posted March 4, 2013 Share Posted March 4, 2013 Oil in the air system if you have any will make its way into the motor and gunk it up,problems are more noticeable in cold weather,might just need a good cleaning. Quote Link to comment Share on other sites More sharing options...
Freightrain Posted March 4, 2013 Share Posted March 4, 2013 The valve on the end of the motor might be sticky. It reverses the air pressure to move it back and forth. Could just need some clean up.Mine "worked", but was slow and random. With some attention they work like rapid fire now. I know most guys just want to get rid of them, but with some maintenance I think they do fine. Little more cantankerous then electric, but not horrible. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
e9500v8 Posted March 5, 2013 Author Share Posted March 5, 2013 Thanks guys I DON'T want to get rid of the air wipers !! I will have to take it off and give it a good cleaning. It very well could be just oil in system cuz they don't work at all in cold weather!! Quote Link to comment Share on other sites More sharing options...
e9500v8 Posted March 5, 2013 Author Share Posted March 5, 2013 I will let you know the outcome ! Quote Link to comment Share on other sites More sharing options...
eddalex Posted April 6, 2013 Share Posted April 6, 2013 A related problem - on my 1961 B61, the wiper valve switch will turn sometimes and not turn sometimes. Any ideas? I don't mean to hijack the thread but its kinda the same problem. Quote Link to comment Share on other sites More sharing options...
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