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Rebuilding the Oly twins... a saga - Page 9

Postby mogogear on Tue May 15, 2007 3:23 pm

Good News-! For me anyway.

My empty headedness got a little better today -I found the bag with my circlips and piston rod washers and other goodies. So ....... No needing to detour to making new washers has been avoided! So buffing and polishing the face plates and top panels and powdercoating the bodies are the final obstacles- those darn micro scratches from imprudent cleaning -:evil: I hope they can be buffed out easily by me or someone else- :roll:

Does anyone have a Sure-fire polish to recommend for chrome?


Plus a small tease- some nice custom -DIFFERENT- handles and steam knob is becoming a reality from the elves.......... and wait till you see the powder-coat color I chose for the body- I hope the camera will do it justice!
greg moore

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Postby mogogear on Sat May 19, 2007 6:13 pm

Just a couple of details- The Cremina surrounds are off to the powder coater along with the body to the Bezzera- $60 gets all sand-blasted and powder coated. One Cremina will be a matching color to the Bezzera- the other Gloss black. Not bad at $20 each. Of course YMMV in your area- There was a minimum of $50 charge- So I found out what all that would handle- It never hurts to ask. Now I had some light hazing in one polished face plate and some minor bumps, not dents, into the older brushed face plate. After getting a quote form the Chrome folks of $60 to polish one with no guarantee... OUCH! So , among others, I asked Espressme if he knew any ways to achieve a unblemished look on this S/S. His suggestions worked great ! Thanks Richard!

1. I laid the face plate flat on a two adjoining surfaces that had a small gap between . The gap let the reflector area of the face plate that is recessed have some relief. I did tape off the recessed area- but found that it didn't matter since I was using a flat sanding block. The recess stayed mirror polished!!

2. I then used a good rubber sanding block and started with wet / dry 600 grit sand paper and stroked from the bottom curved lip ( that is under the drip tray area when assembled) and pulled in ONE direction -over and over. Note: I spent about 5 minutes on each grade of paper.

3. Then moved to 400 grit- repeated, and then on to 320 grit. All the scratches are gone. I have a very factory fresh satin finish on the face plates ( yes I did both and am very pleased with the look) I don not miss the polished look- This is not better but an very affordable alternative---- have I ever mentioned that I actually had a budget that I was trying to stay within?? Do ask... :oops:

Image

So new gaskets from McMaster- Thanks Bob! are installed under the elements-Now I am foodsafe ! I corrected a mistake in "open-sourcing" that I had made. All seals touching water must be foodgrade! I had forgotten that - Sorry. I will also go back and re-tighten after the initial warm up! These new ones are the 1/16 thickness- but they are very firm and I will want to double check their tightness after acclimating to a hot element in the neighborhood! A regular hole punch worked fine form me to make the bolt holes. I also had to notch the inside edge of the pre-cut gaskets to allow for a little rub with the well that holds the thermostat . I trimmed out a small finger nail gouge and all lined up fine.

One small note-You may or may not recall I used a replacement resettable thermostat made for La Pavoni 127c vs the factory 131c model that I could not get. I will keep everyone informed if it trips too easily. Any way I was going to inform you that like many Olympias that have a metal disc spacer behind your thermostat, this one needs it also. It maintains contact between the Thermostat and the element flange. I had no such spacer- so I made my own- I soldered three old copper pennies together in a stack.. installed .....

The Levers are on and pistons re-assembled in the group-heads. Note- as Steve Robinson indicated as many other have- I used a seal installing tool- basically sharp small scribe -like tool. it has a small thing pointed end about 4 " long. After pushing the pistons in up to where the piston's seals contact the leading edge of the cylinder wall. I then used the seal tool to "tuck" the edge in. All seals and piston shaft and inside of the cylinder walls were lightly lubed DOW Corning 11 o-ring and valve lube. FOODSAFE AND HIGH TEMP! Man o man what am I going to do with 5.3 OZ of this stuff ?


