Hi everyone! This is my first post here but thought you guys would appreciate my current project more than is likely on the brand specific forums.
This fall I bought a '79 Case 646 loader. It is original paint, original hydraulic hoses, and was original tires still, but I had to replace the rears. It does have the holding valve and the rear PTO valve, but no 3 point hitch. I have the materials to build a 3ph and have built one already for my Case 444. Anyway, the 646 is powered by the original Onan CCKA 16.5 hp engine. I have never been a fan of Onans so I have no qualms with yanking a good running one out. Through some horse trading I ended up with a new Carrol Stream 10hp diesel but felt it would be a little underpowered for the Case. Then I stumbled on a Kubota Z482-E 2 cylinder diesel that came with a bell housing that was once used to mount a hydraulic pump. This engine is rated at 13.3 hp and runs at 3600 rpm so it will replace the Onan nicely. Torque is rated at 22 ft/lbs, roughly the same as the Onan. I was able to trade the china diesel for the Kubota plus cash! I also have a Kubota D722 but it is too long to fit in the Case.
My plan is to install the 482 without making any permenant mods to the tractor. It sat long enough that the fuel in the injection pump turned to wax, so one plunger was stuck. I found a cheap new in box replacement so I have been playing with the old one until it arrives. I removed the pump from the engine and soaked it in Power Service fuel additive for 4 days, then laquar thinner for one day. Then I tried rubbing alcohol and it almost immediatly began to dissolve the wax! after soaking for about 3 hours I had the plunger freed up. I am now working to clean all the loosened wax out of the pump body. Turns out these pumps are very simple to dismantle to clean, just don't remove the security torqx screws that hold the part the nozzles screw into. The position of those flanges adjust the fuel deliverly to each cylinder.
I am probably a couple weeks away from actually starting the installation, but thought I would thorw it out there. I have a large lathe, mill, multiple welders, plasma cutter, etc, so everything will be done in house. The PO of the engine cut the pump mouning flange off the bellhousing (why???) with an angle grinder, so i will have to weld a new piece of aluminum in it and machine a new pump mount. That is really the biggest hurdle I see so far.