RIX SA3E

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swimjim
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Re: RIX SA3E

Tue Jun 06, 2017 6:01 pm

Looks like your drive belt may be a little loose Eben. Might want to check that out.

Swimjim

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SurfLung
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Re: RIX SA3E

Thu Jun 08, 2017 1:48 pm

Hi Jim,
Yeah, that flappy look has bothered me, too. I've thought of putting an idler wheel in there. The belt is actually very tight (I think)... I have a 3 foot pry-bar I lean on as I tighten the motor mounts. The top is the slack side when the compressor is running so maybe that's why it looks like that.
SurfLung
The Freedom and Simplicity of Vintage Equipment and
Vintage Diving Technique are Why I Got Back Into Diving.

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antique diver
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Re: RIX SA3E

Thu Jun 08, 2017 2:28 pm

SurfLung wrote:Hi Jim,
Yeah, that flappy look has bothered me, too. I've thought of putting an idler wheel in there. The belt is actually very tight (I think)... I have a 3 foot pry-bar I lean on as I tighten the motor mounts. The top is the slack side when the compressor is running so maybe that's why it looks like that.



There is a page on correct belt tensioning in the manual for my SA6. Probably included in your SA3 manual as well, but if not I can scan it to you, although the specs could be different on the smaller block. Too tight is not good for your shaft bearings on motor and compressor

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SurfLung
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Re: RIX SA3E

Wed Jun 21, 2017 12:18 pm

Filled at 3 cf/min last night...
- Well, after all of the piston re-ringing and head rebuilding, I slipped the adjustable speed pulley onto the RIX. The specs say at 2300 RPM, it will pump 3 cf per minute fill rate. I turned it on and measure the compressor's RPM... It was a little too fast at 2400+ rpm. So, I dialed the adjustable pulley back one turn, re-tightened the belt and turned it on again. I think it measures 2296 rpm... As close to 2300 as I can get!
- I didn't fill tanks right away so last night when filling and topping off tanks for the Fortune Pond trip was the first time I could give everything a good try. Good results all around:
1 - The fill rate was noticeably faster. My twin tanks and Aluminum 80s actually got warm during their fills... Usually only the single 38s and smaller get warm when I fill them.
2 - The compressor was running cooler. Usually the fan air coming out the back is very warm. This time is was just slightly warm.
SurfLung
The Freedom and Simplicity of Vintage Equipment and
Vintage Diving Technique are Why I Got Back Into Diving.

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