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Forum topic by dgrant posted 09-14-2013 12:35 PM 745 views 0 times favorited 11 replies Add to Favorites Watch
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dgrant

29 posts in 403 days


09-14-2013 12:35 PM

Greetings. I have been looking over this site for a long time but finally joined today hoping I can get a question answered. I have a new GO 713 table saw. The same as the 715 but with a 1.75 hp motor. I really like it and have already done a few projects. I have found though that the blade is out of parallel with the miter slot and went about following the instructions to correct it. When I couldn’t get the trunnion to budge, I started questioning the instructions which said to loosen the mounting bolts and tap the table to adjust. That didn’t make sense since the trunnion is mounted to the table, not the cabinet. I called their customer service and he confirmed that the adjustment is made by moving the trunnion, not the table. He recommended using a dowel and taping the trunnion in whatever direction it needed to go.
I loosened all the mounting bolts and tried to move the trunnion and the thing might as well be welded to the table. I couldn’t move it at all, which lead me to think I had not loosened all the mounting bolts. I double checked everything and all the bolts are loosened but no way is that thing moving. The only conclusion I can draw is that there is not enough play in the mounting bolt holes to move the trunnion even with the bolts loose. Is there something else I can try? Has anyone else with the 713 or 715 had this problem?
Thanks for any help.


11 replies so far

View toolie's profile

toolie

1768 posts in 1315 days


#1 posted 09-14-2013 01:28 PM

no 713 or 715 TS here, but i have had several TSs with table mounted trunions and yours would be the first i’ve heard of where the holes are insufficient to adjust the blade relative to a miter slot. keep looking. i’ll bet you’re missing something that, in retrospect, will seem fairly obvious. have you loosened all 6 bolts that hold the trunions to the table? 2 trunions (one front, one rear) and three bolts per trunion. good luck.

-- there's a solution to every problem.......you just have to be willing to find it.

View knotscott's profile

knotscott

5513 posts in 2062 days


#2 posted 09-14-2013 03:16 PM

They’re definitely table mounted trunnions, so they have a typo in the manual. As Toolie mentioned, note that there are 6 bolts total…3 on each bracket (front and back). You’d be doing them a favor by suggesting that they fix the typo.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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dgrant

29 posts in 403 days


#3 posted 09-14-2013 09:57 PM

I am still working on this problem. I have found that if I loosen the four bolts at the corners and actually remove the two in the middle of the front and rear bracket, I can get the alignment almost dead on. Then, when I go to tighten the bolts, the trunnion begins to move out of position. I can watch the needle on the dial gauge start to move as soon as a bolt gets snug. It doesn’t matter what pattern of tightening I use either. By the time the bolts are tight on the corners, I am out at least 10 thousandths, always in the same direction, and the kicker is that I cannot quite get the middle bolt in the rear bracket to thread back in. I am convinced that something is binding the trunnion and keeping it from moving. Tomorrow, I plan to turn the saw upside down and really study the inner workings to see what is going on. I agree with you Toolie that it shouldn’t be so tightly fitted that you cannot move it a bit. When I have it upside down, I will remove all the trunnion bolts and look at the alignment of the holes relative to the trunnion bracket. If I find out that things are just too tight for movement, I guess my options would be to pack it up and have it returned or ream the bracket holes out just enough to make some room. Not crazy about that option but I will know if its feasible when I flip it over.

When I talked to the support tech on the phone, I did register a complaint about the manual. He said he would forward it on.

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knotscott

5513 posts in 2062 days


#4 posted 09-14-2013 10:13 PM

Turning upside is a good idea, and should provide better access and a better idea of what’s going on. There may be a burr or something obstructing proper alignment. Keep up posted please….this is how we learn vicariously.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View Todd Swartwood's profile

Todd Swartwood

61 posts in 412 days


#5 posted 09-14-2013 10:15 PM

tell tech support about the problem and get there permission in writing by email. That way you will not have to send it back and you will have documentation that they gave you permission to try that fix rather then send it back.
I have had similar issues in the past and they were good to work with.
Todd

-- Todd Swartwood (Todd Swart-Woodworks)

View Splinter12's profile

Splinter12

52 posts in 802 days


#6 posted 09-14-2013 10:16 PM

I had this problem to on my g0661. I loosened all bolts but one and used a clamp on the cabinet and trunnions to dial it in. Just keep and eye that you are not bending the cabinet. Clamp sometimes slips off the front trunnions but I got in a couple tries.

View toolie's profile

toolie

1768 posts in 1315 days


#7 posted 09-15-2013 05:11 PM

i’ve heard of splinter12’s clamp method more than once. i’d probably give it a try before reaming out any OEM holes.

-- there's a solution to every problem.......you just have to be willing to find it.

View dgrant's profile

dgrant

29 posts in 403 days


#8 posted 09-17-2013 04:47 PM

I haven’t had time to flip my saw over yet, however, I have been emailing Grizzly on this issue. The tech told me I might end up needing to enlarge the holes a little if there isn’t a burr or something preventing the movement of the trunnion. He suggested using a Dremel and fine grinding stone. Hopefully, I will get time to work on it later today.

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dgrant

29 posts in 403 days


#9 posted 09-22-2013 03:06 AM

I finally got a chance to get the saw turned over and check it out. I took it almost completely apart to make it easier to deal with. The problem with no trunnion movement for an adjustment became pretty obvious when I took out all the mounting bolts. Its simple engineering. The trunnion mount holes just don’t align very well with the holes in the cast iron table. With the bolts out, there is at least a half inch of movement available in any direction. There are no burrs or imperfections in the castings holding them in place. Its apparent that even with the bolts in both the front and rear trunnion mount loose, there is no lateral movement due to the position of the holes. The bolts are working against each other and locking the mounting assembly into place. Tightening the bolts just makes the problem worse.
Having said all that, the solution should be pretty simple. Tomorrow I will work on widening the holes with a Dremel and fine grinding stone. I don’t need that much lateral movement to get the alignment right, probably not even enough to really see it. I will update when I get finished.

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dgrant

29 posts in 403 days


#10 posted 09-22-2013 08:00 PM

I got it done. I got the adjustment for the blade parallel to the slot down to 2 thousandths which is plenty good for me. I’m not machining parts for the space shuttle after all. I ended up having to take the saw completely apart, which is not necessarily a bad thing since I am now very familiar with the inner workings and parts.

The problem was the alignment of the holes in the trunnion mounts. I started out thinking maybe I could work on them with a Dremel while still in the saw. Not a chance. Even after I got the mounts completely out and in the vise, the Dremel grinding stones were a waste of time. The stone wore out before making any real progress on the cast iron. I ended up having to drill the holes, which I wanted to avoid, but there really was no other way. Fortunately I had a bit that enlarged the holes only by about 1/32 which turned out to be plenty. Got the trunnion mount back in and the blade was within 2 thou just from being bolted in. No adjustment necessary. That was impossible before because the bolts were fighting each other to pull the mount out of alignment.

I will put the rest of the saw together tomorrow and get started on Christmas gifts. Time for football now. On a side note, except for this issue which turned out to be pretty minor, I am happy with the overall quality of the saw. It’s a pretty beefy set up and should meet my needs indefinitely. If something breaks, I sure know how to fix it now.

View cabmaker's profile

cabmaker

1311 posts in 1496 days


#11 posted 09-22-2013 08:21 PM

Good save! Hope you enjoy it!

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