Magnum 20 Rebuild

This is where we can discuss all the stuff made after IH's sale to MTD.
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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Ok...good idea Mike. U just bought your way back in the sandbox :lol: Maybe i can build a table for the belt sander.
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Well...Kohler said too much time has past to do any kind of warranty. I'm bummed but I completely understand. So I asked Pats if they could sell me a new set for there cost. They almost did. He said he could sell $5 over his cost. So...$58 + $8 shipping I will b back in business. Maybe middle next week. Good thing im not in a rush :oops:
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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Tom Scott
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Re: Magnum 20 Rebuild

Post by Tom Scott »

Dave, sorry you got burned on the rings. In the grand scheme of things, it's not that much money.

Now, more importantly... You started this back in February, lets get this moving along! :lol:
1872, 46", 50C decks, Haban dozer blade, 450 snow blower
2182-1, Kwik-Way Loader, 3-pt & rear pto, 442 tiller
2182-2, 54" deck, 551 snow blower
Past tractors:  1541, 2135
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BigMike
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Re: Magnum 20 Rebuild

Post by BigMike »

Yea, what he said!
Lets get crackin buddy :D
BTW dont ask if my Ford loader project is done.

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Tom Scott
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Re: Magnum 20 Rebuild

Post by Tom Scott »

Yeah, and don't ask about my 551 blower I took apart two years ago either! Just pick up the slack on this engine! :lol:
1872, 46", 50C decks, Haban dozer blade, 450 snow blower
2182-1, Kwik-Way Loader, 3-pt & rear pto, 442 tiller
2182-2, 54" deck, 551 snow blower
Past tractors:  1541, 2135
<><

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BigMike
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Re: Magnum 20 Rebuild

Post by BigMike »

Nothing like a little support from your buddies :lol:

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

U guys r both real turkeys!........but...for some weird reason u r why I keep going. :roll:
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

$8.00 ......FOR THE SLOWEST SHIPPING EVER!!
I ordered a house water heater and got it the next day......what gives :roll:
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Got the new set of rings a week ago. Today was a perfect day to work in the basement as it was about 100° outside. Put the other set on the piston and checked ring end gap....all was good. So on went the cylinders. Now I have to build Mike's belt sander valve grinding clearance machine. I will quick mess with something but if it dont look like it will work I will call the machine shop.....idk. The cylinder bolts call for 200 inch lbs ......but there is no way of getting a socket on them. I just got them real tight with a box wrench. I think Tom will freak out about this idea.
All ready
All ready
IMG_20160813_132735503.jpg (2.49 MiB) Viewed 10372 times
Sealent applied
Sealent applied
IMG_20160813_135624045.jpg (2.94 MiB) Viewed 10372 times
One last check of the pin clips
One last check of the pin clips
IMG_20160813_135908944.jpg (1.76 MiB) Viewed 10372 times
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Well that was easy! I made a simple jig for the end of the bench grinder. My claim to fame was the idea of a two grit wheel. First I covered the whole wheel with heavy gauge 220 paper....but then I got the idea to cut it down to a 4" diameter center with the paper....and leave the outer part uncovered for the stock 60 grit. I started w the course and finished with the fine. Sweet!! I took the clearances to the middle of spec. Not sure what's best but I think as they wear.....they sink and clearance gets tighter. So I would like to open them up a bit more but I really don't know what the heck I'm doing.
Base plate screwed to stock cover screw holes
Base plate screwed to stock cover screw holes
IMG_20160814_115249743_HDR.jpg (3.48 MiB) Viewed 10365 times
A little spray adhesive
A little spray adhesive
IMG_20160814_121250702.jpg (2.45 MiB) Viewed 10365 times
Drilled the guide hole on the drill press
Drilled the guide hole on the drill press
IMG_20160814_123508384.jpg (3.49 MiB) Viewed 10365 times
Finished valve stands on its end
Finished valve stands on its end
IMG_20160814_123904424.jpg (2.99 MiB) Viewed 10365 times
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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BigMike
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Re: Magnum 20 Rebuild

Post by BigMike »

So your saying in public I had a good idea?...SCORE! :mrgreen:

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Hey....i will give credit where credit is due! I tell u what.....i will use the first part of your name....the first part of my name.....and we will add "valve stem grinder"
So...here it is.." Big Dag valve stem grinder" :lol:
I think that's fair...
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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BigMike
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Re: Magnum 20 Rebuild

Post by BigMike »

Wow top billing! :lol:

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Tom Scott
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Re: Magnum 20 Rebuild

Post by Tom Scott »

Although I am freaking out over not using a torque wrench for the cylinder install, and... the less than optimal accuracy on valve tip grinding, you will likely be fine!

