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'59? 881 SOS

F

Fire/Farm

New User
I'm attempting to change all fluids and service our family's 881 for the first time in longer than I have been alive. I'm trying to get the top inspection plate off but don't know how to remove the PTO and Trans cables to remove the plate. Please help!
 
P.S. I"ve already changed the engine oil and filter, plugs and wires, all electrical components, and the seals on the rear PTO output and hyrdo pump, all without issue. When I drained every fluid, there were larger chunks of debris than I would have liked to see. That is why I"m trying to get to the hyrdo filter under the inspection plate. I"m doing all of this without a service manual. I have the original owner"s manual, but that is not helpful for anything other than capacities and specs. Does anyone have a good manual for me to order?
 
WARNING: DO NOT attempt to remove the transmission top cover unless you have secured a proper S-O-S manual and read and understood the R & R procedures. Failure to follow proper procedures can result in expensive repairs.

As an aside: Why do you want to remove the cover? There is a replaceable filter beneath the top cover but it is no longer available from any source so removal of the top cover is unnecessary unless you already have a filter.

Dean
 
I"m trying to get to the filter as to either replace it or refurbish it. With the amount of gunk in the bottom of the case I"m worried that changing the fluid is a waste of time and money without changing/cleaning the filter.
 
The filter is a non-serviceable in-line filter. There is no way to refurbish it.

Dean
 
Dean, thank you for the help. So removing it and soaking it in solvent wouldn"t do any good? What about a shop manual recommendation?
 
Thanks for the info. I"ll look into that one. I"ve also seen people on this site mention the SOS supplement manual? Is that something I would need or would the manual you listed be sufficient?
 
(quoted from post at 17:31:48 11/21/12) The genuine Ford Shop Manual covering the time period 1955-1960 contains the information you need.
This One
Click to expand...
unless he's been retrofitted with a blue transmission. This manual does not cover them.
 
Nope no retrofit. Its all the original as far as
I"m aware. It"s been in our family for a couple
generations now and I think my grandpa bought it
new. And since I can"t ask him anymore, I"m stuck
with what my dad knows about it. He knows just
slightly more about it than the dirt it stands on.
The serial number is not where it should be so I"m
going off the engine number for the year.
 
The supplement covers the Direct Drive Clutch versions of the SOS. If your SOS has the casting number 312259 in raised numerals on the left side of the housing you have the ORC version which is covered in the 1955-1960 Shop Manual. The DDC transmissions have a casting number that starts with C0NN.
 
(quoted from post at 17:16:18 11/21/12) Nope no retrofit. Its all the original as far as
I"m aware. It"s been in our family for a couple
generations now and I think my grandpa bought it
new. And since I can"t ask him anymore, I"m stuck
with what my dad knows about it. He knows just
slightly more about it than the dirt it stands on.
The serial number is not where it should be so I"m
going off the engine number for the year.
Click to expand...

I have a 971 with no serial number, that has the newer transmission. I would take the absence of serial number to be a strong indicator that the tranny is not original, although checking casting numbers will tell you for sure.
 
(quoted from post at 20:50:37 11/21/12) The supplement covers the Direct Drive Clutch versions of the SOS. If your SOS has the casting number 312259 in raised numerals on the left side of the housing you have the ORC version which is covered in the 1955-1960 Shop Manual. The DDC transmissions have a casting number that starts with C0NN.
Click to expand...

Casting number on DDC may be C0NN-7006-B or C3NN-7006-B. I think the C3NN is more probable in a retrofit.
 
C0NN prefix on a casting code means that the casting was designed in 1960 and C3NN means that it was designed in 1963. I'm not sure when they did the factory retro-fits, but I thought that it was earlier than 1963.
 
(quoted from post at 05:34:33 11/22/12) C0NN prefix on a casting code means that the casting was designed in 1960 and C3NN means that it was designed in 1963. I'm not sure when they did the factory retro-fits, but I thought that it was earlier than 1963.
Click to expand...

My 1959 971 has the blue transmission, and it also has the diamond shaped brass Ford T&I tag indicating that it went back to Ford for the transmission swap, and was kept there for use at the plant or at a research or testing facility. I think that it is more likely that it was taken back earlier than later.
 
Yeah I found the casting number on the left side of 312259 and no CONN or C3NN numbers, so I believe it has the original trans but the no serial number thing throws me off. I ordered the shop manual recommended and I"m hopeful that it will cover my transmission.
 
(quoted from post at 07:34:33 11/22/12) C0NN prefix on a casting code means that the casting was designed in 1960 and C3NN means that it was designed in 1963. I'm not sure when they did the factory retro-fits, but I thought that it was earlier than 1963.
Click to expand...

I'm not sure when most happened, but know Grandad's 871 had the blue transmission update in 1966. That was my basis for suggesting more of them may be C3NN.
 
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