MACK MAN Posted January 8, 2014 Share Posted January 8, 2014 I'dI have air wipers on military truck,it has two motors and one air valve.I have a air leak at one of the motors,I believe it is leaking from the vent on the motor.I had a new air valve so I replaced the air valve,it still leaks.My question is does the motor always have air going to it to keep pressure on the wiper when it is in the parked position.I hate to spend 400.00 on a new motor it's it not that. Al Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/ Share on other sites More sharing options...
doubleclutchinweasel Posted January 8, 2014 Share Posted January 8, 2014 I'dI have air wipers on military truck,it has two motors and one air valve.I have a air leak at one of the motors,I believe it is leaking from the vent on the motor.I had a new air valve so I replaced the air valve,it still leaks.My question is does the motor always have air going to it to keep pressure on the wiper when it is in the parked position.I hate to spend 400.00 on a new motor it's it not that. AlI don't think so. If its like the civilian ones, I believe the air is only ported to it in "run" & "park" modes. But, I don't really consider myself an expert on it! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225311 Share on other sites More sharing options...
MACK MAN Posted January 8, 2014 Author Share Posted January 8, 2014 One reason I think air is always going to the wiper motor is,the one motor that is not leaking air when the truck sits and losses air it's wiper arm hangs down.Than after I start the truck and it gets up to 70lbs or so the wiper goes to the top of the windshield and stays there. Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225316 Share on other sites More sharing options...
doubleclutchinweasel Posted January 9, 2014 Share Posted January 9, 2014 One reason I think air is always going to the wiper motor is,the one motor that is not leaking air when the truck sits and losses air it's wiper arm hangs down.Than after I start the truck and it gets up to 70lbs or so the wiper goes to the top of the windshield and stays there.Maybe a little air leaking through the control valve?C'mon. Somebody out there HAS to know this one! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225530 Share on other sites More sharing options...
Popular Post j hancock Posted January 9, 2014 Popular Post Share Posted January 9, 2014 Sorry, change them to electric if I can. My Macks are all electric and the Brockway is air. It works well which is good because it is buried under the dash. 3 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225533 Share on other sites More sharing options...
KECorbin22 Posted January 9, 2014 Share Posted January 9, 2014 My experience with military trucks, possible the wiper motor has a sticking directional valve, remove air hose to wiper motor and spray a little W-D 40 into and reconnect air line and allow to work for awhile. The other thing you might want to try is with the air off, move the arm back into park position manually (either to the extreme right or left) and check for air loss. Its been 20 plus years sense I work on them. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225569 Share on other sites More sharing options...
Freightrain Posted January 9, 2014 Share Posted January 9, 2014 I'm the odd man out. My air wipers work great. Pulled the motor out, cleaned all the 50yr old sludge out of it and some new lines and it will literally try to throw the blades off the arms they run so fast. I did have to clean out the valving in the end that reverses the motor. I doubt the air is suppose to hold the wipers up. I remember my buddies COE and after hitting a bad bump having to flip the wiper switch to get them back up again.Try here:http://www.marinepartsunlimited.com/index.htm?trico-folberth.htmlArt used to be on here, I know he is on other boards that I frequent. He knows his stuff about air wipers. 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225586 Share on other sites More sharing options...
Mike Posted January 9, 2014 Share Posted January 9, 2014 Sorry, change them to electric if I can. My Macks are all electric and the Brockway is air. It works well which is good because it is buried under the dash.I heard that. Sometimes I feel that Mack must have installed all of the hardware in those dashes and welded them to the supports last thing. Too difficult to get to that area.mikemike Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225592 Share on other sites More sharing options...
Mike Posted January 9, 2014 Share Posted January 9, 2014 I'm the odd man out. My air wipers work great. Pulled the motor out, cleaned all the 50yr old sludge out of it and some new lines and it will literally try to throw the blades off the arms they run so fast. I did have to clean out the valving in the end that reverses the motor. I doubt the air is suppose to hold the wipers up. I remember my buddies COE and after hitting a bad bump having to flip the wiper switch to get them back up again.Try here:http://www.marinepartsunlimited.com/index.htm?trico-folberth.htmlArt used to be on here, I know he is on other boards that I frequent. He knows his stuff about air wipers. LOL........Larry I believe your going to have ta punch a pin hole size hole in that airline so those wipers won't fly off the windshield. LMAO. mike Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225593 Share on other sites More sharing options...
thomastractorsvc Posted January 9, 2014 Share Posted January 9, 2014 my B leaked from the motor and I could not get it to stop and did not want to spend big money to fix since I try not to run it in the rain so I installed a shut off valve in line to the control valve, when I need to use the wipers I just turn on the valve and use like normal, and when the truck is shut off it does not leak air any more, probably not a lasting fix but one that works for me. Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225594 Share on other sites More sharing options...
Freightrain Posted January 9, 2014 Share Posted January 9, 2014 I thought about installing an electric solenoid hooked to the ignition switch that way the wipers have air with the key. Then when the truck is off it keeps from bleeding the air off so fast(like mine does now). I only get an hour or so before it kills all my air. When I put a new o-ring in the dash control it lasted a day. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225634 Share on other sites More sharing options...
thomastractorsvc Posted January 10, 2014 Share Posted January 10, 2014 Larry,Have you priced one of those switches? Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225689 Share on other sites More sharing options...
Freightrain Posted January 10, 2014 Share Posted January 10, 2014 No, not yet. Just another "project" that floats in my mind. Sure the china models are cheap, Parker or such will be much more expensive. Depends on how long you want it to last. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225817 Share on other sites More sharing options...
MACK MAN Posted January 11, 2014 Author Share Posted January 11, 2014 Found out that on the wiper motors on my military truck always have air going to them.I found a new motor and air valve on ebay for 100.00 it will be here next week Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225970 Share on other sites More sharing options...
Freightrain Posted January 11, 2014 Share Posted January 11, 2014 Good to hear you got it figured out. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225971 Share on other sites More sharing options...
doubleclutchinweasel Posted January 11, 2014 Share Posted January 11, 2014 Found out that on the wiper motors on my military truck always have air going to them.I found a new motor and air valve on ebay for 100.00 it will be here next weekHmmm....interesting! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225984 Share on other sites More sharing options...
Popular Post phildirt Posted January 11, 2014 Popular Post Share Posted January 11, 2014 You don't need no stinking windshield wipers- that's why the invented Rain-X- for owners of B and R model Macks. 1 4 Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-225987 Share on other sites More sharing options...
burnin oil Posted February 3, 2014 Share Posted February 3, 2014 I'm the odd man out. My air wipers work great. Pulled the motor out, cleaned all the 50yr old sludge out of it and some new lines and it will literally try to throw the blades off the arms they run so fast. I did have to clean out the valving in the end that reverses the motor. I doubt the air is suppose to hold the wipers up. I remember my buddies COE and after hitting a bad bump having to flip the wiper switch to get them back up again.Try here:http://www.marinepartsunlimited.com/index.htm?trico-folberth.htmlArt used to be on here, I know he is on other boards that I frequent. He knows his stuff about air wipers.I tried that on my L model. Worked on the drivers side but the passenger was plumb wore out. The aluminum cylinder just isnt round any more. I tried packing the piston good with grease and that worked for about 5 minutes. Now it tends to hang up when it switches direction. Quote Link to comment https://www.bigmacktrucks.com/topic/34153-air-wiper-question/#findComment-230289 Share on other sites More sharing options...
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