The shaft is the least of your problems. Mounting the pump up there is the hard part on a J series. I have one that someone along the line replaced the radiator and it's mounting system with one from a U series and put a #44 hydraulic control on it.
On the shaft, I would simply use a double Universal joint shaft unless you can find a stock CAT coupling and shaft. You will have to fabricate a stub shaft on the front of the crankshaft pulley, but I believe any machine shop can take care of that. My 5J parts book shows a couple of bolts in the crankshaft pulley already to hold the locking plate for the big nut, a couple more drilled through there should secure your stub and provide plenty of strength to drive the pump.
I would not recommend u-joints if they are the needle bearing type unless there is an offset (significant) to the shaft. Otherwise the needle bearings don't get a chance to rotate and just brinnel themselves into the shaft or housing. The plain bearing type will work fine.
I would not recommend u-joints if they are the needle bearing type unless there is an offset (significant) to the shaft. Otherwise the needle bearings don't get a chance to rotate and just brinnel themselves into the shaft or housing. The plain bearing type will work fine.
BTW, that is correct. I remember that prob with some of the early 9U's where the engine was too closely lined up with the transmission.
The joint you want (and I'm not talking waccy baccy...) is a Lovejoy-type - a three piece device where two pieces are attached to each side of the connection, and in between them is a slightly flexible piece that transmits the torque while permitting a certain amount of misalignment (like, not much). Google "lovejoy coupling". There is a Lovejoy brand but there are others as well where you can get them very cheap in all sorts of sizes.
The bit I'm not sure about is, can you take a shaft straight out in line with the crank? I though the radiator bottom tank was in the way?
Cheers,
Neil
I'd be inclined to look into a chain coupling w/cover if you have the room.
I've had problems with Lovejoy couplings spitting out the rubber spiders when you get to higher torque applications unless you go to the large models which again may be a space problem.
The rag joint that I think your referring to would probably work, depending on what pump pressure your using.
There is a "service crank" that can be installed on a D2 which means the through hole in the bottom radiator tank is inline with the crankshaft.
Thanks Jeff, that's what I need to get organized for my 3J.
Cheers,
Neil.
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