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 Post subject: Re: MD180 drive squeak
PostPosted: Tue Feb 26, 2019 11:08 am 
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Joined: Fri Jun 30, 2017 8:58 am
Posts: 24
My 180 drive is about 18 months old and developed a rather loud squeak. Same as yours only when it was in the water. First I tried lube, that didn’t work. Then I tightened the chain, that made it worse. Next I took the chains off and reinstalled them and that did the trick. I don’t know why but it did.

Now I lube them before and after use. So far so good.
~JOE~


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 Post subject: Re: MD180 drive squeak
PostPosted: Sat Jun 08, 2019 10:50 pm 
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Joined: Sat Jun 01, 2019 5:46 pm
Posts: 18
First outing with brand new 2019 180 drives in two i9s' and we made the mistake of installing the drives before launching from the beach so they dug/brushed the Sandy bottom a bit getting into it. 4 hours into peddling around, one of our drives developed a squeek just like in the video.

Once we got home we hosed both down good with pretty decent pressure but one still had gritty sounding movement.

Looks like we will be tearing them down and replacing bearings since they have probably already been damaged since they squeaked for about an hour. Not sure how this could make it through any cycles without immediate failure. No bearing protection at all. We will be sure to never install the peddle drives until in deep water and to remove them long before beaching going forward. Breaking this down after every time it gets near sand is just not practical and rinsing/ spraying water doesn't get the sand out.


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 Post subject: Re: MD180 drive squeak
PostPosted: Sun Jun 09, 2019 11:51 pm 
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Joined: Sat Aug 16, 2014 4:00 pm
Posts: 569
What a shame, but don't assume radical surgery is needed prematurely. You might try exercising the pedals underwater which gives sand partial buoyancy, and gets into some shielded places. Also spray water straight down between the pedal arms which only releases it's load of crap from a direct hit. Then after drying, hit it with plenty spray lube.

Your drives may have lost their pristine newness, but anyway would have gotten a little scratchy between 7 year overhauls. Maybe at least one of your drives can be saved from bearing surgery for 3 or 4 years and coast in a respectable middle aged status. Think positively, by overhaul time it may be sold, stolen, lost overboard, or upgraded to Hobie's latest nano-aerogel bearings. and you end up saving yourself some trouble. :) Feel the Dao, dominate your fate by going with the flow of the universe rather than flailing to excess; assert your power thru astute inaction.

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 Post subject: Re: MD180 drive squeak
PostPosted: Mon Jun 10, 2019 5:56 am 
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Joined: Sat Jun 01, 2019 5:46 pm
Posts: 18
Almost seems like no grease on the bearings would be better for not picking up sand while not really changing the behavior of the bearing. It isn't like they can overheat while being in the water. I sprayed them directly... However once sand gets in grease, it isn't coming out of it without removing the grease. I have two types of rods coming this week. Debating if I should switch to nylon bearings. I'm pretty sure I'll have to take apart one of them, and I want to do it before we take them out again so any damage is limited.

I really don't know why the bearings aren't sealed unless they are intended to be sacrificial... But by not being easily removable and since hobie doesn't sell them... I'm confused. This would seem to be a pretty common issue. Is it designed to fail? How does anyone's last more than a single season? We only beached once, something that alot of people probably do before getting into the habit (or remembering) to remove the drive while still far away from the beach.


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 Post subject: Re: MD180 drive squeak
PostPosted: Mon Jun 10, 2019 1:20 pm 
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Joined: Sat Aug 16, 2014 4:00 pm
Posts: 569
There are threads here with extensive tests for best lube, and one that rated extremely high was the non-lube wd-40. Well, it has a couple percent of non sticky lube then a bunch of volatile stuff that evaporates. It was approved by Hobie reps, although they may sell a special product for that now.

My mirage drive is 4 years old and is nearly pristine. I am a fanatic about keeping the drive out of the well unless the water is deep enough to guarantee no contact of the bottom with full turbofin sweep. One exception was to lightly rest the bow and horizontally splayed drive on some rounded gravel while I set up the sail, but found that even the slightest boat motion would grind scratches into the plastic body of the drive.

On the inflatable boats, part of the squeaking problem may be heel contact with the floor while pedaling. With a big foot, a wet floor, and the pedals set at a certain number, it can squeak at every stroke. There is a heel strap solution that is supposed to work better than the forward strap regardless of squeak.

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 Post subject: Re: MD180 drive squeak
PostPosted: Tue Jun 11, 2019 10:56 pm 
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Joined: Sat Jun 01, 2019 5:46 pm
Posts: 18
Interesting. I would think wd40 would quickly wash off when submerged with the bearings moving.

I was thinking of using my dry Teflon film lube but that also requires frequent reapplication.

Also, the stock grease is seeping up the main drive shaft the pedals pivot on as well. So I guess as long as I don't use whatever grease comes with the unit fresh, I'll be making an improvement. It doesn't seem to resist absorbing water, leading to it leaking out and it keeps grit stuck to the remaining grease.

I can try wd40 though if that seems to do well on the races.


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 Post subject: Re: MD180 drive squeak
PostPosted: Wed Jun 12, 2019 11:32 am 
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Joined: Sat Aug 16, 2014 4:00 pm
Posts: 569
While looking for the wd40 threads, I ran across this thread where the sand got completely out from my bathtub suggestion https://www.hobie.com/forums//viewtopic ... 11&t=61180

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 Post subject: Re: MD180 drive squeak
PostPosted: Wed Jun 12, 2019 11:17 pm 
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Joined: Sat Jun 01, 2019 5:46 pm
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Took it all apart after work today.

A bunch of the bearings looked like they have been rubbed with dry sandpaper but weren't bad enough to replace. Kind of worrying after just one use. The same issue was on all the surfaces the bearings touch. Not happy about that last bit, but wasn't really worth considering buffing smoother yet.

I decided to use a silicone lube from blaster. It has a similar consistency to wd40 but has Teflon and is supposed to have very good compression friction, so is recommended for bearings. It has just enough surface adhesion to keep the bearings in place if you have a second person keeping things still.


Anyway, back to smooth movements.

BTW, after putting the bearings carriers back together, it squeaked crazy and was hard to move one of the fins. Different issue from my original issue but I found out the problem was the reverse/forward lines. It was binding internally despite all efforts to keep that all organized. I wonder if the line is slipping between the bearings on some people's drives leading to squeaking when the drive is otherwise not making a grinding sound. Just pulling the levers fixed that issue though.

My bearings:
Image


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