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willysmjeeps.com :: View topic - M38a1 Retrofit with Mutt Vac Wiper Motor
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M38a1 Retrofit with Mutt Vac Wiper Motor

 
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Restomod
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Joined: Jun 23, 2017
Posts: 21

PostPosted: Fri Nov 10, 2017 5:28 pm    Post subject: M38a1 Retrofit with Mutt Vac Wiper Motor Reply with quote

I've obtained a couple of NOS Vacuum Wiper Motors that have 3 Sets of #'s

Top - 2540-00-6778-1340
Mid - DAAE07-80-C-7993
Lower - A-8/81

I figure the lower one is date of Mfr, so these must be M151 Mutt vacuum wiper motors.

Would the M151 wiper motor be a direct replacement for the M39a1 wiper motors?
If it isn't, what has to be modified to make them fit (new brackets, etc)
Can the original wiper arms be used or do those have to be replaced?
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4x4M38
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Joined: May 30, 2014
Posts: 2483
Location: Texas Hill Country

PostPosted: Fri Nov 10, 2017 6:14 pm    Post subject: Reply with quote

Short answer? Yes.

Use the search function. Several posts on how to modify the Mutt
wiper motors. Basically shortening the shaft and outer tube.
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Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php
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4x4M38
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Joined: May 30, 2014
Posts: 2483
Location: Texas Hill Country

PostPosted: Fri Nov 10, 2017 6:24 pm    Post subject: Reply with quote

Here's one by Bretto for his M38.

Note Matt who posted there as well has an A1 he did the mods to:

http://www.willysmjeeps.com/v2/modules.php?name=Forums&file=viewtopic&t=7121&highlight=m151+wipers
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Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php
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Restomod
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PostPosted: Fri Nov 10, 2017 6:41 pm    Post subject: Reply with quote

Thanks for the link, when I put in searches I didn't get any hits.
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4x4M38
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PostPosted: Fri Nov 10, 2017 8:24 pm    Post subject: Reply with quote

Be sure and use the search function directly above.

The one at the left does not work as well.

Take care,
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Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php
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wesk
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Joined: Apr 04, 2005
Posts: 12976
Location: Wisconsin

PostPosted: Sat Nov 11, 2017 12:14 am    Post subject: Reply with quote

Quote:
Top - 2540-00-6778-1340
Mid - DAAE07-80-C-7993
Lower - A-8/81


Your NSN has a typo. Only 3 digits in the 3rd group of numbers of a NSN. -678- is correct.

That is a Trico wiper motor PN SK527-16, US Army ORD# 7017830 NSN 2540-00-678-1340 as used on the M151 series.

Important specs are:
THROW ANGLE IN DEG - 135.0
ACTUATING SHAFT END CONNECTION TYPE - SERRATED
ACTUATING SHAFT LENGTH 2.750 INCHES NOMINAL
OUTSIDE DIAMETER 0.250 INCHES NOMINAL
MOUNTING HOLE DIAMETER 0.190 INCHES NOMINAL
MOUNTING HOLE QUANTITY 2
MOUNTING HOLE SPACING 3.625 IN. C TO C
MOUNTING HOLE THREAD SIZE 0.90-24


The Late M38A1 series small paddle Trico S583-1 or ORD# 500844 or NSN 2540-00-262-7576 specs. These are the same as the early M38A1 & M38

THROW ANGLE IN DEG - 130.0
ACTUATING SHAFT END CONNECTION TYPE - THREADED
ACTUATING SHAFT LENGTH 1.703 INCHES NOMINAL
OUTSIDE DIAMETER 0.250 INCHES NOMINAL
MOUNTING HOLE DIAMETER 0.190 INCHES NOMINAL
MOUNTING HOLE QUANTITY 2
MOUNTING HOLE SPACING 3.625 IN. C TO C
MOUNTING HOLE THREAD SIZE 0.190-32
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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


Last edited by wesk on Sun Nov 12, 2017 3:54 am; edited 1 time in total
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4x4M38
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Posts: 2483
Location: Texas Hill Country

PostPosted: Sat Nov 11, 2017 8:09 am    Post subject: Reply with quote

Looks like the actuating shaft is too short.
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Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php
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