David,
Can't answer all of your questions, but will try and answer a few... I bought a 180 myself back in Feb., that sounds much like yours. Only I needed to replace the brakes and rear seals. After being around IH's all of my life, got to tell you, I would rather work on an IH anytime..!! Especially after having to pull the rear axle housings, to replace dry disc brakes... Makes you wonder what the engineer's were thinking..
As far as the manuals. A factory service manual is hard to beat. I&T's leave a lot of items out... I believe it is "Yesterday's Tractor" site has reprints of the original Massey Service manual. They are not cheap..!! I got both the service, and parts manual with mine. And they are the reprints I was talking about. Bad thing is, it is not in order, section wise... A good snowy day job, to put sections where they should be.
I bought an operator's manual on ebay. I used the "saved search" feature, to find mine. Most ask about $20.00 + for theirs. One was put on there "buy it now" for like 10 bucks. I jumped right on that one!!
Seat assembly's can be bought from aftermarket part companies. There are also some on ebay. Depends on how much you want to spend. But if you're going to spend hours on that tractor, I'd sugest getting one at least semi-comfy...
As far as not wanting to shift out of first gear. Is this the only gear it does that in..?? My first thought would be that the clutch is dragging. Maybe a simple adjustment. Or maybe a finger, or springs broken in the pressure plate. Warped clutch plate, or oil soaked, and somewhat swelled...
Mine does have dual remotes on it. You may be able to go to AGCO Parts Books, and find the part number for the extra remote. Here is the link to that site.
AGCO Parts Books
Enter as a guest user, and click on "view books". When the next page opens, type in your model number (180) and brand. It will open to a page with parts listed by section. ie: engine, brakes, hydraulics, etc. Click on the section you care to look at. It will give an exploded view of that section of tractor. Below will be the part # and description.
If you know how to "copy and paste", it is pretty easy to search for aftermarket parts. Simply copy and paste the part number. I usually have Google up and ready in another window. I just paste the part number in the search window. Many results usually appear, and you can just shop for the best price. Many online dealers of aftermarket parts, list their part as a replacement for said part number...
I had the same problem with the
PTO on mine, and still do, plus more problems. I assumed it was the brake on the Independent
PTO was just well worn enough to not stop the shaft. I took a 2X4, and pried down trying to stop it.. Nope, couldn't do it. Finally had a chance to put it on the bush hog a couple weeks ago, and play a while. I shut it off, to hook the
PTO up. And sure enough, the mower ran slowly. No problem, if that's all it does. Went in the pasture to clip some high places the horses left. Engaged the
PTO. The bush hog sped up... A good sign.!! Went about 5', and it stopped turning... Big disappointment..!!
Either the valve in the aux.
hyd. pump is stuck that engages the IPTO (according to the troubleshooting guide in the repair manual) or the clutches, and brake are shot... The bad thing is, the tractor will have to be split, to remedy that problem. Right now, don't have the time... I need to build a set of splitting stands, before even thinking of starting on that. So that project has moved to way back on one of the back burners...
The pedal you mentioned is the differential lock pedal.
And being able to push down on the lift arms when it is running can be done, if the control lever for the arms is pushed down. It should only allow you to push it down as far as the holding position you stopped it at. If it is still in the full lift position, and you can push them down, you definitely have a problem..!! That would either have to be in the control valve, or the rings on the lift piston.
I too am having problems with my power steering. Mine has the Saginaw Hydramotor. Yours may be new enough to have the Char-lynn orbital motor. You'll just have to check in the AGCO Parts Book for the serial number break. Or take a look underneath the dash, then check out the power steering types on the parts page. They are easy to tell apart, once you look at yours.
I have a thread started on my power steering problems on the second page of the Massey owning/operating. Pretty well goes into the detail of my problem. Pretty lengthy to type it all out again, if you care to look.
My problem is not the power steering pump, and I hope it isn't yours either. My nearest dealer told me over the phone, the pumps aren't the best candidate for a rebuild. The aluminum housing wears, and allows pressure to go around the gears, and blow the seal. And new repalcement
PS pumps are over $500.00 from Massey. Aftermarket one's can be found for less money. I tore mine down, figuring I didn't have much to loose. Luckily, I found the large O-ring around the case had been mashed, and a small section missing. For $10.00 worth of O-rings, and seal, mine has plenty of pressure. Enough to open the by-pass valve when turned full left or right. I do believe my problem lies in the Hydramotor. I haven't had time to check and see if these units had an update kit, to replace it with a Char-lynn orbital motor as of yet. Or, checked with my local hydraulic rebuild shop to see if he could rebuild this unit. I do know they are like hens teeth...
Hope this helped you a little... I'll try and keep you updated on any progress I make.