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joebuck Member
Joined: Jul 16, 2013 Posts: 174 Location: oxford mississippi
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Posted: Sat Jul 20, 2013 9:59 am Post subject: Wiper Problem m38 1952 |
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I have a 52 m38 wiper problem. My right wiper does not work. one thing I notice is that there is no vacuum coming from the motor to it like the left side which works fine. Any suggestions? Thanks |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16358 Location: Wisconsin
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Posted: Sat Jul 20, 2013 10:26 am Post subject: |
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Check your plumbing.
If you have the standard fording plumbing then there are two lines feeding the vac side of each wiper and two going from the fresh air in side to the air cleaner.
If you do not have the fording plumbing then there are only the two lines coming from the left side of the windshield to each wiper's vac port.
If your plumbing is correct then:
Check suction (Vacuum) at the shutoff valve with a vacuum gauge. Should be 10" to 12" between idle and 2500 RPM.
If the suction is correct then:
Check the wiper motor for lube. Spray a little bit of WD40 in the suction side of the motor as you work it back and forth by hand. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
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joebuck Member
Joined: Jul 16, 2013 Posts: 174 Location: oxford mississippi
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Posted: Sat Jul 20, 2013 10:43 am Post subject: |
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The suction side (right side of right wiper) has no suction coming from hose to air filter. Should it? |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16358 Location: Wisconsin
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joebuck Member
Joined: Jul 16, 2013 Posts: 174 Location: oxford mississippi
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Posted: Sun Jul 21, 2013 2:43 pm Post subject: |
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The suction side (right side of right wiper) has no suction coming from hose to air filter. Should it? |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16358 Location: Wisconsin
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joebuck Member
Joined: Jul 16, 2013 Posts: 174 Location: oxford mississippi
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Posted: Mon Jul 22, 2013 5:47 pm Post subject: |
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The suction side (right side of right wiper) has no suction coming from hose to air filter. Should it? |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16358 Location: Wisconsin
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Posted: Mon Jul 22, 2013 9:09 pm Post subject: |
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Now look harder at the information I have already presented you with Joe. It makes it quite clear that the wiper motor suction line gets it's suction from the vacuum pump. That leaves the second port (vent port) on the pump that has the hose going to the air cleaner without suction.
This should help you understand. Note both suction and vent ports are on the right side of the motor. References to holding finger over the end of are for the end of the removed hose not the metal ports. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
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Texbillhs Member
Joined: Apr 25, 2012 Posts: 134 Location: Pennsylvania -Avondale/Kennett Sq
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Posted: Mon Jul 29, 2013 7:25 am Post subject: Extension of the same issue - where does it go (plumbing) |
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I am installing the wiper motors - I understand the no-fording plumbing. What I have a question on is with the fording lines. They follow the right windshield frame arm and go through a grommet in the fender (same as the left), where does it go under the hood?
Second minor question - does the valve bolt to the windshield sheet metal or the roundstock frame? I can't tell from the photos and my windshield is a new one without holes - you have to drill them. The valve I have is the kind with 2 mounting ears for the screws. _________________ 1952 M38 |
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evanso1975 Member
Joined: May 10, 2010 Posts: 615 Location: North Yorkshire, UK
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Posted: Mon Jul 29, 2013 10:36 am Post subject: |
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Quote: | They follow the right windshield frame arm and go through a grommet in the fender (same as the left), where does it go under the hood? |
Into the tee on the back of the air cleaner.
Quote: | does the valve bolt to the windshield sheet metal or the roundstock frame? |
Neither. The valve clamps to the 1/4" steel tube. The valve with the "ears" is off the M38A1 (and M151, I think). The original valve looks like this:
Be sure to check out the "M38 Wiper System" album in Wes's photo album; lots of good info there.
This website is helpful too:
http://www.cj3a.info/sibling/m38vent/vent.htm
Don't forget to click on the "Page 2" link at the bottom of that page! _________________ Owen
1951 US Air Force M38
1944 F-1 1/2-ton Airdrome Trailer
1940 C15 Chevrolet CMP 11-cab
1939 DKW KS200 Motorcycle
MVT # 19406 |
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