The last post was about the 3 point lift not working on my 72 Ford tractor and the 3 point lift top cover conversion. The installed hydraulic motor was dismantled and a conversion parts kit was ordered. Below you will find all used parts of the pump.
The new parts arrived a week later with new swash shaft, seal, gears, bearings, race, seals and various springs, ball bearings, roller bearings and brackets.
I really wanted to reassemble the pump and forgot to take a photo of the assembly. The most difficult part was removing the needle bearing, seal and race, which are located in the same housing that houses the drive wheels. It is an important part because the swash shaft is mounted there and the seal prevents the engine oil from penetrating into the hydraulic oil. The driver tool ordered with the parts fitted onto the caged roller bearing which was intended to drive the bearing, seal and race out of the housing. The cage bearing and seal were driven out in parts, but the race did not move. The race had to be cut in two places with a Dremel cutting wheel to get it out without damaging the housing.
The rest of the assembly was pretty easy if you watched the pump and top cover rebuild video at farmtractorrepair.com, also called J&D Productions. I also ordered all the parts needed to rebuild the top cover and pump from there. The pump was cleaned before installation and then painted.
Once the pump was installed, the hydraulic system was primed using air pressure in the rear housing to force the oil to the pump. With the system primed and the tractor running I tried to raise the scraper box with the three point but it failed but the two hydraulic cylinders on the back worked so I knew the pump was working. When I operated the raise/lower control it felt like it wasn’t connected to the internal connection in the rear case. So I took the top cover apart again.
The lift piston assembly has been removed and you can see the linkage connected to the lift control. I couldn’t find anything wrong with the shortcut.
The control linkage is the upper lift/lower linkage and the large linkage is the piston lift/lower main lift linkage connected to the two lift arms.
