pulling motor on OC3

[Gazer61]

I want to remove the motor on my OC3, but it is out in a field(not to mention 10 miles away from my home) and is going to be hard to get to. Can anyone give me a heads up on where to start. Should i take motor and transmission as a unit,and if so are there any mounts on the transmission that need to be removed. Also I need to know if the front motor mounts can be unbolted from the motor or will i be forced to deal with the large nuts  that go through the bushing assembly.any help will be greatly appreciated

[550DarrinWI]

It isn't that bad to pull the OC-3 engine if you have a hoist and a flat surface. . .I'm guessing your field isn't all that flat.

You can leave the front engine mounts behind and deal with them in the spring.  Disconnect the drive shaft at the clutch housing.  There are four bolts per side in the rear and two bolts per side on the front of the engine.  I believe you just need a 9/16 wrench for the front and two 5/8 wrenches for the back.

My biggest problem was the back mounting pads were badly rusted to the the frame and when she came out - she came out with a jolt.

Pull the engine, flywheel and clutch all at once and take her home.

good luck.

[Gazer61]

Thanks for a quick reply, I was hoping that it would be a relatively  simple operation. I didn't look forward to wrestling with that large nut with out power tools.  I am planning on attempting this on Saturday. The tractor has been sitting for 30+ years so I am sure that I will have my share of rusted bolts.The good thing is that the drive shaft, hood and gas tank are already in my garage. The Radiator is in my basement, already repaired and painted. The motor is the next step. I will let you know how I make out.

[Gazer61]

I went over to the tractor today in an attempt to locate the bolts.I crawled under the tractor to scope the situation out.  I was able to find the 4 motor bolts,but was unable to find the 8 transmission bolts.Do the transmission bolts come in from the bottom or the side?   This tractor has an Anderson loader support strapped to the side of the frame. Is it possible that the loader support is covering up the transmission bolts on the side?

[Gazer61]

Sorry! I keep using the term transmission when what I really mean is bell housing

[Gazer61]

After asking around, I realized that the the  bell housing bolts come in from the side of the frame. When I went over to pull the motor I realized why I was having a hard time finding out how this motor was being held in. All of the 8 bolts had fallen out !! The only thing holding the motor in were the front     motor mounts. The good news is that I didn't have to worry about rusted bolts.   I now have the motor in my garage awaiting the tear down and what ever surprises that might bring.

[Eric Carlson]

That's about the only time I'd be happy about missing bolts!
My OC-46 had missing and broken bolts all over

Good luck with the motor,
Eric

[Gazer61]

Hi just thought that i would give an update on the motor rebuild. My assumption that all the bolts in the bell housing had fallen out was not completely true.After I got it cleaned up, it turns out that 5 out of the eight had been sheared off before they had fallen out. So after hearing all the stories of rusted bolts, I will probably have to drill them out unless someone has an easier idea.

[Eric Carlson]

I have had good luck with welding a nut onto the broken bolt. I use a nut that's one size larger than the bolt. I hold it with a leather glove, tack it, then fill the nut with weld. Make sure you get a good bite on the bolt shank with the weld. After that, I try to loosen then tighten the bolt slightly. If it moves, I'll keep wiggling back and forth until I can unscrew it. A little bit of penetrant helps too. If the nut breaks off just weld on another one. The heating and cooling also helps loosen the bolt. I've done quite a few where I had to weld more than one nut onto the broken bolt.
Hope this helps,
Eric

[Gazer61]

thanks
I forgot about that trick, I used it to get some bolts out of my frame.The only thing that will give me problems is that the bolts are broken off below the surface a little bit. I have a while before i will get to the bell housing so I have it setting in the corner soaking in penetrating oil. I will try that in a couple of months.

[BoB-O]

Hi,
All the advice others have given you is excellent.  The only thing I do different is to use a small rod at a high amperage.  Like a 1/16" rod at 90 amps or an 1/8" rod at 135 amps.  I've done this many times and it works good.
BoB-O

[Eric Carlson]

BoB-O,
I'll give the smaller rod a try next time, thanks.
Eric