Ford 445A Steering Leak

I have a Ford 445A that is leaking gear oil from the steering arm and wondered if someone might be able to tell me where to access the oil add point? I had heard you might use corn head grease or something similar instead to slow down/stop the leak from that area. Will I have to remove those two loader hydraulic lines and two shield plates under the dash?

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Looking at the New Holland parts site it
shows a 445A to have hydrostatic steering.
Yours has a pitman arm like a 340 or 540.
You will have to get the numbers off of
this tractor so we can ID it correctly.
There should be a foil tag under the hood
with some numbers on it. Get us the model
#.
Below is a link to NH parts site that
shows a 340.
I didn't look at it real close but it
appears there are a couple of seals where
the sector shaft comes out of the steering
box.
I don't think that model uses heavy wt oil
in the bottom of the steering box like
some of the older tractors did.
My guess is the column is lubed by the
power steering fluid but I don't know that
for sure.
Properly ID the tractor for us and we'll
go from there.
340 steering gear
 
I may have misidentified the model. Just got the tractor a couple of weeks ago. The numbers are hard to read but looks like -
KD211H ?
8D21B
*C572745

It has a 420 loader on it.
 
That parts diagram for the 420 looks like what I am looking at to me. The leak is definitely gear oil by the smell. I can see the add spot on the diagram for the 420. Is it possible to replace this with something other than gear oil or should I try to replace the seals on #38? I also just changed the power steering fluid filter and refilled with 134D, is that the correct fluid for the 420?
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Key # 38 are felt dust seals #20 is seal. Can put zerk in level hole and put cornhead grease in. Comes in tube like regular grease. Arm is on real tite on tapered shaft. Seal will change without disassembling box.
 
(quoted from post at 20:38:12 02/26/19) I may have misidentified the model. Just got the tractor a couple of weeks ago. The numbers are hard to read but looks like -
KD211H ?
8D21B
*C572745

It has a 420 loader on it.

KD211F
KD2 = 420 industrial 1976-1978
1 = diesel engine
1= no pto
F= 4x4 torque convertor auto reversing trans

8D21B build date= April 21 1978 day shift
 

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