Wiley Posted August 30, 2021 Share Posted August 30, 2021 Would anyone be able to tell me where the airline that’s supposed to be in the empty port goes to? I really appreciate the help. Quote Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/ Share on other sites More sharing options...
85snowdog Posted August 30, 2021 Share Posted August 30, 2021 There is no air line off of that . Its an exhaust for the wiper motor. If it gets plugged at all the wipers won't work. Because its leaking air , It sounds like it is ok . Your problem is somewhere else. The first thing I would try is taking the air lines off the other side and put some air tool oil in them . Sometimes that's enough to get them going . Otherwise you may need a rebuild kit. I don't know much about that , but its been talked about on here . The air tool oil or penetrating oil has always worked for me . Quote Keith Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479144 Share on other sites More sharing options...
85snowdog Posted August 30, 2021 Share Posted August 30, 2021 Just thinking about it ..... Do the wipers work ? If everything works ok and just leaks out the exhaust , I would say the are not going in the park position . Then I would be looking at the control valve . Quote Keith Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479145 Share on other sites More sharing options...
Wiley Posted August 31, 2021 Author Share Posted August 31, 2021 The wipers come on sporadically for no reason and I was told that parking break doesn’t work. When you shut off the truck you can hear air leaking and I tracked it down to hear. I’m confused. Quote Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479153 Share on other sites More sharing options...
85snowdog Posted August 31, 2021 Share Posted August 31, 2021 (edited) When you shut the wipers off ,you put them into park position . If they are coming on sporadicly, I would lean toward the control valve . Its on the right side of the pic . I think ? its part # would be 7623-7547070 but not sure . Hopefully Watts can help you or a local to you Mack dealer Edited August 31, 2021 by 85snowdog spelling Quote Keith Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479154 Share on other sites More sharing options...
Wiley Posted August 31, 2021 Author Share Posted August 31, 2021 So does the bottom port in the pic ( the one with the compression nut) not supposed to be hooked to anything? Quote Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479162 Share on other sites More sharing options...
85snowdog Posted August 31, 2021 Share Posted August 31, 2021 No it's not. Air exhaust out of it when the wipers are on. Quote Keith Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479171 Share on other sites More sharing options...
Wiley Posted August 31, 2021 Author Share Posted August 31, 2021 58 minutes ago, 85snowdog said: No it's not. Air exhaust out of it when the wipers are on. Thank you sir. I will investigate. Quote Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479175 Share on other sites More sharing options...
85snowdog Posted September 1, 2021 Share Posted September 1, 2021 Before you buy anything or tear everything apart , take the supply line off the control valve and put some air tool oil in it . Then turn wipers on and off a lot , keep putting them in park , if truck has been sitting for a while , might be enough to solve your problem . In case you didn't know , park position is important . If your wiper control is pull out and turn to the right to increase speed , the park is... push in all the way till wipers go back to the bottom . If you turn the wiper control to the right to turn it on and increase speed , turn to the left all the way till wipers go back to the bottom . When they are in park, no air should go to the motor and therefore no air leaking out the exhaust . Just my thought anyway 1 1 Quote Keith Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479212 Share on other sites More sharing options...
Wiley Posted September 1, 2021 Author Share Posted September 1, 2021 12 hours ago, 85snowdog said: Before you buy anything or tear everything apart , take the supply line off the control valve and put some air tool oil in it . Then turn wipers on and off a lot , keep putting them in park , if truck has been sitting for a while , might be enough to solve your problem . In case you didn't know , park position is important . If your wiper control is pull out and turn to the right to increase speed , the park is... push in all the way till wipers go back to the bottom . If you turn the wiper control to the right to turn it on and increase speed , turn to the left all the way till wipers go back to the bottom . When they are in park, no air should go to the motor and therefore no air leaking out the exhaust . Just my thought anyway Thank you very much sir. I will do this. Quote Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479236 Share on other sites More sharing options...
85snowdog Posted September 2, 2021 Share Posted September 2, 2021 Hope it works . Please let us know how you make out . Quote Keith Link to comment https://www.bigmacktrucks.com/topic/67895-i-found-my-air-leak/#findComment-479296 Share on other sites More sharing options...
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