captain wrote: ↑
Wed Aug 11, 2021 12:08 pm
Be careful it doesn't vibrate itself off the stand.
Funny you should mention vibration...
I've been noticing more and more vibration with the RIX but not knowing where it was coming from. I figured it was finally getting old and bearings were loose or wearing out. It was overdue for a piston ring and head re-build and I'd been putting it off... kind of not wanting to know what I might find.
Well anyway, I finally did get into it and when I took the belt off, I expected to find a bunch of wiggle and play in the pulley (sheave) on the compressor shaft. But it was solid and smooth spinning. Son of a gun... Nothing wrong with the compressor bearings. Then I gave the sheave on the motor a spin and it actually wobbled. Sure enough all of the looseness and wobble was coming off the motor. So I thought maybe the motor was shot. BUt then I replaced the sheave on the motor and THAT took away all of the wobble, rattle, and looseness. SO... It turns out I was using an adjustable sheave to tune the RPMS as close as possible to 2300 RPM. The locking screws on the adjustable sheave ad worked themselves loose... And that was the entire source of the vibration issue I was experiencing.
Okay so once I got a good solid new sheave/pulley installed on the motor, all that was left was to do a normal re-build. This is just taking each of the heads apart. You clean off any carbon and then replace the O-rings with Viton dura 70 and 90. Re-assemble but don't re-install yet... The 3rd stage piston is a floater and you'll need to push it out from the piston head side. Re-building the pistons is the only expensive part of this. I spent $270 for new teflon piston rings, O-Ring backers, and teflon riders. Put it all together and wow... It's now running smooth and filling fast... On my compressor stand and it's not vibrating off!