large clutch gear removal

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gubba

New Member
Dec 29, 2008
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jacksonville, florida
first....
is it common for all of the little BB sized bearings (3mm?) to fall out when you remove the large gear ring (over 50 of them)??


next...
I have bought chrome steel bearings to replace the old poor quality ones. I need to know where and how to put them in.


is there a manual available for this (or pictures/documentation)?


TIA

stay dry

gubba
 
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toytime

New Member
Mar 20, 2008
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Ontario
Use grease to hold them in place and you should see a circular grove that they rest in. The groove will be near the very centre
 
Creative Engineering

Creative Engineering

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Sep 20, 2008
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Gubba,

The ring that holds the ball bearings is supposed to be a tight press fit onto the hub. If it came apart that easily, you will likely need a new one. Did you use the puller tool that comes with some of the kits to pull the hub? Or did the gear just come off?

The CAD graphic below shows how it goes together.

Jim
 

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G

gubba

New Member
Dec 29, 2008
149
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jacksonville, florida
thanks for the info Jim...
the gear was sloppy and i just 'walked' it off. looking at the CAD, i don't think i even removed the hub.
thanks for the pic, i get the idea now. i use MollyLube to keep the bearings on the hub (after i remove it) and press it back together, right??
now if i can figure out how and wwhen the keyway goes in.......lol
 
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G

gubba

New Member
Dec 29, 2008
149
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jacksonville, florida
jim....
i got to thinking...(uh oh)...
the CAD that you provided must have come from a series of CAD's on the removal and reassmbly from startto finish. If so, these would be so helpful and i promis to share the info.
can do?

TIA

stay dry

gubba
.wee.laff
 
Creative Engineering

Creative Engineering

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Sep 20, 2008
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Gubba, correction!!!

Some of these engines do use 3mm bearings! I ordered several thousand 2mm bearings from miller and got back to the shop and realized that two of the engines I have here were set-up with 3's.

I hope I didn't cause any confusion.

Jim
 
G

gubba

New Member
Dec 29, 2008
149
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jacksonville, florida
lol
that explains conflicting info, some saying 2mm and some saying 3mm.

now i need some instructions on replacement procedure..... then i guess i will find out which i have.... i just received 100 3mm from Boca Bearings.

is your webaite manicmechanic.com ???

any additional CAD's would be most welcome

stay dry

gubba
 
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RedB66

RedB66

Active Member
Dec 28, 2007
1,020
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38
Sunshine State
I pulled the large clutch ring off my motor...I used the large side of the clutch removal tool and it came off as one sealed unit. Replaced it with a new (different) clutch ring.

I must admit that I was leary to pull the gear off having heard that there are numerous bearings but....success...very simple process, providing it comes off as one unit.
 
H

Huffathump

New Member
Feb 24, 2009
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indiana
is it possible to do this procedure without the clutch removal tool? I got my kits from BGF and they didnt come with the tool.
 
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toytime

New Member
Mar 20, 2008
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Ontario
I can remove most things without a puller like fly wheels, crank arms and magnetos by leaving the nut flush with the end of the shaft and holding the weight of the engine up by the part I want off and giving it a good blow with a hammer. It may seem stupid but the shock wave travels through the part and pops off. If the nut is even with the shaft, you save the threads but you do have to be careful. You don't want to mushroom the shaft end.
 
H

Huffathump

New Member
Feb 24, 2009
30
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indiana
getting it off was not too hard- now how do I get it back on? Is there an easy way? something I am missing? or should I go ahead and fabricate something to mount on the spindle and push it back on?

so far I have managed to spread 3mm ball bearings all over my shop- but that is about it!
 
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toytime

New Member
Mar 20, 2008
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So maybe you can solve a puzzle for me. I've heard that those bearings are "loose" and get held in place with grease until it's all together. Last week a person said the bearings are a one piece unit. What did you find? Never having to work on my clutch, I'm confused.
 
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trackfodder

Member
Sep 8, 2008
347
3
18
I have a Gru Bee clutch problem

The clutch on the GruBee 70 got to slipping, probably due to over greasing the gear case. I attempted to clean what I could reach with brake cleaner spray. No luck. Finally ordered 2 returned blocks from Dax and couldn't remove either big gear at first, so removed the corks from both and then was able finally to remove one gear. I stuffed the corks back in and tried to fit to the Gru Bee, It was too tight and wouldn't fit. I removed the corks from the Gru Bee and installed the ones from Dax. Still no clutch. I assume the plate has to be turned and all the corks surfaced to present a united front to the driven plates. What to do? Has anybody ever re-corked successfully? What is the operation? Maybe I need to bite the bullet and get a new gear assy. from Gru Bee?
I apologize if the info is buried somewhere in this stuff, but there is so many pages, so little time. If you get your cookies raving at me go ahead and I will just delete. Thanx
 
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toytime

New Member
Mar 20, 2008
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Ontario
This is from a guy who has never had his clutch apart. When you first tried the pads "to fit to the gru bee", do you think you should have loosened the clutch cable? I'm thinking that there was too much pull from the cable because it was adjusted for a worn/slipping clutch.
 
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trackfodder

Member
Sep 8, 2008
347
3
18
Toytime--No, the clutch linkage was adjusted for free play and while tightening the derby the clutch pin was engaged in the handle to compress the spring. The spring is a trick thing. There is a slot in the hollow sprocket shaft that has a right angle thing sticking out behind the sprocket side end of the spring. It is part of the small threaded shaft the derby nut with all the half-holes screws onto. when screwed on it compresses the spring which pulls the derby (outer clutch plate) against the gear pressing it against the inner plate with the 3 pins. I don't think a clutch will work unless all the corks are the same height. KW
 
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