So it is a bout a 2 week wait for the powder coating to arrive. 8) 8) Also some nice baubles are en route! I can't wait to reveal them- nice custom made handles, steam knob and a matching tamper later on.
greg moore

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Postby mogogear on Sun May 20, 2007 2:12 pm

MY brain is dead and now I am doubting my own information.....

QUESTION PLEASE:

Some one please correct me before I put in my PF gasket incorrectly- Inside chamfered edge up .... or down. Seems as if I have always know UP to be the answer. Too long on this project has me doubting myself........ :oops: :oops:
greg moore

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Postby mogogear on Sun May 20, 2007 2:44 pm

While I was finishing up a few details under the hood- I finished one last small modification. I added a V-shaped vertical reflector behind each site glass. This is made from light weight aluminum flashing found in rolls at Home Depot. It is 6.5" tall and 2 " wide. Folder in half along the long axis. So a long V trough. I trimmed tabs in each end to grasp the Site glass fittings when installed. So no screws needed.

So hopefully you can make it out in the picture

Image

I also made a simple "splash / leak shield" for the switches located right below the Steam fittings on the 1981. This should help directly possible drips of water should the fitting leak. I don't know why critical switches are always right under the "faucet" on many machines. Sorry to be so anal on a seemingly small detail. I just go back to when i was needing to source a switch( mine was missing) and I had to make do with re-casting with epoxy resin the broken part of the only switch I could get--The newer models use a switch and opening that is fairly common- Not so on the older girls..

Image

Trussed up waiting on body panels and the handles and knobs...

Image


Ciao' for now
greg moore

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Postby hbuchtel on Mon May 21, 2007 4:54 am

They are looking niiiiiiice Greg... can't wait to see them finished up!

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Postby Paul on Mon May 21, 2007 6:04 am

great stuff. nearly there!

pf gaskets - chamfered edge goes up. I guess the only function is to make installation easy.
cheers
Paul

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Postby timo888 on Mon May 21, 2007 6:28 am

mogogear wrote:While I was finishing up a few details under the hood- I finished one last small modification. I added a V-shaped vertical reflector behind each site glass. This is made from light weight aluminum flashing found in rolls at Home Depot. It is 6.5" tall and 2 " wide. Folder in half along the long axis. So a long V trough. I trimmed tabs in each end to grasp the Site glass fittings when installed. So no screws needed.

I also made a simple "splash / leak shield" for the switches located right below the Steam fittings on the 1981. This should help directly possible drips of water should the fitting leak. I don't know why critical switches are always right under the "faucet" on many machines.


Clever ideas. You should get you a mule and a little covered wagon and travel the land: Bring out yer Creminas! Bring out yer Creminas!

Did you make the drip-guard out of the same material as the sight-glass reflector?

Regards
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Postby mogogear on Mon May 21, 2007 11:57 am

Thanks Paul for the definite answer, and Tim- yes the aluminum is the same stuff. Easy to work with. I have several large guillotine paper cutters- they make short work of crisp lines and cuts. I scribed a line down the center of the 2x6.5" rectangle with a straight edge and a awl. The aluminum has a buff side and a more reflective side- I won't describe it as mirrored- but it does capture light and make it easier to see the water level.

I was happy to have found an old blue line site glass- So I kept it in the 85-- the red one went in the 81. The more I look back at the pictures of the face plates - the pictures don't do them justice- I have to say the fine grit sand paper did an awesome job- they are as close to flawless as you can get for "not new".

Baubles to be here today by 3pm! Yeehaw! Load up the wagon Jed!, we are movin' to Beverly.......
greg moore

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Postby timo888 on Mon May 21, 2007 1:18 pm

mogogear wrote:Baubles to be here today by 3pm! Yeehaw! Load up the wagon Jed!, we are movin' to Beverly.......


Don't fergit them purty coffee-squeezers.
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Postby TUS172 on Mon May 21, 2007 3:09 pm

Very nice work Greg... considering the rebuild costs... about how much will the first 100 espressos cost per machine? :) :P
Bob C.
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