(800) 853-2651
SHOP NOW

Ford 971 SOS problem

D

davh55

Member
Have a 1962 Ford 971 that has been used occasionally and shifting was always good. Backed it off my trailer and parked it. A few days later started the tractor and would not move. When I put it in either reverse it would lug the engine and did not seem to lug much when I put it in any forward gear except 10th. Then it would work the engine some. Oil is full and all other hydraulics work fine. Any thoughts? thx davh
 
Wherever your tractor is. LOL

Seriously, the SOS transmission level/fill plug is a pipe plug located slightly to the front of and below the footboard.
 
(quoted from post at 08:40:29 03/19/19)
I will check on right side. lol Thx. Dave
Click to expand...

Was about quart and 1/2 low but still does not want to move. It pulls motor down in both the reverse gear select spots. Does not seem to pull engine down in forward gears except 10th where it pulls engine down some. What should I check first?
 
I have a 1959 871 and need recommendations on the best transmission fluids to use. It would help me if the recommendations included a tractor supply product, brand name carried widely, or a New Holland number. My sincere thanks to all the experts who support hobbiests like me by sharing their knowledge.

Thanks,
Jeff
Boonville Indiana
 
(quoted from post at 08:40:24 03/25/19)
Was about quart and 1/2 low but still does not want to move. It pulls motor down in both the reverse gear select spots. Does not seem to pull engine down in forward gears except 10th where it pulls engine down some. What should I check first?
Click to expand...

I'm going to guess that you've got some valves hung in the control body. But that's only a guess from a distance.
 

Just surprises me that it has been working and I just backed it off the trailer and parked it and then it wouldn't move. Is this a major issue to check the sticking valves?
 

Well, I'm baffled too. I have an 871 and it's never done anything like that to me. Here's a suggestion though. If it were my tractor, the first thing I'd do would be to use the traction disconnect (by your left heel, right next to the transmission dipstick, which will allow you to roll the tractor around. On a long shot, it might be worth seeing if the transmission can run through it's gears while disconnected from the ring and pinion. If it STILL loads up while disconnected, you KNOW the problem is with the transmission.

If, by chance it DOES seem to work freely, I guess you'd have to sort out what happened with the rear end/brakes/wheel bearings, etc. Keep us posted, please.
 
(quoted from post at 12:19:52 03/25/19)
Just surprises me that it has been working and I just backed it off the trailer and parked it and then it wouldn't move. Is this a major issue to check the sticking valves?
Click to expand...

That's what makes me think it's control valve issue. You've got to know proper control cable R&R procedure and then remove the top cover.
 
(quoted from post at 10:53:47 03/25/19)
(quoted from post at 12:19:52 03/25/19)
Just surprises me that it has been working and I just backed it off the trailer and parked it and then it wouldn't move. Is this a major issue to check the sticking valves?
Click to expand...

That's what makes me think it's control valve issue. You've got to know proper control cable R&R procedure and then remove the top cover.
Click to expand...

Still haven't been able to get the 971 to move. When I checked the valve on the left side to disengage the rear end from the transmission it was already free and you could roll the tractor back and forth. Doesn't seem to engage when I try and move the selector. This mean anything to anyone?
 
"When I checked the valve on the left side to disengage the rear end from the transmission it was already free and you could roll the tractor back and forth."

The traction coupling is behind the side cover with the dipstick - not a 'valve', but a sliding coupling that is physically moved by the lever that should be nutted on one of the cover studs.

If you can roll the tractor around then this coupling has disengaged and it should be a relatively simple matter to get it re-engaged.

Do you have the I&T manual? It gives instructions with illustrations.
 
(quoted from post at 16:07:09 04/15/19) When I checked the valve on the left side to disengage the rear end from the transmission it was already free and you could roll the tractor back and forth. Doesn't seem to engage when I try and move the selector. This mean anything to anyone?
Click to expand...

Yes! It most certainly does!

It's not a valve. It's an eccentric that engages a grove in a coupler sleeve. If one turns it to far or puts the coupler sleeve in backwards, it'd be really easy for the two of them to part company. Then the sleeve can go where it wants . . . and mostly it wants to be in the disengaged position.


Reckon with what you've now said, I'd be pulling that round cover and taking a gander inside. Please note: if your hydraulics are full, you'll lose some fluid doing this on the level.
 

Makes more sense now. I have moved the side lever before with no results. Seemed like maybe something was not releasing. Probably had it in release mode and it released during this last episode. Thanks, I will pull the plate and check things out. Dave
 
(quoted from post at 05:04:16 04/16/19)
Makes more sense now. I have moved the side lever before with no results. Seemed like maybe something was not releasing. Probably had it in release mode and it released during this last episode. Thanks, I will pull the plate and check things out. Dave
Click to expand...

Pulled the side plate and was happy to see the coupler had disconnected from the lever. Moved the coupler and lever back to the grove and bolted plate back on. The SOS works great. Thanks for all the suggestions from all, this forum is great!! Dave
 
You must log in or register to reply here.

Similar threads

G
Help Ford 3000 sos
Replies
12
Views
350
Georoland
G
K
Will a Ford 861, 5-Speed Fit In A Ford 971 Tractor
Replies
14
Views
699
Husker 50 8n
H
T
SOS 971 160xxx S/N finding Park
Replies
5
Views
403
showcrop
showcrop
D
971 sos
Replies
5
Views
581
Sean in PA
S
D
Ford 4600 fwd transfer box issue
Replies
18
Views
809
DavyH
D
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top