Specialized Grease Fitting for Freewheels

BungaEBiker

BungaEBiker

100 W
Joined
Jan 13, 2009
Messages
109
I was watching the latest video from Power In Motion and Molly was talking about greasing a freewheel instead of using oil. She used a grease fitting specially designed fitting to inject the grease where it was needed. She also mentioned that she didn't think that they made the part anymore. With some searching I found this.
http://www.bikepartsplace.com/discount/freewheel-lube-injector-tool/
IT's a set grease fitting like the one she used. Looks like it's quite useful. Especially here in Canada where the road grime can eat steel parts like acid due to the high amounts of salt spread on the roads. I love finding things like this. I hope this is useful for anyone who uses a freewheel on a rear mounted hub motor.

Cheers

P.S.
Here's the video I mentioned.
http://www.youtube.com/watch?v=GELBI0ASyZU&feature=sub
 
BungaEbiker:

You are fast and must be an early bird. I posted the video around 3AM in MST last night. thanks for the comment!

Here is embedded video:
[youtube]GELBI0ASyZU[/youtube]

Here is the grease that we used in the video. It is a low temperature, high pressure grease, it’s for snowmobile. Should be available in most auto parts store. LowTempGrease [800x600].jpg
 
Lol. Yep I sure am. Thank you for putting up the vide in the first place and thank Molly to. How do you in-bed the video like that I try and it comes up as code when I do.
 
The last time I removed and cleaned a freewheel cluster set I used some grease out of a spray can I bought a long time ago, YEP Grease in a spray can. It is thinned down with something and when it is sprayed on it goes on in a squirt like a water pistol and goes in like water into all the tiny gaps. Then it bubbles away furiously while the gas and thinner escapes out of it, that gas escaping creates space to suck more liquid into the gap, when it stops bubbling it is like really tacky chainsaw bar oil and sticks like $h*t to a blanket and just gets stickier until it is just grease in there.

The time before that was an ordinary freewheel sprocket, after it was cleaned I put a smear of grease on the face with the little gap then heated the centre with a lpg torch on low and spun it a bit, watched as the grease ran in. It kept running in as it cooled too. Got hot enough that it was getting uncomfortable to touch for too long. Once it had cooled the excess grease on the outside was just wiped off with a rag, you could tell that grease had gone in by the feel.

Time before that I completely disassembled a freewheel and cleaned and greased it and reassembled the 96 friggin tiny balls and some springs and screwed it all back together, I can't recommend that highly enough if you are seriously into meditation at all. lolol

The adapter in the video would take all the fire breathing madness out of it though.

Alan
 
Typical practice in bearing packing is to pump grease until it oozes out the opposite side. The few strokes Ms. Molly demonstrated were barely enough to even fill the space formed by the adapter.

A video showing the grease coming out the other side will confirm the o-ring can hold enough pressure to force the grease through the freewheel gaps - and that the guts are indeed well greased. With Love.
 
I think she already did that. This was just a demo of what to do. I didn't know such things existed, I just oiled my chain and kept going through the gears to make sure all the gears got a good (or so I had though) coating. Once money isn't to tight I am going to get one of those fittings.
 
TylerDurden said:
Typical practice in bearing packing is to pump grease until it oozes out the opposite side. The few strokes Ms. Molly demonstrated were barely enough to even fill the space formed by the adapter.

A video showing the grease coming out the other side will confirm the o-ring can hold enough pressure to force the grease through the freewheel gaps - and that the guts are indeed well greased. With Love.
Click to expand...
Tyler:
Thank you for your comment and your detail observation. You are absolutely correct about the video should have some indication as when it is good enough, and the grease should fit it all the way inside the freewheel. Especially for viewer that doesn’t know much about this, and for first-time DIY. We will improve our next video to include other indication for the viewer.

However, Molly has been pumping the grease gun all day to fit about 50 – 100 freewheel. The grease gun hose had already fitted with grease, there were not air inside. If it’s first time you do this, the first 3 pump is just to get the air out. In this case, it was not necessary. We also observed when applying the forth pump, the grease will come up on the other side, which is very messy and hard to cleanup. We also have to package it. So it was just enough with three pump to fit the grease in this video and as well as a finish product.

We also have informed the manufacturer the lack of grease inside the freewheel could cause problem, improvement should apply to their process. All of our new freewheel will have enough grease inside directly from the factory.

Once again, thank you for your comment!
Ken
 
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