685 TA again

I split the tractor on Thursday & found the main clutch gone & fairly oily. The flywheel needs resurfacing & I talked to the local clutch rebuilder & he said he has dealt with a lot of shouldered tractor flywheels & can fix me up. I really can't tell if the oil is from the engine rear main or the T/A so I will do a rear main seal also. Friday I removed the T/A, I haven't got it apart yet but I see some indications of high temperature around the tab slots in the drum. I think a saw a clutch disc & seal set on this website, does anyone have experience with these parts, good or bad? This is the first time I have worked on a hydraulic T/A so I would be grateful for any pointers or advice. Thanks.
Sonny
 
Hi Sonny, just check the torque settings on the rear main seal. My brother's 684 leaked crankcase oil from rear main for years until we replaced the clutch and found the rear main seal studs were loose, re-torqued to spec and it has not leaked since and that was over ten years ago.
Re T/A, my brother put a T/A eliminator kit in his 684 as he no longer used it for chopping corn and did not use T/A much anymore.
Also I was told by an IH mechanic that if your 685 has over 5,00 Hrs and the small hydraulic pump for T/A in the torque tube you should replace it when replacing T/A. Be sure to adjust T/A pressures afterwards.

JimB
 
I have an 884 with TA and have had the TA overhauled several times. It seems like a very short time that the DD side begins to slip. I like to have the TA working, but it's just failing too quickly. Thinking of putting an eliminator kit in this time.
 
Why are they failing so quickly?? My 886 has the original TA in it. Granted, it wasn't used for many years, but it works just like new. I wouldn't be able to have an IH without the TA operational. I reach for that just as often as the gear shift. It's a chore tractor, though.
 
The 884 TA is an altogether different animal from the 886 TA. I have a 766 w/TA (similar to the 886--hydraulic) and a 656 w/TA which is different still (mechanical.) The 884 and similar utility tractors begin to slip in the high mode, whereas the other models begin to slip in the TA mode. The utilities' TA's have locally replaceable parts--clutch pack, bellville washers, etc., while the larger tractors' hydraulic TA's are usually replaced as a complete unit.
Why the 884 TA fails more often, I suppose, may be due to wear on other permanent parts that are not ordinarily replaced in an overhaul. Maybe someone else more familiar than I am with the internal parts could shed more light on it.
 
Hi Cool, just throwing a couple thoughts your way. One the 884 has the most HP of the 74/84 series tractors and could be pushing the designed HP limit of the T/A. IIRC the OPs Manual had a warning about doing a max pull with 884 in 1st Lo, Lo T/A.
Second, maybe the T/A Hi side hydraulic pressure is low or leaking on the overhauled T/As.

Just my 2 cents
JimB
 
Thanks for all the comments. This tractor has at least 6000 hrs according to owners best guess, meter died at 3500, & it may have had T/A repair work done previously. If the T/A hydraulic pumps tend to get weak after 5000 hours or so, I could easily see high side slippage once the oil is warm. I had 300 PSI at the pump, but the oil was only about 45 degrees F. If Kevin sees this perhaps he'll add his opinion as I'll be needing something in the way of parts. Thanks.
Sonny
 

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