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alignment help needed--tightening bolts moves the trunnion

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Forum topic by jp90 posted 12-15-2013 05:30 PM 830 views 0 times favorited 6 replies Add to Favorites Watch
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jp90

23 posts in 1199 days


12-15-2013 05:30 PM

I’m trying to align my PM 64A. Using the PALS system, I can get it aligned pretty easily. BUT, when I tighten the trunnion bolts then recheck alignment, it seems to have moved quite a bit. I’ve done it a few times, but maybe I’m doing something wrong. I have one front bolt loosened, and the two rear loose for PALS adjustment. I’ve tried slowly tightening the rear bolts at the same time, but it still moves.

Any tips?

THANKS.


6 replies so far

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Tedstor

1625 posts in 2092 days


#1 posted 12-15-2013 05:41 PM

How loose are the trunion bolts? I left mine pretty snug, loosening them ‘just’ enough to make the adjustements.

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jp90

23 posts in 1199 days


#2 posted 12-15-2013 05:44 PM

i guess the rear ones are pretty loose. the “loose” one in the front is still pretty tight though

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jp90

23 posts in 1199 days


#3 posted 12-15-2013 06:52 PM

In getting the table aligned, I’m near the limit of the PALS in one direction, so maybe I’m pushing the trunnion too far—-then the trunnion is sucked back when I tighten, if that makes sense.

I thought about loosening the front trunnions to start from scratch, hopefully getting the front closer. What I don’t understand is: how can the front trunnions move with the fixed length angle adjusting rod connected?

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skipj

88 posts in 1732 days


#4 posted 12-16-2013 04:42 PM

Try this. Do as you are doing but take the belt off the motor first.

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jp90

23 posts in 1199 days


#5 posted 12-16-2013 04:48 PM

I actually got it late last night and forgot to post. I took the motor off entirely, which made it easier to access and move, but didn’t solve my problem. Finally I loosened the post the cranks the angle adjustment, and that did it. I was able to move the front trunnions more towards center, then adjust from the rear with the PALS.

Thanks for the replies.

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skipj

88 posts in 1732 days


#6 posted 12-16-2013 05:12 PM

Glad you got it. That’s how I had to do it on my 64A.

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