WND-7-28 PTO rebuild

[firefox]

I have rebuild kit NSN 2520-00-692-6187, but when I checked in
the 34-2-3 TM on page 844 [17-828] it shows 6 oil seals and the kit only has 5.
It has the input and output shaft seals and 3 other smaller seals the same size.

Any idea of what I am missing? I really don't want to tear into this without all the
parts on hand.

Thanks,
Bruce

 

[m16ty]

Isn't this PTO basicly the same as the deuce PTO? If so, the smaller seals are for the shift shaft. I don't understand what you're calling the "input shaft seal". The input is sealed by a gasket where it mounts to the trasmission. Are you talking about the accessory drive output?

 

[gringeltaube]

It takes 5 seals in total: One for each output shaft, two for front shift shaft, one for rear accessory shift shaft.

G.

 

[firefox]

Thanks guys, Yes, my bad, I meant the two output shafts.
Any idea why the manual calls out 6 seals? No big deal,
I am very happy to hear it is only 5!
About how long does it take for mid level mechanic to tear it
down and put it back together?
I really appreciate all the help you all give!!!!
Bruce

 

[gringeltaube]

Don't know.... being this is your first one, probably half a day?

Most certainly you already did your search homework....? like reading this one: http://www.steelsoldiers.com/showthread.php?28463-pto-rebuild.html
... if not, I would strongly recommend doing so; among other good info it tells you how to avoid destructing parts during tear down....

G.

 

[firefox]

Thanks G. I did look at that thread and I will be studying thouroughly before starting.
I saw enough pictures of the carnage to be on my toes. Also thanks for posting the pic of the mounting studs.
When I go to mount it I don't really want to drop the transmission to do it. I am no longer 18 and full of pizz. Am I in for a lot of trouble?
Thanks,
Bruce

 

[gringeltaube]

Personally I have no experience with installing these in 5tons. Possibly easier due to more work space between tranny and frame on the right side?

Trouble.....? Just keep in mind that the backlash needs to be checked and adjusted by selecting the correct gasket thickness. If you are real lucky you don't have to take it back off again....

G.

 

[firefox]

Oh, as in "make my day".......
Thanks again for all the help!
Bruce

 

[firefox]

I have been carefully reading the manual 34-2-3 carefully in preperation to the rebuild, and I noticed that they called out
cap screws instead of studs when reinstalling the PTO. Any thoughts on this?
Bruce

 

[gringeltaube]

Minimum acceptable lenght for (any type) hex cap screws there, with the spring washer, is 7/8".
Try them on - you will see they will fit only in the 12-, 2- and eventually the 4- o'clock position... and in one of them you could barely get a 5/8" long bolt in....

So better to use the correct lenght STUDS, if you don't want ending up with stripped threads out of the threaded holes in the tranny!

Also, for reference, if you look up the Duece transmission parts book TM 9-2520-246-34P, fig.12, #37 shows 6 of them, 7538668 STUD,PLAINOWER TAKE-OFF MOUNTING

If they call for cap screws there, that sure is a mistake!

G.

 

[firefox]

"If they call for cap screws there, that sure is a mistake!"

Thanks G, I figured that might be a mistake.
I am just being cautious. I really don't want to do this twice!
Bruce

 

[highfavor1004]

Where did you buy the rebuild kit from?