factory flywheel truing photos

[Hubbard]

Does anyone have pics of the truing being done or stories from the men doin it from the 30's thru maybe the 60's? I've always wondered how close they would have gotem and how they were done.

[awander]

I'd bet they used the factory trueing stand, and followed the instructions in the manual. No?

If you want to see someone doing it in modern times, look up Tatro Machine on Youtube.

[Hubbard]

So it's safe to say that your answer to my question is no, I don't have pics of the workers in the harley factory truing flywheels.Or any prudent info.

[awander]

So it's safe to say that your answer to my question is no, I don't have pics of the workers in the harley factory truing flywheels.Or any prudent info.

"prudent info"? What's that?

No, I don't have any photos. Sorry if I upset you...

[RooDog]

Harley quit getting them that close with the Twinkies, and that's why $&$ gear drive cams won't work in many of those engines. Too much pinion runout.... And that's prudent....

[1950Panhead]

Does anyone have pics of the truing being done or stories from the men doin it from the 30's thru maybe the 60's? I've always wondered how close they would have gotem and how they were done.

There are photos on page 62 in the 47 service manual.
Within .001" of true.
The men who trued flywheels did 100 each day, like any skill they were very good at it.

[Andygears]

Thanks, interesting. But I watched till the end to see the rig for holding the flywheels for final tightening. At a dealer where I worked we had large aluminum V-blocks that we held in the hydraulic press to keep them from moving while final tightening. Were they already torqued before truing?

Andygears

[Larry]

I've seen a factory photo of the truing operation. The man used a hammer.

[Buddhahoodvatoloco]

they where spot on, not close.

Does anyone have pics of the truing being done or stories from the men doin it from the 30's thru maybe the 60's? I've always wondered how close they would have gotem and how they were done.

[RooDog]

It's always a good idea whenever one had a cam cover off an engine to use a dial indicator on the bushing end of the pinion and check the runout. Flywheels have been known to shift after being stressed in service....
....RooDog....

[awander]

Thanks, interesting. But I watched till the end to see the rig for holding the flywheels for final tightening. At a dealer where I worked we had large aluminum V-blocks that we held in the hydraulic press to keep them from moving while final tightening. Were they already torqued before truing?

Andygears

The way Tatro(the guy in the video posted by Roo) does it, is to hold them in his hydraulic press for torqueing, but instead of V blocks, he uses the front ad rear press rails to align them. And yeah, final torque is applied before trueing.

[RooDog]

I like the way Tatro used a block under the wheel he is not trying to move while hitting the other with that monster lead hammer of his, or what ever it is made of.
Jim's makes a tool to spread and / or squeeze the wheels rather than using a wedge or clamp....

https://catalog.zodiac.nl/en/23-oil-che ... -tool-5830
....RooDog....

[Mongrel505558]

When my friend and I put my wheels together he had a cradle made from wooden blocks. After marking the spot to be hit he would move the assembly off the stand and into the cradle before whacking it rather than hitting it on the stand, so no impact was transferred to the truing stand.

And regarding what RooDog said about Twinkie runout. The first couple of years they were better than later. I guess the MoCo realized that they could save some money since the cam chain doesn't care about runout nearly as much as gears would.

[RooDog]

The Book says to loosen the centers a little before striking a truing blow with a hammer, but not too loose as that may damage the stand's centers.
Cranks may also be indicated on wheel truing rollers, but the adjustments have to be made on the bench, as Mongrel has described. What ever it takes to get them where they need to be. And as a final check, indicate the end of the pinion shaft once installed in the cases.
May also be done on a lathe between centers.....
....RooDog....

[Hubbard]

Maybe I should have worded it differently but what I'm interested in is a picture of the workers in the milwaukee harley factory in the 30's-60-s truing flywheels. Such a picture may not even exist. Or possibly someone has talked to one of the harley factory workers that did this work. I was just curious if they had a special jig or fixture to speed up the process in an assembly line atmosphere.