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rear upright strut tubes

PostPosted: Tue Jul 28, 2020 4:26 pm
by gjz30075
FS: I have a pair of uprights that came out of issue 18 castings. One is bent and the other is very good.
Both have good threads. If you feel you can straighten the bent one, you're all set for narrow spring
setup. The one with the regular spring perch has one side flattened in to clear tire, a normal procedure,
it seems, on all normal rear spring perches.

If you have buggered threads, you can probably cut off the top part of either tube and mate to your tube.
$40 US, for the pair, +shipping.

Email: gjz30075 -at- gmail.com

Re: rear upright strut tubes

PostPosted: Sun Aug 02, 2020 3:45 pm
by bill308
Hi Greg,
How did you separate the tubes from the castings?
Bill

Re: rear upright strut tubes

PostPosted: Sun Aug 02, 2020 4:19 pm
by gjz30075
I had my machinist guy do this: He put them in a press with slight pressure on the tube (from the
bottom), then heated the casting (don't know what heat source he used) and slowly pushed them
out. He was concerned because the tube was pretty rusty, as you can see, and was afraid of
scratching the casting but the rust isn't bad and the casting is not scratched. I should probably
take a wire wheel to the rust to clean it up for better presentation :-).

I purchased a pair of new tubes for narrow springs and my concern now is how to get them in.
A few threads mention the oven at 'x' degrees but nobody mentions the duration needed. I'm not
a cook so I have no idea how long to leave them in.:-)

Hope this helps.

Re: rear upright strut tubes

PostPosted: Sun Aug 02, 2020 5:07 pm
by StressCraxx
gjz30075 wrote:I purchased a pair of new tubes for narrow springs and my concern now is how to get them in.
A few threads mention the oven at 'x' degrees but nobody mentions the duration needed. I'm not
a cook so I have no idea how long to leave them in.:-)

Hope this helps.


Once the casting is hot enough, install the tubes right away. They don't need to "bake".

Re: rear upright strut tubes

PostPosted: Sun Aug 02, 2020 5:14 pm
by gjz30075
Ok, thanks. Looks like a two man job, one to push in the tube and the other to hold the casting. Just
trying to be prepared.

Re: rear upright strut tubes

PostPosted: Mon Aug 03, 2020 11:55 am
by gus
I have not done strut tubes,but have done valve seats

the hole in the casting should grow 5-7 thousandths of an inch at 250F
If you but the tube in the freezer you will get another thousandth

Put it together fast, as soon as they touch the temp will normalize and they will be as one.
You might want a block of wood and a mallet, heavy gloves
All happens in 2 seconds
A helper is good, as is having the wife gone.....

Originals would be more difficult as they need to stay oriented

Re: rear upright strut tubes

PostPosted: Tue Aug 04, 2020 2:04 am
by nomad
gus wrote:I have not done strut tubes,but have done valve seats

the hole in the casting should grow 5-7 thousandths of an inch at 250F
If you but the tube in the freezer you will get another thousandth

Put it together fast, as soon as they touch the temp will normalize and they will be as one.
You might want a block of wood and a mallet, heavy gloves
All happens in 2 seconds
A helper is good, as is having the wife gone.....

Originals would be more difficult as they need to stay oriented


Experience obviously.
In my youth and motorcycle racing days mothers kitchen got dual use when she wasn't around! Bearings in the freezer overnight and cases in the oven. Did have to make sure they were clean because the smell of burned oil lingers! :D

Kurt

Re: rear upright strut tubes

PostPosted: Thu Aug 13, 2020 5:39 pm
by knockoffnut
I have a technical question for clarification: how do you get the wife gone...?

Re: rear upright strut tubes

PostPosted: Mon Aug 17, 2020 4:36 pm
by jk952
1. Surreptitiously locate wife’s ipad and google “cashmere sweater sale” or something similar.
2. Write note “sold some lotus parts, thought you may like a treat”.
3. Using both hands, carefully prise open your folded device so as not to crack the unused leather.
4. Remove $300.
5. Whilst sucking air between teeth, place the $300 and note beside ipad.
6. Wait 30 minutes, turn on oven.


:)

Re: rear upright strut tubes

PostPosted: Tue Aug 18, 2020 8:46 am
by alan.barker
+1 nice.
Just be sure when you've finished cook up a nice spicey Curry to mask any stuburn smells.
Open a bottle of Wine and light the Candles on the Table next to the Josh sticks 8)
Alan