1949 WL - Speedometer Gear Drive

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1962300
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1949 WL - Speedometer Gear Drive

#1

Post by 1962300 » Sun Jun 09, 2019 6:47 pm

I have had both types of gear drives: the nylon gear and the brass gear. They have both lasted a less than adequate time.

Anyone have an opinion on which to go with for longevity?
I assume, also, I should disassemble the rear wheel to inspect the gear inside the hub.
F U N

Thanks for any thoughts and opinions.



1950Panhead
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Re: 1949 WL - Speedometer Gear Drive

#2

Post by 1950Panhead » Sun Jun 09, 2019 11:51 pm

Brass gear is stronger then nylon.
Keep the drive gears greased, cable greased will work good.
If the drive gears get dry, cable gets dry, original speedo turns 100 or 1000 miles stresses parts and fails.
.

1962300
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Re: 1949 WL - Speedometer Gear Drive

#3

Post by 1962300 » Mon Jun 10, 2019 3:27 am

No one makes them with steel gears, eh?

George Greer
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Re: 1949 WL - Speedometer Gear Drive

#4

Post by George Greer » Mon Jun 10, 2019 7:58 am

If I may chime in.....

My WLA, when I was overhauling it, the speed-0 drive would eat its self up after just 10 or 20 miles. I tried plastic, brass both and they both were destroyed. I will add that the brake drum/sprocket assembly was aftermarke

Bruce Palmer told me what to do.... and that was make sure that the drive was installed correctly and to hoist the ass end of the bike on the stand, and slowly rotate the rear wheel and make sure that there was not any binding, and if so, mark the tire with chalk and disassemble the rear end, and follow the chalk mark to the drive gear on the brake assembly and inspect that area,

Mine had the binding, and after taking the complete rear wheel apart it revealed that the rear drive that's pressed on to the brake/drum was not completely pressed on, it was pressed flush to the top of the drum causing a mis-alignment of the rear drive.

Make sure that the gear on the brake/sprocket assembly is completely driven on, there will be about .030" protruding from the surface of the gear when properly pressed on.

I have since found a NOS rear assembly and installed it and don't (as of yet) have any binding or eaten up gears.

I have attached photos of the NOS and aftermarket drum, and you can clearly see the mis-alignment of the gear and where the two were not meshing correctly.

Hope this aids you in finding a solution for your issues.

George
Attachments
gear2.JPG
gear2.JPG (154.31 KiB) Viewed 159 times
repo.JPG
repo.JPG (141.58 KiB) Viewed 159 times
nos2.JPG
nos2.JPG (139.84 KiB) Viewed 159 times
nos1.JPG
nos1.JPG (138.66 KiB) Viewed 159 times

1962300
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Re: 1949 WL - Speedometer Gear Drive

#5

Post by 1962300 » Fri Jun 21, 2019 12:22 am

What IF a Speedometer Drive Gear WAS machined out of Steel?
Wouldn't that solve the "eating of the gear", as it occurs with both the Plastic & Brass versions of the gear?
Thanks

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Re: 1949 WL - Speedometer Gear Drive

#6

Post by john HD » Fri Jun 21, 2019 11:29 am

Third option, use the OEM bakelite gear if you can find one. Bakelite seems to retain grease better.


Everything needs to be perfectly clean, mine had old cosmoline with dirt on the drive gear that was chewing up the small gear. The depth that the drive unit is installed will make a difference too.


john

George Greer
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Re: 1949 WL - Speedometer Gear Drive

#7

Post by George Greer » Sat Jun 22, 2019 7:02 am

I would think that it would not solve anything, but probably make it worse.

If it is out of alignment, it does not matter what the gear is made of........

It is STILL out of alignment or meshing properly and will most likely eat up the drum side and the drive side gear as well, giving ya 2 more things to fix.

Find out why the improper meshing of the gears.

My advice and 2 cents.

George

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