knucklehead oil filter

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1950Panhead
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knucklehead oil filter

#1

Post by 1950Panhead »

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Re: knucklehead oil filter

#2

Post by 1950Panhead »

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Mongrel505558
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Re: knucklehead oil filter

#3

Post by Mongrel505558 »

Looks great, but from the pictures it looks like the filter and line to the oil tank are sitting on the rear pipe. It's going to get pretty hot.
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Re: knucklehead oil filter

#4

Post by 1950Panhead »

The exhaust clears the filter.
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Re: knucklehead oil filter

#5

Post by 47str8leg »

Not a good idea. Did that on mine . Going to strip out your rocker box threads.
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Re: knucklehead oil filter

#6

Post by RUBONE »

47str8leg wrote: Sat Feb 18, 2023 5:26 pm Not a good idea. Did that on mine . Going to strip out your rocker box threads.
That is the way the factory did it and with the proper long bolt there is no issue mounting that way. Mine has been on there for 32 years and never even loosened a bit....
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47str8leg
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Re: knucklehead oil filter

#7

Post by 47str8leg »

Well ymmv then.
I’d keep a careful eye on it.

Mine was custom but this was a pic during mockup from many years ago. That was a copper bracket made for attaching to an electric buss bar on a large electric service. I heated, bent it it and smoothed out the edges. I modified the round hole to a square hole with small files until I was able to use a carriage bolt. I cut the bolt length just long enough to be able to use a wrench to tighten the carriage bolt up into the rocker box then drop the bracket down onto the square hex of the bolt. Then I could tighten both of the lock nuts up and down . This kept that bracket from rotating at that point. The bracket , though copper , was plenty stout enough and did not bend or move. Eventually though it started to wear out the threads. I was lucky enough to catch it in time before it lost all of them. I canned the filter , was able to get a bolt to hold ( I was sweating that one out ) and bent another line to fit.
The copper lines were out of necessity , not just looks . The Tedds oil tank I bought had 37 degree flare fittings on it. I didn’t know about the flare differences until it was too late at the time. Making these lines were an exercise in patience and my hat is off to anyone who makes them out of steel. Contrary to popular belief I had to make them for two bikes and , dine properly will hold up very well.
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Re: knucklehead oil filter

#8

Post by RUBONE »

My lines are homemade from brake line tubing. The mounting bracket is original H-D, not nearly the drop of yours or the OPs homemade one. .
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Re: knucklehead oil filter

#9

Post by 47str8leg »

Perhaps the drop became the problem . I wasn’t happy with having two points of rotation loosening under vibration. Hence the carriage bolt idea. Though I tried I couldn't figure out a way around keeping the filter mount side from having a rotating axis.
Thought quite tight , the lowering of the filter probably increased the harmonics under vibration up into the rocker box damaging the threads.
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Re: knucklehead oil filter

#10

Post by 1950Panhead »

Though I tried I couldn't figure out a way around keeping the filter mount side from having a rotating axis.
The oil lines hold the filter in place.
I have installed filters on four knuckles, used a long bolt and tighten, never had one come loose.
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