8N hydraulic dipstick says full after only 2-1/2 gallons

I just got my 8N's hydraulic system back together, and it does seem to lift OK now.

When I had the top and side inspection covers off, I made quite sure that I drained all the old Universal Tractor Transmission Fluid out of it. However, upon refilling, and even after running it a few minutes, the dipstick is reading full after I have added only 2-1/2 gallons of new fluid, not the 5 gallons it is supposed to take. Should I put 5 gallons in it anyway, or stop filling it now? Thanks a lot.
 
Assuming it is on level ground?

I would remove the inspection cover on the right side and confirm where the fluid level is. Fill till it runs out of the bottom hole then reinstall the cover and calibrate your dipstick to the level. Mine, when I acquired it, had a large nail as the dipstick. The aftermarket dipstick has a "hat" and rubber gasket that tended to slip and rest all the way in the hole. I tried spot welding and JB weld but it would not stay put. Superior craftsmanship no doubt.
 
Bill........didja drain the diffy too? Takes a square-headed pipe plug that is NOT TAPERED. Iff'n ya just drained the corner of the flat tranny case, 2-1/2 gals sounds about rite. While the 1939 spec of 80wt gear oil is still valid, Ford now recommends spec MS-132D. Fill is by the tranny shifter, and 4-1/2 gals is plenty goot enuff. Check with 6-o'clock bolt hole on 6-in roundy dipstick plate........HTH, oily Dell
 
NO!!! Do not add any more oil. As suggested, you may have not drained the old oil out completely. there are 3 plugs, beginning with the special 1/2-14 Pipe Plug. p/n 353064-S7, in the rear diffy case-always start with that one first. A standard 9/16 open end usually works as the extended square end allows. If it hasn't been removed n ages, you may need a Crescent wrench with a Breaker/Cheater bar. When you re-insert it, put a dab of Anti-Seize on the threads for ease of removal next time. I'd run engine for a good half an hour, PTO disengaged, at idle in neutral or driving around the property, whatever you prefer. Then engage the PTO and drive it around for another half hour, then park it for a good 24 hours with PTO disengaged, and leave it. Come back the next day and check oil level with dip stick. If you think it needs more oil, now add some, but experience has proven even when you thin k you have all the oil drained out, it isn't. I've only had to add up to 4 gallons max, finding out the hard way that by just adding 5 gallons, you will soon see the excess leaking out the side covers, even with new gaskets. Heck, my 8N has been running on, according to dipstick, the halfway mark al l winter no problems.

[i:654c4848f0][b:654c4848f0]<font size="4">Tim *PloughNman* Daley(MI)</font>[/b:654c4848f0][/i:654c4848f0]<table width="100" border="1" cellpadding="0" cellspacing="0" bordercolor="#000000"><tr><td height="25" colspan="2" bgcolor="#CC0000">
<font color="#FFFFFF" size="3">*9N653I* & *8NI55I3*</font>​
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Thanks for all your help, guys. Yes, I did drain the transmission and the differential. The dipstick was all messed up, but that Tip No. 4 doesn't lie. I needed to add the additional 2-1/2 gallons.
 

[color=darkblue:a8acf9c210]My 9N had the trans and engine dipsticks swapped, when I first got mine. They are NOT the same. My trans was low, but the engine was way overfilled![/color:a8acf9c210]
 

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