Progress report on Case 931 pics.

It was a good day to be in a nice warm shop. Ambient temp -7F wind chill -22. We made a lot of progress today. The 931 is sitting on all 4 wheels again tonight. We laid the crank back into the block with all new bearings, installed the flywheel with new clutch disc and new seals etc., and put the timing gear cover back on. After lunch we flipped the block back riteside up and reattached it to the tranny with the cherry picker. Didn't have a clutch allignment tool but a good eye to center the disc did the trick. The tranny cover is off so turning the tranny input shaft and PTO/hyd pump drive to align the splines was easy. Also made it easy to adjust clutch free pedal because we knew exactly where it disingaged.
We then moved on to the task of bolting the front bolster and axel assy back to the front of the engine. When I separated the front axle/nose assy., from the engine, and the engine from the tranny, I welded up a bolt on stand from angle iron to support the tranny and engine when the frontend was removed.
Once we had it back on 4 wheels, we we went back to the top end of the engine. It was dropping coolant into the pan when I bought it. When we got the heads off I had 3 cracked heads and had to find replacements. The replacement heads are currently in the machine shop, along with the rods which are getting new wrist pin bushings.
We dry fitted and clamped the new 1/8" overbore sleeves into the block today to check protrusion as we discovered that there was little to no protrusion on the old sleeves and there were signs of head gasket failure also. We found two of the new sleeves were setting low. Now I need to get some sleeve shims to get them up to .004" protrusion. Need a .005" shim on one sleeve and two .002" on another to make me happy.
I also rebuilt the PTO clutch assy and got the rear of the tractor all buttened up again.
Been doing some more body work on the cab, cutting out rusted spots and welding in patches and had to straighten out the RH rear corner where a tire chain broke and it hooked the cab and bent it and the fender up. That all hammered back into place and doesn't look too bad. A little body filler and it will be hard to detect.
Speer Cushion Co. called Thursday and said they had the seat cores that I sent to them all reapolstered and were shipping them back, plus some padding material for the headliner and interior of the cab.
Still got a long ways to go. I think I will need to spend some time tomarrow morning to put all the tools back into my tool box , sweep the floors and regroup a bit. I'll post another update when more progress is made.
Loren

Excellent work, as usual, Loren. What's your hurry? Can't you slow down a little? You, along with Larry the corner guy, and some others on here tire me out just watching!

Thanks for the update, keep 'em coming! You do good work, and quickly. Definitely jealous of the warm shop today, high of 13F here.

great progress....spent all day in my shop too. LOL

Morning started at 7 above and went down to 5 below thru the day
with a howling wind

Isn't it a bit risky hanging a crankshaft that long from just the ends with no support in the center?

You wouldn't think a crankshaft would bend, but they will. That's why reputable machine shops always stand cranks on end and secured so they don't fall over. I once had a 454 Chevy crankshaft shipped by UPS arrive bent. I had no idea there was a problem until I set the crank in the block and it seemed to bind a bit on one spot while rotating. I bypassed UPS and drove 90 miles to the cranks origin to have it corrected.

hes got me beat by far!!!I dont do much in the winter,,,

Loren your making good progress !!! What is the other tractor in the back ground??? I was trying to figure out the model but I am not that case fluent. LOL

Lots of nice work!

we always used the same procedure on CASE cranks at the shop never had a issue these cranks are a bit stouter than a gas car engine,,, done a few of these in the last 40 plus years
cnt

I want to second what was said more than once. Thanks for taking the time to do all the pictures and explanation. What you are doing is extremely interesting to me. Please continue as you go, especially the cab. I want to redo the cab on my 4320 one day. The metal on mine is good but I want to get it quieter.

Were you able to lift the block with the cherry picker the crank is hanging from? The cherry picker I used to lift a 4 cylinder engine started to peal the metal of the square tube. My sons shaped/wrapped a sleeve and welded it stronger. Mine is rated at 2 ton and I don't think I could lift a 6 cylinder block. Maybe without the heads it's OK.

Paul

Always nice to be in a warm shop on a cold day. Looks good, keep the updates coming.

JD The chasis of the tractor in the background is a 1964 Case 440. the cab, is scratch built, the loader is a Swartz/Oliver that I cut apart and redesigned to fit tight to the tractor frame. I have been working on this tractor for near 20 years. The cab is raised above the tranny with flat floor setting on iso mounts, and all the clutch, brake, and shifting controls are custom built including the loader and all other hyd. controls. I mounted a 30gpm pump on the front of crank to sipply a 4 spool valve and a priority valve for PS. The tractor originally had mechanical steering with power assist. When done it will have hydrostatic steering. All the sheetmetal and 1/2" thick steel nose peice are custom built.
Some of my projects take longer to complete than others. HeHe. I have got to finish it, because absolutely knowone else will ever know how to.
The hood setting on it is off the 931.
Loren

The cherry picker is made by Continental Tool. It is rated at 2 Ton. I have the arm set short to keep it from tipping, but it it is fully capable of lifting a complete engine with heads. I've done it several times. The front casters ar slid pretty well in also.
Loren

Bob, things will slow down a bit now. The machine shop is swamped with work and he told me it would be two weeks or more before he got my heads done. He would try to get the rods done sooner so I could get the pistons into the engine.
If it decides to warm up this coming week we are going to start tapping trees in the sugar bush, and I won't have time to work on the tractor for a while.
Loren

Thanks for the update.I have a 931 and they are a tough tractor for the money.

hi loren great pics of your progress but I was wondering ..I know you said the rods and pistons weren't ready yet but wouldn't it be easier to install them before mounting the block so you could do that standing instead of laying under the tractor to torque?..especially that number one with the oil pump pickup installed looks like a bugger to get to the rod bolts...just wondering..thanks for any insight on that ..always good to learn

Yes it would have been easier to assemble the engine completely and then bolt it to the tranny, but we will be tied up with maple syrup season starting this comming week, and time will become very short. The machine shop is backlogged at least two weeks. There is room to get at the #1 rod bolts.
Got to do what you got to do to keep moveing forward.
Loren

you are correct about that and I would say that in your case timing is very important with all you do ..thanks for the quick response

That is measurable progress, if it continues at that pace it will surely be done with a few more days like you've had. Cool to see it apart and go back together!