A Tandem Cub

[zippy1]

Looks good Frank.
If nothing else, that extra two inches will give you a little extra leg room. Stretch out your legs a tad.

[sawdustdad]

I am so lucky to have a nice warm shop. It was single digits 10 days ago, and we got 8 inches of snow. A week later, it was 70 degrees. Now it's back in the teens and 20s.

Started on the hydraulic pump mount today. I ordered a pair of 4 inch pulleys, one for a 1" shaft, one for a 1/2" shaft (crankshaft and pump).

Looking at the engine crankshaft, the starter pulley/PTO basket takes up a lot of the available shaft. So I bought an extra 7.5 inch pulley in case I'd need to use it in lieu of the starter pulley/PTO basket assembly. Only problem is the belt sizes don't match. I think there is room, just barely, to leave the PTO basket pulley on the crankshaft and still have room for the belt on the new 4 inch pump drive pulley.

Started fabricating the pump mount brackets. Only a little progress on that front.

[jaynjeep]

Looks good!

I don't think it would hurt to trim 1/16 or so off the front of the basket if needed so it won't snag the belt.. it would still be useable with a PTO clutch.. the ears on the clutch disc run fairly deep in the basket.

I envy your cub time lately!!

[sawdustdad]

Originally Posted by jaynjeep

Looks good!

I don't think it would hurt to trim 1/16 or so off the front of the basket if needed so it won't snag the belt.. it would still be useable with a PTO clutch.. the ears on the clutch disc run fairly deep in the basket.

I envy your cub time lately!!

I'm rethinking my plan to run the pump off the front of the engine. I finished fabricating the bracket to hold the pump, got a belt, and then got to thinking about the rear output on the back hydro. Somebody suggested to put the pump there, but at that time, I had the battery there.

Now that I've moved the battery, I think there is room there for the pump now. The install would be much simpler and allow me to put the PTO back on the front of the engine if I wanted to run another implement. Also, because the front mounted pump would hang slightly below the frame, it might be subject to damage if I run over a stump, for example. And, it precludes mounting anything to the QA hitch--a snow plow for example.

So I am going to take some time tonight and look at the best way to mount it behind the rear hydro. I'll have to cut a portion of the bottom of the battery tray out to provide clearance.

As for "cub time" it does help to be retired, I have to say that. Just need to allocate some time for home improvement projects, too. Quartz countertop coming Wednesday for the wet bar that I'm putting in, so I'll be tiling a backsplash later this week, interrupting cub time...

Pics to follow..

[twoton]

Frank, Do I recall you saying that you were putting a cold weather style disconnect clutch on this??

[clay1811/44c]

How much of a load can that front driveshaft take? Not busting a bubble, just thinking. Did Cub's with a rear PTO have anything different on the driveshaft?

[J-Mech]

Originally Posted by clay1811/44c

How much of a load can that front driveshaft take? Not busting a bubble, just thinking. Did Cub's with a rear PTO have anything different on the driveshaft?

The hydro driveshaft is the same size on a tractor with a rear PTO. So.... how much will it take? All the motor can put out. Makes sense doesn't it? I mean, it does drive the rear end. So, it has to be able to handle the entire engine rating.



Frank, now you can direct drive it. Use a piece of angle iron and make a mount. Bolt it on the top of the rear where the PTO block on a SGT goes. Run it direct off the driveshaft. Only trick is making the pump in line with the output shaft of the trans, but that isn't terribly difficult.

[john hall]

Is there enough room to direct drive off the crankshaft with a Lovejoy coupling? I know you'd have to build a bracket for the pump and attach to frame or grill. Wonder also if there would be room for hoses.
Just tossing out ideas, I'm quite enjoying watching this build!

[sawdustdad]

Originally Posted by twoton

Frank, Do I recall you saying that you were putting a cold weather style disconnect clutch on this??

I thought I'd need to until I got a new battery. It cranked over both hydros easily (though they were at 60 degrees F in my shop). If I ever wanted to run this in the winter and the hydros were cold, it might be a problem. If I need to eventually do that, I will, but this is a "just for fun" build, so if I can't use it in the winter, no big deal.

Bottom line, it's not in the plan right now.

[sawdustdad]

I spent an hour or so mounting the hydro pump behind the rear hydro. I machined a sleeve (5/8 ID on one end and 1/2 ID on the other--the pump shaft end) to use to assist in aligning the pump with the hydro output. got it mounted pretty close. Ordered a lovejoy joint from McMaster that will replace this alignment sleeve.

Went back to NAPA today to look for connections to the pump and a belt to match the pulleys I bought for the front mount. I'm making a bit of a pest of myself there lately, it's a small store in a small town (population ~1600 though the surrounding county amounts to ~8000) and they began asking what I was working on. I explained a bit about the project, they asked for pictures. Nice guys working there.

Here's a pic of the rear mounted pump with the alignment sleeve still in place. It's actually a cozy fit but there is room for the connections I think.

I'm liking this location as it is hidden and allows continued use of the QA hitch and front PTO if desired.

I looked at the spool valve and it's a little larger than I imagined. Kind of clunky. Trying to figure out where to mount it. I'd like to mount it like the Cub Cadet lift spool valve is mounted under the dash. Will have to look at a way to do something similar.