JD 7600, 7700 7800 lift cylinders

[TrevorJ]

Hi,

I was just wondering if anyone here, has ever had a similar John Deere to fix, and had any issues getting the plate that secures the lift cylinder off. If so, I'd love to hear how was the job was tackled.

I'd actually welcome any suggestions I could pass on, and if it turns out removing the plate has rarely been any issue, then something else might be a factor, like loctite having been applied.

See attached pdf - it is (A) page 2

I have not actually had a hands on look yet, (I'm not sure what model it is) but it's my B-i-L's tractor he bought a few years ago, and he stopped by today after he had a not so eventful day, as the plate would not come off and the allthread he planned to use to extract the hollow pin with, was the wrong (but very close match) thread. (Probably not a good idea anyhow as it would have pushed against a treaded hole in the transmission housing, but the pin is threaded all the way for some reason.) He's also broke the tip off a quality high tensile crow bar trying to pry the plate loose, as well as trying to wedge it but to no avail.

The workshop manual seems to indicate it is a relatedly simple job, however it doesn't specifically what sort of specialised puller would be used. My B-i-L is adamant that a normal standard two legged puller would have paws too large to fit in the small gap and only one side is suitable for single leg to hook into. He also believes that any slide hammer with decent travel to do any good, would also be too long to insert between the wheel and the plate and the wheel would certainly have to come off to use a decent slide hammer there.

He reckoned maybe his next option, though a little concerning, is the red spanner to heat up the plate somewhat, but the concern is the smaller bolt that retains the plate, actually threads completely through the housing into the transmission oil cavity which had just been refilled with new oil.

I would have suggested cooling the pin with dry ice, but being the weekend here, cooling the pin with dry ice won't happen to after the weekend when the only supplier in the district opens.

So I promised him I'd ask here to see if anyone has come across this problem or any suggestions. Could the pin itself be deformed in some manner though it doesn't seem possible?

Thanks in Advance

TrevorJ