Got the 816S running, weird trans noise - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
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post #1 of 33 Old 06-22-2015, 04:02 PM Thread Starter
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Got the 816S running, weird trans noise

This is the 816S that I burned the coil up on, got the new coil and spark was restored. I went ahead and buzzed the flywheel nut off and the keyway wasn't sheered so I knew it was sparking when it should. Then I started back on fuel. Cleaned the carb out again, blew compressed air through all the passages and stuff. Then I blew air back through the line going to the tank and let it run until clean gas was coming out. Then slapped it all back together with a new filter and started cranking on it. First it would only run with the choke on, then after messing with the main jet for a bit I was able to get it running with no choke but it would die at anything less than half throttle. Then I got a new spark plug just because and messed with the carb some more, mainly setting the idle speed screw a little higher and it was running pretty good for the most part.

When I took it for a spin I noticed it was making a bad rattling noise which at the time I thought was coming from the trans, but after going back today and getting video it seems like it's coming from that clutch on the left side. Only in high range too. I think it has a bearing? Low range sounds a little weird too but if that's the only noise it made I probably wouldn't have been so concerned. I'm not sure what these clutches are supposed to look like as far as wear either.

Right side:


Left side:


Here's the video, the time stamps where you can really hear it are :42, 1:09, 1:36 and 2:05.


Everett



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post #2 of 33 Old 06-22-2015, 10:18 PM
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Re: Got the 816S running, weird trans noise

That must be a 16hp Briggs thing...mine does it too. Mine seems to be from the forward clutch, but it's internal to the trans.

It's odd because my dad's 8199kt with well over 3k hours is absolutely quiet...and it's not had an easy life.

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post #3 of 33 Old 06-23-2015, 09:10 AM Thread Starter
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Re: Got the 816S running, weird trans noise

Can anyone elaborate on this? Should I be concerned or is it normal and I should just ignore it? Is this a thing where the unique way such a large single cyl engine fires wears out these transmissions? I can't seem to wrap my mind around why this would be specific to the Briggs models. I guess I'm reluctant to just start putting this thing to work if it's just going to get worse and eventually fail.

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post #4 of 33 Old 06-23-2015, 10:06 AM
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Re: Got the 816S running, weird trans noise

Look at the thread about my 8162-B, a lot responded its normal and not to worry about it.

Did you change the transmission oil? I eead one persone found that to help immensely...did nothing for mine.

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post #5 of 33 Old 06-23-2015, 12:43 PM Thread Starter
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Re: Got the 816S running, weird trans noise

I think I even posted in that one. Thanks, I'll put that on the list of things to do. It certainly seems to function properly.

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post #6 of 33 Old 06-23-2015, 03:10 PM
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Re: Got the 816S running, weird trans noise

From your clutch pics, unless you can take up more slack by pulling the forward (right side) clutch assy. away from the plate by hand with the tractor in neutral, it looks like there is too little gap between the clutch, and the plate. The gap looks more the way it should on your reverse (left side) clutch assy. The gap between the clutches, and plates should be 0.20 thousandths, adjusted all around the circumference of the clutch assys. They are adjusted by loosening/tightening the 2 nuts on the threaded rods.

Have you greased the three small rollers in the plate? No guarantee that any of this is contributing to the noise, but it can't hurt to try.


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post #7 of 33 Old 06-23-2015, 05:53 PM
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Re: Got the 816S running, weird trans noise

I thought the gap was 0.70", the thickness of the ignition key?

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post #8 of 33 Old 06-23-2015, 07:44 PM
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Re: Got the 816S running, weird trans noise

I thought .060. Wouldn't be the first time I was wrong.

Don Evans

I thought I had G.A.S. under control, I was Gravely mistaken

1963 L8 - Under reconstruction M 96599, M# G-5451
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1973 408 rider
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post #9 of 33 Old 06-23-2015, 07:57 PM Thread Starter
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Re: Got the 816S running, weird trans noise

It says .060 in the operator's manual I have. I have a lot of maintenance to catch up on.

Everett



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post #10 of 33 Old 06-23-2015, 09:15 PM
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Re: Got the 816S running, weird trans noise

This is what appears on page 6 in my 810-816 Owners Manuel. Headered: "Forward-Reverse Clutchs":

"Gap-.020-.030 inch (Even gap all around) Readjust clutchs when gap exceeds .050. Adjust by tightening nuts on studs. Be sure nuts are tightened equally."


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post #11 of 33 Old 06-23-2015, 09:31 PM Thread Starter
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Re: Got the 816S running, weird trans noise

This is from the 78 800 series operator's manual:

Everett



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post #12 of 33 Old 06-23-2015, 10:00 PM
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Re: Got the 816S running, weird trans noise

Mine even states to use the key as the gauge when adjusting clutches...but that's an 8123.

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post #13 of 33 Old 06-23-2015, 10:04 PM
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Re: Got the 816S running, weird trans noise

I have a service bulletin somewhere on why they widened the clutch gap (late '70s, I believe). As I recall they said it was for "smoother engagement." Let me see if I can dig it out tomorrow.

Of course, they could've changed their minds again a couple of years later.

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post #14 of 33 Old 06-23-2015, 10:37 PM
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Re: Got the 816S running, weird trans noise

Gravely change their minds? Nah!

Don Evans

I thought I had G.A.S. under control, I was Gravely mistaken

1963 L8 - Under reconstruction M 96599, M# G-5451
1972 816
1973 408 rider
1973 C - Parts tractor S/N 88418
1973 C8 - Current workhorse
1983 5200 - Current workhorse
30" Quick hitch mower
30" 106 mower
MA-210
48" plow blade
Restored Estate Sulky
Restored Standard Sulky
Lawn Roller
Pull behind dump cart
Chain guard for the 30" mower
Rotary plow
Haban sickle mower
Kwik way loader
Wish list 3/4's of a mile long

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post #15 of 33 Old 06-25-2015, 08:22 PM Thread Starter
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Re: Got the 816S running, weird trans noise

I was all set to just ignore that noise and move forward with adjusting every little thing according to the operator's manual. Then I took a rear wheel off to adjust the clutch gap and saw it was missing a roller. (both sides were)






Then I took it off and spun in by hand. Also, it looks like there's no clutch left on this one, it was the one on the left.

It sure sounds like the noise I'm hearing, and the other one isn't much better. I assume I need a new one since it's completely worn out but can I just replace the bearing on the other one?

And I also spent a little time cleaning, it's in pretty decent shape.






I still need to clean more, just ran out of purple power.

Everett



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