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wd45 offset piston pins


 
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jrm1
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Joined: 18 Jan 2012
Posts: 5
Location: claremore, oklahoma

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PostPosted: Tue Jan 31, 2012 11:35 am    Post subject: wd45 offset piston pins Reply to specific post Reply with quote

I am installing new ai pistons on my old 45 rods. I have the allis chalmers wd - wd45 service manual. I have read section on offset 1&3 and 2&4. The books states rod against boss and pin flush with skirt. My old stock piston are set up rod against boss and pin flush with outside of boss bore. The old pistons were offset correct and not rubbing liner. Can someone give me their thoughts on this set up.
 
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Rich in IN
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PostPosted: Tue Jan 31, 2012 12:38 pm    Post subject: Re: wd45 offset piston pins Reply to specific post Reply with quote

With rod against boss and pin flush with skirt, lock bolt. When installed rod end will be away slightly from boss moving pin closer to center.
 
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bjb in TX from Ne
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Joined: 18 Mar 2009
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PostPosted: Tue Jan 31, 2012 12:45 pm    Post subject: Re: wd45 offset piston pins Reply to specific post Reply with quote

When I did my WC (same instructions) I followed the manual. The important thing is when you get the pin in the right location and move the rod back and forth between the bosses the pin doesn't protrude. The rod is actually held centered by the crank. The pin should be approximately centered too if following the directions.
 
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mikeintn
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Joined: 08 Jan 2008
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PostPosted: Wed Feb 01, 2012 5:44 pm    Post subject: Re: wd45 offset piston pins Reply to specific post Reply with quote

I just did my WC and I put the the piston and rod in without the rings and then hold the rod on the crank tight, then check the gap you have between the rod and piston boss, then take it back out, set it back to the same gap, then center the pin in the piston, just make sure you keep the pistons marked front and numbered so they go back right. Mike
 
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