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Rocker Spindle Guide - How does it work? #77265
02/10/05 6:33 pm
02/10/05 6:33 pm
Joined: Apr 2004
Posts: 538
Toronto
Matthew Manton Offline OP
BritBike Forum member
Matthew Manton  Offline OP
BritBike Forum member
Joined: Apr 2004
Posts: 538
Toronto
Hi Guys,

I have just damaged two rocker spindle O-rings and have now found out that there is a tool for the job.

I have seen a picture of the tool how does it work?

Cheers
Matthew
Toronto


Matthew
1970 T100S
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Re: Rocker Spindle Guide - How does it work? #77266
02/10/05 9:18 pm
02/10/05 9:18 pm
Joined: Jan 2003
Posts: 554
west central ohio where all be...
D
drp Offline
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drp  Offline
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D
Joined: Jan 2003
Posts: 554
west central ohio where all be...
Matthew

The sleeve ID compresses the o-ring. You put the o-ring on the shaft slide it through the ID of the tool, butt it up against the hole on the rocker box and slide it in place.

I was told by a reliable source that there was supposed to be a small 10 to 15 deg. chamfer on the ID of rocker arm shaft holes. According to this guy it was supposedly in a service bulletin but was never incorporated at the factory (could be bullcrap). He said that the sleeves don't work real well either and the chamfer allows you to put the O ring on the shaft and slide it in without shaving the OD of the o-ring. Chances are you could break the sharp edge and accomplish the same thing.

In my past life building aircraft generators we coated the o-rings with “o-ring honey” (STP like stuff) before putting them in. I bought a set of o-rings and thought I'd break the sharp edge of the hole, make the tool, lube up the o-ring and give it a try. Good luck.

Dave

Re: Rocker Spindle Guide - How does it work? #77267
02/10/05 9:38 pm
02/10/05 9:38 pm
Joined: Oct 2002
Posts: 546
minnesota
J
joe a. Offline
BritBike Forum member
joe a.  Offline
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J
Joined: Oct 2002
Posts: 546
minnesota
hi, never used one but i assume it is a oring guide(bullet)tool probably tapered on the id and put on the spindle and as you slide it over the oring its compressed then you install the spindle..you should first ck to see if you have the correct size o'ring then taper the rockerbox hole slightly at the end with a countersink bit this will help compress the o'ring....

Re: Rocker Spindle Guide - How does it work? #77268
02/10/05 9:51 pm
02/10/05 9:51 pm
Joined: Oct 2002
Posts: 546
minnesota
J
joe a. Offline
BritBike Forum member
joe a.  Offline
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J
Joined: Oct 2002
Posts: 546
minnesota
hi dave, parker o'ring lube or dow dc 111 are a few o'ring lubes..even vasoline works ok.

Re: Rocker Spindle Guide - How does it work? #77269
02/10/05 10:47 pm
02/10/05 10:47 pm
Joined: Jan 2003
Posts: 522
San Diego, CA
Will S. Offline
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Will S.  Offline
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Posts: 522
San Diego, CA
I had a conversation with John Healey, President of the TIOC at the Cachuma Lake rally last year, and he basically told me the method drp listed in the first post, use a file to create a chamfer on the ID of the rocker shaft hole, then use some lube and small screw driver to persuade the O ring into place. I think there was also a recent article in the TIOC newsletter outlining this process.
beerchug


Will S.
BSAs: '66 & '69 Lightning
Triumphs: '68 TR6R, '68 Bonneville, '73 TR7, '55 6T
'71 Norton Commando

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Re: Rocker Spindle Guide - How does it work? #77270
02/10/05 11:52 pm
02/10/05 11:52 pm
Joined: Apr 2004
Posts: 538
Toronto
Matthew Manton Offline OP
BritBike Forum member
Matthew Manton  Offline OP
BritBike Forum member
Joined: Apr 2004
Posts: 538
Toronto
Hi Guys,

Thanks for the info. I will chamfer the ID of the hole.

Cheers
Matthew
Toronto


Matthew
1970 T100S
Re: Rocker Spindle Guide - How does it work? #77271
02/10/05 11:54 pm
02/10/05 11:54 pm
Joined: Oct 2003
Posts: 11,138
North Georgia, USA
RF Whatley Offline
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RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,138
North Georgia, USA
The tool is basically worthless. There are easier and quicker ways to achieve the same result.