There is a lot of tolerance error that can be had between the grinder wheel not being "machinist grade" square compared to the frame you mounted your wood to, the tolerances of your drill press really being square to the wood surfaces you drilled, and however the loose the hole was to the valve.

All that being said, since you spun the valve as you ground it, any inaccuracy would tend to dome the valve tip end, which isn't a disastrous result. And... Since it stands up on a presumably level counter top, it is likely plenty flat enough.

I will also admit that I cannot think of a better way without taking it to a machine shop to be done. Kudos to you for ingenuity.

Now that you have had the unfortunate knock in the temporary engine, time to really get moving on this one! Hope all continues well for you!
:beer:
1872, 46", 50C decks, Haban dozer blade, 450 snow blower
2182-1, Kwik-Way Loader, 3-pt & rear pto, 442 tiller
2182-2, 54" deck, 551 snow blower
Past tractors:  1541, 2135
<><

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Well...Here I am....Back at it! I set a goal for myself back in Aug to finish this by the end of the year....So not much time left :lol:.
I left off on the valve clearance. I decided to open up the gap to the max spec as they only close with time....So...That's what I did a few days ago. Unfortunately I forgot how exactly I made my jig, I had a coarse spot and a fine spot on the jig and I even forgot I did that....So I go to grids a little off and it was the coarse hole. CRAP!! I TOOK TOO MUCH OFF! Spec calls for .006 on the intake....I'm at like .010. Call me a failure...go ahead :oops: I was so bummed. Several people said not a big deal so I kept moving.
Once the valve cover goes on...The valve clearance will be perfect. Lol
Once the valve cover goes on...The valve clearance will be perfect. Lol
IMG_20161230_134042397_HDR.jpg (2.93 MiB) Viewed 10357 times
Heads were trued at the machine shop so they went on fast.
Head gaskets r soft....Bent them getting out of bag
Head gaskets r soft....Bent them getting out of bag
IMG_20161230_134102242_HDR.jpg (3.39 MiB) Viewed 10357 times
Torque to like 25 ft lbs on oiled bolts
Torque to like 25 ft lbs on oiled bolts
IMG_20161230_141242296.jpg (3.75 MiB) Viewed 10357 times
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Eleletric was next. The wires r very "work hardened" not a lot of messing with this.... They kinda found there own route.
IMG_20161230_150714422_HDR.jpg
IMG_20161230_150714422_HDR.jpg (3.21 MiB) Viewed 10360 times
after that the flywheel... they stress the taper on the crank and flywheel must b very clean and free from oil. Anything can cause a crack...Idk.
Oiled bolt to like 40 ft lbs
Oiled bolt to like 40 ft lbs
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127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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BigMike
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Re: Magnum 20 Rebuild

Post by BigMike »

Aren't children born in less time than it has taken to get this built? :geek:

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Mounting the bracket and coil. Set air gap with .014 feeler gauge....Tighten down then remove....It ends up with about .010 air gap
IMG_20161230_163854654.jpg
IMG_20161230_163854654.jpg (2.2 MiB) Viewed 10362 times
I think I did the fuel pump next. I got a new one because I believe the old one was not working....Had to keep tank over half full.
IMG_20161230_165930098_HDR.jpg
IMG_20161230_165930098_HDR.jpg (3.47 MiB) Viewed 10362 times
New pumps r not too bad....Just need snap ring pliers to install hose ends
New pumps r not too bad....Just need snap ring pliers to install hose ends
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127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Valve covers with the new breather plate, filter and hose.
IMG_20161230_193024880_HDR.jpg
IMG_20161230_193024880_HDR.jpg (3.27 MiB) Viewed 10364 times
Oh....And the copper washers
Oh....And the copper washers
IMG_20161230_192207906_HDR.jpg (3.21 MiB) Viewed 10364 times
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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

