Ford 971 Select O Speed

traxtor

Member
Wrapping up my inflame engine rebuild, and started to
get things ready for tank reinstall and roll out of barn.
Went to re-engage traction coupling which was not
latched and could be rotated by hand CW until it stopped
and CCW a full revolution. Note tractor sat for 6 years in
barn motor not running not related to transmission. Since
Ive had it 2007 or so, no issues other than selector did
not line up well with speed number. Tractor will roll and I
pulled it a short distance into barn to do engine work. I
believe traction coupling was properly disengaged.



While getting ready today, I also found the selecto lever
on dash wont move. I have also noticed while running
engine after rebuild that there is a steady seep of fluid
leaking out of SOS top cover.



I have the IT FO-13 manual. Read through that on SOS,
man a lot of info there.



Not sure where to start. My plan when I saw fluid was to
remove top cover and check gasket, but after catching
the traction coupling adjustment as it is I thought Id
remove that inspection plate to look see. After reading
through the manual I decided I needed to research a little
more before starting to pull things apart. I believe tractor
is a 1962 971-5 #160625 gasser. Machine has not been
worked much by me, original owners bought it almost
brand new and last part of its life with then was lived as a
loader machine for manure. Loader is strong and not
powered by a front end PTO drive pump.



Regret such a long description-and thanks fir any insight.
I rebuilt it with the plan for my son to have a reliable
loader tractor at his place. Itll never see 100 hours per
year.



Thanks-
 


If you were to share your location someone here may be able to hook you up with a not too-far-away SOS expert.
 
I know nothing about SOS.

One of my major concerns about the SOS is the older the SOS gets
the fewer SOS experts are around. Not to mention finding parts
for the SOS.

Hope it works out for you..
 
Check the oil in the hydraulic sump and the SOS.

Condensation accumulates in the sumps when things are not serviced regularly. It is not uncommon for the hydraulic tubes in the bottom of the transmission (SOS or otherwise) to fail due to corrosion. When the pressure line becomes perforated, oil is pumped from the hydraulic sump into the transmission resulting in an over-filled condition.
 
That might be a good route-seems a couple things at play and as I read the manual I have, I need shifter in 10th speed to remove top cover. It is
locked in or around the first three positions. Located in Bloomington, IN and my email is in my profile. I try not to put email or phone numbers in
the text of a post.

I appreciate the interest. I'll be looking for an updated IT Manual.
 
If you want someone to email you they cannot see your email in your profile. Only you can see it. YT has a Safe-mail system that does not allow anyone to get your email address until you reply to an email message they have sent you through the safe system. My email is ..open.. as it is often referred to on here. Can you see my email address anywhere? No you cannot, there are just buttons to click in the posts to launch the Safe-mail form. For anyone to be able to email you you need to go to your profile and under ..Preferences.. click ..Alway show my email address.. then your email will be ..open.. but as I said before no one can see your email address. The wording by the check box should really say ..Email, a check here shows I will accept to be contacted by email through the YT Safe-mail system.
 

Gotcha-I ve changed the setting-thanks. I assumed members could see my email if they clicked my profile, automatically but bots etc were restricted.
 
(quoted from post at 05:35:41 03/21/23)
TPD-I appreciate the clarification. My F-20 is heading my way. Thank you-

F-20 not in yet. Went ahead and pulled the inspection cover traction coupler (right side with dipstick). Someone s been there-gobs of silicone goop. I figured first step was to see what the mechanism is that engaged the drive train and maybe trouble shoot why it wouldn t engage with the lever on outside of the inspection cover. Still researching the sensor and wire off of it that connects to inspection plate at a pre drilled hole with rubber grommet. Other end connects to a sensor.

All I can figure is that the lever came out of the coupling groove. Coupling shifts onto rear drive shaft but a little stiff. I m getting back into it tomorrow-dry fit and see how it functions. I can see how getting the hydraulic level back up will help the coupling slide. Level was fine before I drained enough to remove cover.

Checked fluid on right side front housing. Definitely low. Looks like front and back are two separate compartments. I ll get that serviced once I get trunion coupling situated. Hopefully a few pics below may help next person.
 
(quoted from post at 21:48:12 03/24/23)
(quoted from post at 05:35:41 03/21/23)
TPD-I appreciate the clarification. My F-20 is heading my way. Thank you-

F-20 not in yet. Went ahead and pulled the inspection cover traction coupler (right side with dipstick). Someone s been there-gobs of silicone goop. I figured first step was to see what the mechanism is that engaged the drive train and maybe trouble shoot why it wouldn t engage with the lever on outside of the inspection cover. Still researching the sensor and wire off of it that connects to inspection plate at a pre drilled hole with rubber grommet. Other end connects to a sensor.

All I can figure is that the lever came out of the coupling groove. Coupling shifts onto rear drive shaft but a little stiff. I m getting back into it tomorrow-dry fit and see how it functions. I can see how getting the hydraulic level back up will help the coupling slide. Level was fine before I drained enough to remove cover.