If you have the shafts out, you can touch the opening with a single flute 3/4" dia countersink and chamfer the entry. This basically builds the tool into the rocker box.

If the boxes are on the bike, rotate the engine until both rockers have slack and slide the shaft out about 3/4". You can then chamfer the entry with a sharp but small pocket knife.

Then I thoroughly clean the o-ring groove and rocker box. Then fill the groove completely with silicone sealer and pop the new o-ring into the groove. A pile of silicone sealer will pop out of the groove and onto the shaft. Rub this all over the top of the o-ring. This will lube the o-ring for entry. Tap the shaft back into place with a plastic-tipped mallet.

The excess sealer will come off the box as one continuous string after about 20 minutes. Don't wipe the sealer or upset the curing of the sealer during this 20 min period. The end result is an absolutely leak-proof rocker shaft.

Hope this helps. bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
Re: Rocker Spindle Guide - How does it work? #77272
02/11/05 3:35 am
02/11/05 3:35 am
Joined: Apr 2004
Posts: 538
Toronto
Matthew Manton Offline OP
BritBike Forum member
Matthew Manton  Offline OP
BritBike Forum member
Joined: Apr 2004
Posts: 538
Toronto
Thanks RedNeck,

The rocker box is off the bike, so your method sounds good.

Thanks
Matthew


Matthew
1970 T100S
Re: Rocker Spindle Guide - How does it work? #77273
04/10/05 6:33 pm
04/10/05 6:33 pm
Joined: Aug 2001
Posts: 14
Maui,Hawaii
T
tommer2 Offline
BritBike Forum member
tommer2  Offline
BritBike Forum member
T
Joined: Aug 2001
Posts: 14
Maui,Hawaii
Hi Guys,

Redneck has THE answer!!!! I use this method and I NRVER have a problem!!!!!!

Tommer2

Re: Rocker Spindle Guide - How does it work? #77274
04/10/05 10:41 pm
04/10/05 10:41 pm
Joined: Mar 2005
Posts: 10,022
Boston, Massachusetts
J
John Healy Online content

BritBike Forum member
John Healy  Online Content

BritBike Forum member
J
Joined: Mar 2005
Posts: 10,022
Boston, Massachusetts
Well, the factory drawing does show a 15 degree chamfer in the rocker shaft hole. For some reason not all rocker boxes have it. Mind you the people who assembled these bikes were pretty handy with their hands when they wanted to be. The next time you are at a flea market check out the rocker boxes.

As far as the tool is concerned, I agree that they are useless!!!

Whatever lube you use, siicone, grease, oil or whatever, it doesn't matter, the key thing is you shouldn't have cut a small section of the "O" ring off during assembly. If you did you HAVE TO DO IT AGAIN or it will leak.
RedNeck is right the job can be done without taking the rocker box off the motor. Follow his directions. Although I find it a bit easier to loosen the tappets a half a turn to take all of the pressure off the shaft.
I have a small 4" Snap-On screw driver that I annealed and bent to about 80 degrees. I narrowed it a bit. I use this to remove circlips and to push the "O" ring into the groove as I offer the shaft to the box.


Re: Rocker Spindle Guide - How does it work? #77275
04/11/05 1:30 am
04/11/05 1:30 am
Joined: Jan 2003
Posts: 554
west central ohio where all be...
D
drp Offline
BritBike Forum member
drp  Offline
BritBike Forum member
D
Joined: Jan 2003
Posts: 554
west central ohio where all be...
I bought the O rings some time ago and after riding about 80 miles today on my "71" T120 I got tired of the oil leak, pulled off the rocker arm covers (figured I'd replace the gaskets also) removed the shafts, replaced the o'rings and put it back together. It was strange, the exhaust side had the chamfer but the intake didn't. Unless someone replaced o'rings prior to "74" when I bought the bike it must have been like that from the factory. I chamfered the intake rocker and it was easy getting the o'rings in. I had more trouble getting all the springs and washers lined up and next time I'll make a tapered alignment tool for the spring & washers alignment.

Dave


Moderated by  John Healy 


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