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wd hyd trans oiling one more time

M

mark wdnorton

New User
I broke pto off wd six years ago I got another torque housing to rebild. the bearing betwene the transmision and torque tube is not sealed. I have operators manual by jensales it says use 20w or 10w for hyd pump. On the same page it says trans diff trans clutch capacity 17 qts use sae80 all year. I do understand how foaming could cause problems in hydraulics The book also says fill all three compartments through transmission filler plug. My question is because bearing between trans and hyd is not sealed oil is going to mix between gear oil and hyd oil any thougts on this by you guys will be greatly appreiciatd mark here in ohio
 

Seal is separate. Log onto this site as guest and look it up

http://agcopartsbooks.com/PartsBooksN/login.aspx?ReturnUrl=%2fEpsilonWeb%2fbook.aspx%3fbook%3dagco%2f79001544&book=agco%2f79001544
 
Stu is right, the seal is a seperate item, should be at input side of trans/hand clutch. Hand clutch is "wet", runs in the same fluid that is in trans.
Allis recommended 20# oil in hydraulic system as modern hydraulic fluids haden't been invented yet. This section also lubes the belt pulley gears, so have to keep filled even if not using hydraulic lift. Filler is the dipstick near foot clutch pedal.
Hand clutch, pto, trans,& diff use 80-90 gear lube. Holds 17 quarts. Structural webs between sections allow lube to level out, but it takes a while. To fill quicker, fill useing both square plugs on trans/diff case inside the left frame rail. Also, pto housing is the lowest point, so any condensation or rain seaping in around shift lever will settle here. In cold weather it will freeze & break out the housing.
Hint- these were originally square headed plugs, hard to get a wrench in there. Use a 12 point socket 1/8 in larger than the square head, & ratchet on extension. 3/4 square takes 7/8 inch 12 point socket. This works on almost all square heads from 3/8 inch on up.
Willie
 
Willie- hand clutch is in hydraulic housing seperate from trans. Willie you say allis recommended 20wt or hyd fluid in hyd system and you say 80-90 gear lube in hand clutch ect hand clutch is in tube with hyd pump Stu says theres a seal between trans and tourqe tube when i took it apart there was no seal just a bearing im going to check stu s website for a seal this sure has me puzzled lets get this figured out mark
 

Best read this:

17878.jpg


17879.jpg


Enlarge page as best you can.
 
Willie is right; differential, transmission and hand clutch share the same oil. Hydraulic system has a separate reservoir.
I would guess someone put this together without a seal at some time in the past.
Stu"s picture and description should help; parts and repair manuals are wonderful things.
 
Well guys I sure wish I had this computer and this site 6 years ago.Stu your information made my jaw drop. I clearly see that seal and im going out and kick that wds rear end instead of my own. Thanks a bunch for your information. if you where here id give you a beer. Brian that wd was put together sometime in its long life without a seal.But it will be put back together right this time. Im tearing her back down. Sure glad shes not completly together.Now everything you guys are saying about different oils different compartments is easy to understand. I think i will throw my torn up old books away and just use this site.Just kidding THANKS A BUNCH GUYS mark
 
Jensales Operator's manual, page 51, top photo-
seal is on engine(foot) clutch shaft toward rear, betweem the cams for hyd pump & rear bearing. Next is bearing, then pto drive gear. Pto drive gear is behind this seal & bearing, inside trans(hand) clutch chamber. Belt pulley drive gear is just forward of center bearing, where the photo shows a woodruff key.
page 26, top, right- Trans clutch...in oil...lubrication from transmission and differential filler plug, SAE80...
At least that is the way I read the text & photos.
Willie
 
For what it's worth, in 60 years that seal's just gonna leak again. I mostly top up the hydraulic oil and let it seep out all the old seals behind it.
As one old AC owner commented "they all weep some". Amen.
 
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