Engine rebuild 1949 Cub.

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Flyboy
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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Mon Oct 26, 2015 2:07 pm

staninlowerAL wrote:I asked the same question a few weeks ago and got this reply from Rick Spivey. Maybe this is what you are looking for: "You will need one special tool, the impulse coupling puller. Earl was making them at one time, I strongly suggest purchasing one. I ruined an pulse coupling plate with a jaw puller, and they don't make those anymore." I've not done this before but Rick is highly recommended. Stan


Thanks. I just got a PM from a member offering the use of his tool. How much does Earl want for the tool? I would probably like to buy one at some point. For the short term, I plan on borrowing one.

I have access to a great matchine shop, and if Earl is out of the building impulse puller business, I might be able to build some. I have no idea what one looks like, but would be willing to give it a shot if it isn't too complicated. If someone has a puller, could you post a picture when you have the time.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sun Nov 01, 2015 2:29 pm

Electrical time now. I have seen some YouTube videos on how to verify operation of generators. They say the generator is essentially a motor, and demonstrate how to apply power to the generator to make it run like a motor.

I am at work, and haven't seen the video in a couple days, so I don't remember all the details. Has anyone used this method to check a six volt generator? If so, what do I connect the jumpers to? SN is 55690 so should be positive ground.

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Re: Engine rebuild 1949 Cub.

Postby tmays » Sun Nov 01, 2015 3:06 pm

Here's a pic of mine. Made by farmertan(Mike).
Image
Thomas

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sun Nov 01, 2015 7:35 pm

Mike,
Thanks for the picture. I just got one in the mail from a local member. I am going to make a half dozen as loaners for anyone who needs them.

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Re: Engine rebuild 1949 Cub.

Postby billsfarmallcub » Thu Nov 05, 2015 11:47 pm

I'd like to know how to get the manuals too.

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Re: Engine rebuild 1949 Cub.

Postby staninlowerAL » Fri Nov 06, 2015 7:12 am

billsfarmallcub wrote:I'd like to know how to get the manuals too.

Welcome to the forum. At the top of this page, click on PDF MANUALS and/or Rudi's Manuals then select the tab that will show you what you are looking for. Stan

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:37 pm

This is what the engine looked like when I took the head off. I was hoping for a clean up, put some gas in and go, but that obviously was not in the cards. The project came home on a trailer on August 6th.
Attachments
stuck.jpg
Last edited by Flyboy on Sat Nov 07, 2015 4:38 pm, edited 1 time in total.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:38 pm

Page 2
Attachments
rps20151103_130725.jpg
rps20151103_130725.jpg (23.49 KiB) Viewed 79 times

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:39 pm

This is after removing pistons and wire wheeling to clean it up. Number two was stuck, but came out with some air hammering. A few hours later, the last valve came out.
Attachments
cleanedup.jpg
Last edited by Flyboy on Sat Nov 07, 2015 3:51 pm, edited 1 time in total.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:40 pm

There wasn't enough material to resurface the valve seats, so valve seat inserts had to be installed. Cylinders were bored to .030 over. The shop said that number two had some corrosion above the top piston ring area and probably would not be completely cleaned up even with a .060 over boring, so he stopped there.

The first piston went in extraordinarily easy. There were some difficulties with 2 and 4, but they went in in less than 10 minutes each. I had to trim my Harbor Freight piston ring compression tool down a bit. It was too large for a 2.655 piston. Next came valves/springs. The tool I head to remove them was not at all suited to reinstalling the springs. So yet another delay. I found a tool at the local tool rental place that was designed for larger motors, but did work. It would have been nice to have some help with this process. Three hands would have made the job much faster.
Attachments
pistonsin.jpg
newseats.jpg
Last edited by Flyboy on Sat Nov 07, 2015 4:49 pm, edited 7 times in total.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:42 pm

The reassembly was about a week process. Tappets installed and adjusted. Waiting on head gasket. Then realized I needed an oil pump gasket, so another delay while it was shipped.
Attachments
enginegoingtogether.jpg
Last edited by Flyboy on Sat Nov 07, 2015 3:56 pm, edited 1 time in total.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:43 pm

At this point, I felt like I was finally making some progress.
Attachments
engineonframe.jpg
Last edited by Flyboy on Sat Nov 07, 2015 3:57 pm, edited 1 time in total.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:44 pm

More photos
Attachments
engineonframe2.jpg

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:44 pm

Although the air cleaner was on in this photo, it was premature. It had to come off to revisit some other items that had to be addressed. Once filled with coolant, it decided to have a leak at the front end of the head. So, it had to be taken apart again. This time I used some aircraft grade sealant that my neighbor had. That stuff is great.
Attachments
frontendon.jpg
Last edited by Flyboy on Sat Nov 07, 2015 4:52 pm, edited 2 times in total.

Flyboy
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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Nov 07, 2015 3:47 pm

This is where i am as of a week ago. Carb rebuilt, and tuned up. The Cub 193 plow is on as of a few days ago. Starts in two to three cranks when handstart, and immediately with the starter. Currently, the electrical system is removed. It is started by jumper in with a car battery. The wiring harness arrived today, so the process of connecting everything , and installing the generator will begin when I have some days off.
Attachments
together.jpg
Last edited by Flyboy on Sat Nov 07, 2015 4:54 pm, edited 1 time in total.


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