Piston rod bolts and placement

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Piston rod bolts and placement

Postby pett3227b » Wed Apr 27, 2022 12:44 pm

I am about to start bolting my cub engine back together. I was wondering if anyone knows which way the two halves of the piston rod pieces go together? I am talking about the part where the rod bearings go into. The bottom end of the piston rods have two bolts that could be turned either way. One side is however stamped with the number of each piston. The upper half of the pistons are also stamped with the same numbers. So when I put the bottom half on are the numbers on the same side or does the lower half have the number on the other side? Thank-you

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Re: Piston rod bolts and placement

Postby SamsFarm » Wed Apr 27, 2022 1:24 pm

The Cub service manual is in the pdf manual section.

It should answer your questons without opinions!

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Re: Piston rod bolts and placement

Postby Bill V in Md » Wed Apr 27, 2022 3:03 pm

The stamped numbers on the piston and piston rod should be on the same side (camshaft side), per paragraph 2 of the Blue Ribbon Engine Service Manual, GSS-1007 (see below).
GSS-1007 Engine pg6.pdf
(413.41 KiB) Downloaded 56 times
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Re: Piston rod bolts and placement

Postby ricky racer » Wed Apr 27, 2022 3:29 pm

Bill has you covered. Connecting rods are always match marked. The numbers are always matched (numbers matching) and the numbers are always on the same side of the rod.
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Re: Piston rod bolts and placement

Postby Glen » Wed Apr 27, 2022 6:55 pm

Below is the Cub and LoBoy service manual, it has lots of info.
I would read the engine section, section 1, before working on the engine.
There is a contents beginning on page 1 of most sections, that makes it easier to use online.

http://farmallcub.com/rudi_cub/www.clea ... index.html

You didn't say the year of the Cub. This manual was made in the 1970's so it has newer, 12 volt electrical system info. :)

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