Board index Flathead Power-Technical Questions, Answers, and Suggestions 45 Flatties Cam bushings to bearings

Cam bushings to bearings

Moderators: Curt!, Pa

Post Thu Jan 15, 2009 9:14 pm

Posts: 6
I am hearing that there is a bushing/bearing swap for 45". Anyone have any info on this?
Thanks

Post Fri Jan 16, 2009 1:25 am

Posts: 56
Location: new zealand

there are a few choices avaliable . i have converted to timkin caged needle rollers . they are a direct fit and require no machining of the cases , i did however have to make small oil feed holes in the brg cases to align with the oil feed holes in the engine cases. be careful when fitting the brgs that they clear the crankpin nuts. also you will have to make some thrust washers to fit on each end of the cams so the cams dont wear thru the brg housing or the alloy casing. i have also seen timkin roller brgs fitted simillar to that found in a skate board wheel ( larger size of course ) i think they are a sealed roller brg but will require the cases to be machined .

Post Sat Jan 17, 2009 8:55 am
panic

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Last edited by panic on Mon Jan 19, 2009 10:41 am, edited 1 time in total.

Post Sat Jan 17, 2009 9:11 am

Posts: 131
Location: BRANFORD, CT

Hi Panic,

Can you fill me in on the "sportster eyeglasses"
I'm just finishing up the machining on the WR Peek-A-Boo cover and will also be machining the casting for the bushing models.
I have been looking into using needle bearings for the standard bushing shafts, but am cancerned about the amount of press fit in standard cases, oiling on the cam cover bearings and retaining the ones in the engine side.
I've got photos of the raw castings on my website http://www.enfieldracing.com

Thanks,
Bruce
Bruce Argetsinger
AHRMA Dirt Track # 67J
www.enfieldracing.com

Post Sat Jan 17, 2009 9:42 am

Posts: 750
Location: Pa. , USA
Sportster eyeglasses, (#25551-58 cam gear plate) used on engine case side as thrust washer when using #9057 needle bearings , note ; may have to trim from the top side of plate if tappet drops against them depending on your cam grind, Tim
Vintage roadracing, Class C, AHRMA # 335

Post Sat Jan 17, 2009 11:52 am

Posts: 131
Location: BRANFORD, CT

Thanks Tim,

Anybody got a picture of one?
Bruce Argetsinger
AHRMA Dirt Track # 67J
www.enfieldracing.com

Post Sat Jan 17, 2009 12:39 pm

Posts: 766
Location: CA USA
Bruce,
Pretty good drawing in the ironhead parts book.

Post Sun Jan 18, 2009 2:19 am

Posts: 56
Location: new zealand

in my previous comment re oil feed holes i totally meant holes in the cam cover. the brgs in the engine case are splash mist dribble fed . i made spacers because the cams had alot more end float once the brgs were fitted so i cut the ends from the old cam bushes, machined to fit over the od of the cam brgs and pinned them to both inner cases where the cams run , i then pre assembled the cases with cams and bush ends [ brass thrusts ] in place and remeasured the end float so i could determine the thicknesses of the steel thrust shims i needed to get the correct spec end floats. there is no doubt an easier way . i have a lathe so it seemed the most logical way of doing it. we dont have easy acces down here to a lot of old parts so we tend to make things out of other things ;thats why i didnt use the sportster eyeglasses; that would be the easiest choice if ava . for example a blue flame inlet valve is harder to find in nz so to do the larger valve i used a bedford 300 truck valve , i shortened it about 8mm and reground a groove in it to fit the origonal hd keeprs and it was a perfect fit in the hd guide . re hardened the end . thanks.

Post Sun Jan 18, 2009 9:20 am

Posts: 131
Location: BRANFORD, CT

ICE MC has a kit listed on his website http://www.icemc.com
Bruce Argetsinger
AHRMA Dirt Track # 67J
www.enfieldracing.com

Post Sun Jan 18, 2009 11:08 am
panic

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Last edited by panic on Mon Jan 19, 2009 10:41 am, edited 1 time in total.

Post Sun Jan 18, 2009 11:09 am
panic

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Last edited by panic on Mon Jan 19, 2009 10:42 am, edited 1 time in total.

Post Sun Jan 18, 2009 2:44 pm

Posts: 131
Location: BRANFORD, CT

Thanks Panic,

This is greatly appreciated.
I assume that converting a WL to needle bearings 3 of these could be used,2 on the engine ends of each cam, and 1 on the cover side of # 3 & 4.
The photo looks like steel, is it hardened?
It would go right against the cases and be the same thickness as the flanges on the bushings, the shims would then go between this piece and the cam?

Bruce
http://www.enfieldracing.com
Bruce Argetsinger
AHRMA Dirt Track # 67J
www.enfieldracing.com

Post Sun Jan 18, 2009 5:39 pm
panic

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Last edited by panic on Mon Jan 19, 2009 10:42 am, edited 1 time in total.

Post Mon Jan 19, 2009 12:54 am

Posts: 56
Location: new zealand

i replaced all the bushes in the engine case with caged needle rollers and three in the cam cover/housing . the only one i didnt replace was the outer bush for the cam that runs the oil pump. and yes do make sure that whatever u use doesnt interfere with a# the crank nuts and b# the cam followers esp on their downward stroke .

Post Mon Jan 19, 2009 6:32 am

Posts: 975
Location: Markt Einersheim, Germany

Anybody got photos of how this should look, after all parts are properly installed.

Engine side and camcover side?

George

Post Mon Jan 19, 2009 7:58 am

Posts: 131
Location: BRANFORD, CT

I just saw that the spectacles can't be used on the WL cover side because the bushings are at different depths.
The end play is to the the side faces of the gears and cams, where as on the WR the end play is controlled by the bearings which fit to shoulders on the shafts.
Could this be the reason the were not used on the cover side of the sportster?

Bruce
http://www.enfieldracing.com
Bruce Argetsinger
AHRMA Dirt Track # 67J
www.enfieldracing.com

Post Wed Jan 21, 2009 8:40 am

Posts: 766
Location: CA USA
Bruce,
Here is a pic of how to put xl needle bearings into the cam cover.
http://cgi.ebay.com/ebaymotors/ws/eBayI ... &viewitem=
This appears to be a modified mid 1939-up WLDR cam cover.

Post Wed Jan 21, 2009 10:37 am

Posts: 20
Location: Muncie, IN
Do not have any affiliation or product knowledge, but found this site when researching this subject. Hope it is of some use.
Regards,
http://www.icemc.com/product_-_bearings

Post Wed Jan 21, 2009 6:14 pm

Posts: 750
Location: Pa. , USA
DRGN RYDR , FYI over the past 15 years i converted 3 race 45's to needle bearings using big cams and valve springs and never had a failure :wink:
( knock on wood )
Vintage roadracing, Class C, AHRMA # 335

Post Thu Jan 22, 2009 7:48 am

Posts: 6
Tim 435 wrote:
DRGN RYDR , FYI over the past 15 years i converted 3 race 45's to needle bearings using big cams and valve springs and never had a failure :wink:
( knock on wood )

Thanks
I have found an article detailing how to and bearings to use.

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