Checked fluid on right side front housing. Definitely low. Looks like front and back are two separate compartments. I ll get that serviced once I get trunion coupling situated. Hopefully a few pics below may help next person.
mvphoto103757.jpg


mvphoto103758.jpg
 
(quoted from post at 22:24:32 03/19/23) Wrapping up my inflame engine rebuild, and started to
get things ready for tank reinstall and roll out of barn.
Went to re-engage traction coupling which was not
latched and could be rotated by hand CW until it stopped
and CCW a full revolution. Note tractor sat for 6 years in
barn motor not running not related to transmission. Since
Ive had it 2007 or so, no issues other than selector did
not line up well with speed number. Tractor will roll and I
pulled it a short distance into barn to do engine work. I
believe traction coupling was properly disengaged.



While getting ready today, I also found the selecto lever
on dash wont move. I have also noticed while running
engine after rebuild that there is a steady seep of fluid
leaking out of SOS top cover.



I have the IT FO-13 manual. Read through that on SOS,
man a lot of info there.



Not sure where to start. My plan when I saw fluid was to
remove top cover and check gasket, but after catching
the traction coupling adjustment as it is I thought Id
remove that inspection plate to look see. After reading
through the manual I decided I needed to research a little
more before starting to pull things apart. I believe tractor
is a 1962 971-5 #160625 gasser. Machine has not been
worked much by me, original owners bought it almost
brand new and last part of its life with then was lived as a
loader machine for manure. Loader is strong and not
powered by a front end PTO drive pump.



Regret such a long description-and thanks fir any insight.
I rebuilt it with the plan for my son to have a reliable
loader tractor at his place. Itll never see 100 hours per
year.



Thanks-

Mentioned I was working on traction coupling. Got it working. Drained trans fluid-very filthy. Ordered filter and began removing top cover, but selector is stuck in park (I think). Again, it s never been perfectly aligned to speed. My issue is I cannot move the selector to speed 10. I have F-20 and do not see any way to release. If I cannot get selector in 10 speed, what mess am I in? Other ideas- thank you.
 
Selector freed up-, didnt force, etc. Cover is off-
working on filter can removal. Evidence of moisture in
case. Some rust and more milky trans fluid.
 
(reply to post at 15:34:07 03/26/23)

Update 971 160,xxx: In-frame rebuild is done and the 172 is holding above 40# oil pressure. Temp stays right in the mid-green. Select o speed indicator is pretty well tuned in and shifts smooth. New fluid trans fluid - filter - lower drain screen cleaned. Thanks for the good help up to this point.

I do need assistance with the 540 PTO. It is spinning at a constant low speed. If I manipulate the under cover lever that engages the pto by lifting it up and down by hand with the cover off, there is no change-no stop no speed up. Any thoughts on what is causing this? When I shedded the machine several years ago due to blown head gasket, I was mowing via PTO just fine. I have made no adjustments to the SOS, pump, bands, etc. other than what I have discussed.

Another question, on the lever where the PTO cable threads into the PTO stub beneath the cover, there are two machined holes behind where the cable threads. Should there be a spring(s) attached there? I ran a magnet in the fluid housing and nothing came up, so if something should be there I do not think it broke or fell off. Not sure what those holes are for.

A lot of good experience and knowledge here, and the interest is appreciated.
 
(quoted from post at 06:35:15 06/02/23)
(reply to post at 15:34:07 03/26/23)

Update 971 160,xxx: In-frame rebuild is done and the 172 is holding above 40# oil pressure. Temp stays right in the mid-green. Select o speed indicator is pretty well tuned in and shifts smooth. New fluid trans fluid - filter - lower drain screen cleaned. Thanks for the good help up to this point.

I do need assistance with the 540 PTO. It is spinning at a constant low speed. If I manipulate the under cover lever that engages the pto by lifting it up and down by hand with the cover off, there is no change-no stop no speed up. Any thoughts on what is causing this? When I shedded the machine several years ago due to blown head gasket, I was mowing via PTO just fine. I have made no adjustments to the SOS, pump, bands, etc. other than what I have discussed.

Another question, on the lever where the PTO cable threads into the PTO stub beneath the cover, there are two machined holes behind where the cable threads. Should there be a spring(s) attached there? I ran a magnet in the fluid housing and nothing came up, so if something should be there I do not think it broke or fell off. Not sure what those holes are for.

A lot of good experience and knowledge here, and the interest is appreciated.


It is normal for the PTO to turn when the oil is cold and there is no or little load on the PTO shaft. Jam a 4 ft. 2x4 against to see if it will stop with resistance.
 
Good suggestion Showcrop-thank you. I did test and the 2x4 does not stop the PTO. Moving the lever the cable screws into by hand does not appear to change the PTO speed. I will be getting back under the top cover, I believe, to make an adjustment on the PTO cable. It's a little messy leaving the top cover off and testing the lever, but that seems to be the best way to test its functioning and view the operation.

I doesnt appear the PTO is turning at maximum-maybe I need to hook up a mower and test that. It's not functioning correctly so I hate to go there without knowing why. I don't think those machined holes and possibly missing springs would affect what I am talking about.

Thanks again sir....slowly chipping away on this and pretty happy to this point. PTO is a big deal and do not want to leave it as it is.

This post was edited by traxtor on 06/02/2023 at 11:52 am.
 

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