This tractor probably had a heavy operator during a lot of its 50 plus years, the seat hinges and pins
were very worn. I would think it was removed to fix these things. I had good seat parts from a parts D17
and with all new bushings and pins and blasting and painting and new cushions it looks and feels great.
I got this from Matt Scott after an auction
It cleaned up real nice
The hydraulics did not function like they should so I removed the pump
To remove the pump, this spring needs to be compressed and a nail put in this hole
What it looks like after the pump is removed
There are a lot of pieces in the pump. A service manual is necessary for this.
A good cleaning and all new O-rings it now works as it should