At this point I felt it was ready to paint the engine. I could not find a happy medium between flat and gloss. I painted the tin this summer w the heat gloss. I did the engine with flat as I was not thrilled with the gloss. I think the two tone with b cool.
IMG_20161231_084537571_HDR.jpg
IMG_20161231_084537571_HDR.jpg (3.28 MiB) Viewed 10366 times
IMG_20161231_090237605_HDR.jpg
IMG_20161231_090237605_HDR.jpg (2.99 MiB) Viewed 10366 times
Painting was tricky in the basement...Fumes??
Painting was tricky in the basement...Fumes??
IMG_20161231_125721750_HDR.jpg (2.84 MiB) Viewed 10366 times
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

So after paint I was able to install the engine on the Cub mounting plate. I wanted to do this now cause once the starter goes on...One bolt is kinda blocked. This would have been hard solo....Two boys helped lift onto the plate while I located a couple bolts
Spacers r all the same
Spacers r all the same
IMG_20161231_134531116_HDR.jpg (3.06 MiB) Viewed 10365 times
New washers and thread lock
New washers and thread lock
IMG_20161231_133830931.jpg (2.06 MiB) Viewed 10365 times
Then the new starter
I wonder how long the plastic nose with last
I wonder how long the plastic nose with last
IMG_20161231_142356576.jpg (1.83 MiB) Viewed 10365 times
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Tin was next... Nothing too exciting here.....Other than one bolt was stripped in one head. Put some locker in there too.
IMG_20161231_222035783_HDR.jpg
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127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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Tom Scott
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Re: Magnum 20 Rebuild

Post by Tom Scott »

dag, Good Job! :beer:
1872, 46", 50C decks, Haban dozer blade, 450 snow blower
2182-1, Kwik-Way Loader, 3-pt & rear pto, 442 tiller
2182-2, 54" deck, 551 snow blower
Past tractors:  1541, 2135
<><

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

BM....Your lucky I didn't notice how u snuck in that little post yesterday. It's a new year....So let's start off on a new foot.
Happy new year....And good luck w the CT..... I hope your rear wheel falls off on the maiden voyage :lol: :lol: :lol:
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

My only agenda today is the mag. Hope to install intake, exhaust and pto. That front muffler tin should go on too. Oh and the oil pressure sensor... Sending unit thing. I was wondering what to use on those threads? Teflon tape looks hard to do..... Permatx gasket maker sounds good. If u remember...I had some trouble drilling out the old fitting. New fitting threads in nice but don't trust it to seal perfect....
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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Tom Scott
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Re: Magnum 20 Rebuild

Post by Tom Scott »

dag - Permatex #3 or #2 is perfect for the pipe thread sealing. Much prefer to teflon tape.
1872, 46", 50C decks, Haban dozer blade, 450 snow blower
2182-1, Kwik-Way Loader, 3-pt & rear pto, 442 tiller
2182-2, 54" deck, 551 snow blower
Past tractors:  1541, 2135
<><

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Bolted the carb on the manifold. I like TL here as the bolts barely stick out and the nuts r thin....and sloppy.
IMG_20161231_224318029_HDR.jpg
IMG_20161231_224318029_HDR.jpg (3.27 MiB) Viewed 10358 times
After bolting down the intake... Hooked up the carb w new fuel line. I set the governor next as u need the carb installed to do this
IMG_20170101_151710006_HDR.jpg
IMG_20170101_151710006_HDR.jpg (3.21 MiB) Viewed 10358 times
Bolted down the air cleaner base. Used Permatx #3 on the threads....So they don't walk out
IMG_20170101_152110445.jpg
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127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

Installed oil sending unit with #3 as Tom suggested
IMG_20170101_150404943.jpg
IMG_20170101_150404943.jpg (1.78 MiB) Viewed 10358 times
Also tighten down the oil filter lines
IMG_20170101_150013647.jpg
IMG_20170101_150013647.jpg (2.35 MiB) Viewed 10358 times
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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dag1450
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Re: Magnum 20 Rebuild

Post by dag1450 »

I could not install the muffler the way it looked....So I got creative with some old paint I found......
Don't do this with the owner of the oven home....lol
Don't do this with the owner of the oven home....lol
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127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

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BigMike
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Re: Magnum 20 Rebuild

Post by BigMike »

Medium rare on my muffler please.
Looks like you are making good progress.....keep at it! :beer:
Oh, and your CT comment, be nice it will be under enough stress as it is :o

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