R.O.C.K Restoration Project

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rockfarmer
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Re: R.O.C.K Restoration Project

Postby rockfarmer » Wed Aug 30, 2017 7:05 pm

I repeated the wet test on #2 cylinder,

# 2 Cylinder wet compression test.jpg

..after I noticed a small puddle of oil on the floor. Traced it to #2 exhaust port. I presume the exhaust valve was open while adding oil or too much was added.

There was a slight improvement, from 50 to 60 psi, but based on what I have read, the numbers are still too low... aren't they?

This is the first time I have run a compression test on an engine, maybe I'm not doing it correctly, or, it just needs new rings.

Anyway, It is probably going on a road trip to Thrall, TX tomorrow. Machine shop. Let them evaluate it.

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rockfarmer
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Re: R.O.C.K Restoration Project

Postby rockfarmer » Wed Aug 30, 2017 11:39 pm

Chipmaker wrote:
rockfarmer wrote:Do you think the head will be OK?

Look at the casting dates on the head and the block, if they are way different then the head may have been replaced when the freeze happened. With the block and the front bolster both being repaired I wouldn't think those were the only 2 places it froze and busted but I could be wrong.


I don't see any other repairs or cracks, yet. The head casting is 1-14-C

staninlowerAL
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Re: R.O.C.K Restoration Project

Postby staninlowerAL » Thu Aug 31, 2017 6:39 am

TM casting code table shows "C" as '57 or '79. There should be a part # to tell the difference.

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Re: R.O.C.K Restoration Project

Postby rockfarmer » Thu Aug 31, 2017 12:30 pm

Part # 251228 R1 F 2

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Re: R.O.C.K Restoration Project

Postby Glen » Thu Aug 31, 2017 4:35 pm

Hi,
You could look at the engine serial number, you probably know where it is, to the rear of the carburetor, stamped in the engine block. And look at the block part number and casting date, below the carb. The whole engine could have been replaced, or just the head.

In your pic above, it looks like the high speed limit bolt, on the governor is screwed down all the way, it probably needs to be backed out so the throttle can open.
Also, the stop on the throttle arm is not in line with the end of the bolt, unless it is just the pic making it look that way. Something probably needs fixing there. Maybe the arm needs to go on the shaft farther.

I would oil the shaft and arm while it is easy to get to, so it turns easily, they commonly get tight there from no oil.

Below is a pic from TM Tractor, of how they should fit, and the bolt usually has to be about in this position, if it is the original length bolt. :)
Attachments
Cub gov 8.jpg
Last edited by Glen on Fri Sep 01, 2017 12:45 am, edited 1 time in total.

staninlowerAL
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Re: R.O.C.K Restoration Project

Postby staninlowerAL » Thu Aug 31, 2017 5:23 pm

Here's the page from ENG 1 REV 20 12-75 detailing the head applications:
head.jpg
Looks like Engine SN 312589 and below used head PN 251 221 R1 and Engine SN 312590 as well as Number series LOBOY used head PN 355 691 R2. Part of the increased HP change.

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Re: R.O.C.K Restoration Project

Postby rockfarmer » Thu Aug 31, 2017 6:14 pm

Engine serial number is 80322
Block ID 251341 R2
6-10-S
Exhaust valve - 251 261 R1

Wiped with acetone
49 Cub Block wiped.jpg

Look original?
Piston 49 Cub.jpg


I noticed a small crack at #4 and #3 cylinder where the head bolt and triangular shaped coolant port meet, which, coincidentally is located next to the JB Weld we found.

I think we should probably replace this one. Never know, I might be the highest bidder :D

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Re: R.O.C.K Restoration Project

Postby Glen » Fri Sep 01, 2017 1:01 am

Hi,

S is the code for 1949, so the block was made on June 10, 1949. Maybe you already knew that. :)

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Re: R.O.C.K Restoration Project

Postby rockfarmer » Fri Sep 01, 2017 12:36 pm

Glen wrote:Hi,

S is the code for 1949, so the block was made on June 10, 1949. Maybe you already knew that. :)




So, Glen, based on your information, in keeping as close to the "original" theme as possible, we need to replace the block with an S code.

Well, a few days ago, we were offered a free block with an S on it by one of our members. I'm not going to mention his name without permission first, but he lives in the great state of Alabama :hattip:

Also, we just received a brand new;
49 Grill.jpg

Sure does make the rest of Rocky (our tractor) look bad!

Thanks Chipmaker!

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Re: R.O.C.K Restoration Project

Postby Glen » Fri Sep 01, 2017 3:14 pm

Hi,
I got the date info from TM Tractor, here are the 2 pages with info about casting codes.

http://www.tmtractor.com/id/castdate_loc.htm

http://www.tmtractor.com/id/id_004.htm

Some people weld cracked cast iron blocks, I think, and they seem to work. :)

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Re: R.O.C.K Restoration Project

Postby rockfarmer » Wed Sep 06, 2017 11:00 am

Rocky has a health care appointment in CO this weekend. I want to give him some company on the trip so I will be hauling 2 tractors.

I have a 7' X 18' trailer with a 2 foot dove tail. Any suggestions on how I should I safely load them?

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Re: R.O.C.K Restoration Project

Postby Bob McCarty » Wed Sep 06, 2017 3:37 pm

With rear weights on the project tractor, I think you could load it either direction and have good tongue weight. Center the second over the wheels, or in front of the dovetail and make sure both are strapped/chained down well. If the front of the truck feels light you can always reposition. See you tomorrow.
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rockfarmer
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Re: R.O.C.K Restoration Project

Postby rockfarmer » Tue Sep 12, 2017 9:46 pm

Rocky's transmission surgery went well this weekend at the Rocky Mountain Cub Fest. It happened so fast that if it were not for someones "encouragement" to keep taking pictures, I would not be able to share this experience with you all.....thanks Dale!

Doc recommended he shed a few extra pounds before surgery...
Rocky preparing for surgery.jpg


IV started...
Rocky IV setup.jpg


performing the rear section split,
49 Tranny removal.jpg


removing Transmission and Differential,
Tranny removal 49.jpg


2 over sized bolts holding the left side final were removed.
Removing striped bolts tranny 49.jpg


and then this. Now this, was worth the trip alone: We removed the right side retainer first, being extremely careful not to bend or ding any shims, then, using a brass drift, tapped the left retainer out from the inside :worthy: :worthy: :worthy:

i was in :shock: and awe and missed the next 10 minutes of surgery.

Next thing I knew, Rocky was heli-coiled back to 3/8" and ready for new bearings,

Helicoil 49.jpg

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rockfarmer
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Re: R.O.C.K Restoration Project

Postby rockfarmer » Tue Sep 12, 2017 9:50 pm

All while 3 or 4 other projects were going on
RMCF Busy Bees.jpg

at the same time.

This was my first Cub Fest and it did not disappoint.

:hattip: to the originator(s) of these events, and a special thanks to Bob and Sue McCarty for their warm hospitality!

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Re: R.O.C.K Restoration Project

Postby Barnyard » Tue Sep 12, 2017 10:00 pm

Tim, I'm glad I got to meet you. Maybe someday we can get you to Ohio.
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