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More 9600 questions for Bern or anyone else who knows

L

Larry NCKS

Well-known Member
This is my brother's sons' tractor. It's developed quite a noise, I'd call more like a buzz or raspy hum, somewhere between the flywheel and the final drive.

Just a few observations from one who has little to no acquaintance with Ford or NH tractors built between 1964 and 1994

1. This tractor is not equipped with dual power.
2. Loading the hydraulic system exacerbates the noise.
3. Changing the clutch pedal position alters the noise, but it sometimes makes it worse when engaged and sometimes when disengaged.
4. I had the nephew drive the tractor a little over a mile to get it from the field into the yard. He claims the noise disappears in 8th gear at road speed.
5. We did change both hydraulic filters.
6. I noticed the appearance of the presence of moisture in the center housing oil. I'm assuming transmission, hydraulics and final drive are all a common sump on this tractor???

Some questions then.

1. I have an 8000 service manual. Is the 9600 transmission and hydraulics similar?
2. Is there any fairly common cause for this complaint?
3. Am I wrong to figure they're looking at a front split as a bare minimum?

Thanks!
 

How about engaging-disengaging PTO, and how do the hydraulics work? The basic difference between the 8000 and 9600 is the turbo. Something else that can enter this picture is the type of transmission lubrication. The 8000 could be splash lubricated while the 9600 is most likely to be pressure.
 
My first guess would be that it has stripped out the splines for the internal PTO drive shaft - these splines are located in the engine
flywheel. Easiest way to tell would be to see if the PTO powers a load. It's not good enough to simply see if the shaft spins in the back -
get it under a load that would make the engine at least grunt a little. If the PTO does not drive (assuming it did prior), then that's your
answer.

In that case, you'd be looking at a double split, both in front of and behind the transmission. The front split allows you to replace the hub
in the flywheel, and the rear split allows you to replace the shaft, as it has to come out the rear of the trans.

Yes, 8000 & 9600 hydraulics are essentially the same. The main difference is that later 9600s added an external suction hydraulic filter. And
yes, a 9600 would be common sump. The rear PTO box is separate though.
 

Haven't found access to anything that would pull that heavy yet. I'm wondering whether there might be a dynamometer close they could take it to.
 
Larry gear was he baling in, the reason I ask is I run an 8000 baling in 3rd. An 8000 is not a common sump. If the oil level gets low, bushings in the gear you stay in the most gets dry. When do something in another gear for say an hour or 2, that bushing begins sq/ buzz. BTDT now take 1/4" pipe plug out transmission on right side under the speed selector arm. That's where oil level should be in trans. Those tran's are tough just don't speed shift. PS in 69 an 8000 was driven 10 miles with no oil in trans, filled and it worked hard 4-500 hours a year till 83 and broke a tooth off 1st gear.
 
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