XRV204-110 Major overhaul video

[Tycho]

So...

the last 3 weeks I have done major overhaul on an XRV163-165, XRV204-165 and a XRV204-110.


I just started on the second XRV204-110, snagged a go pro camera from out PR guy and made some video of the disassembly.
Can be seen here:


https://www.youtube.com/watch?v=kaTAfJLThmA

I'm going to start putting humpty dumpty back together tomorrow and I'll try to make a video of the full assembly if anyone is interested.



The 110 is kinda interesting, because it is so short it's the only XRV204 where you can pull the slidevalve out through the front of the compressor.

There is a special tool you can fit through the discharge port to keep it from sliding to far forward (can be seen in the video at 1:55).

So if you find yourself replacing an actuator piston seal on an XRV204-110, first make sure to set the manual Vi spindle ALL THE WAY clockwise, this will release the pressure on the spring so it won't push the slidevalve all the way out.

Also take care when pulling the actuator piston out, make sure it doesn't snag on the threads on the center bolt and you inadvertently pull the valve to far.

Like I mentioned, there is a special tool, but who want's to disconnect the coupling, suction flange, discharge flange and all the oil lines just to replace an actuator piston seal right

as long as you are careful and not pull it to far forward, it will stay in place.

I have had a colleague find himself in the unfortunate situation where he pulled it to far out and the whole slidevalve fell down into the discharge chamber.

It is possible to get it back in without taking the compressor apart, but it took me around 2 hours elbow deep in the actuator piston housing before I got it back in position... so it is possible, but it is absolutely not something I want to do again

[Tycho]

Video showing the tool in place, and what can happen if the tool is not in place

[Tycho]

Shared the video other places and a recurring question was

What is this:
skruer.jpg

What this is, is a piece of teflon plate where I have drilled holes where I can put compressor bolts

The XRV comes with same threads, but different lengths...

Before I would just lump them all into a box and that was it...

Until assembly when I had to make sure I picked out the correct length bolt.

So I took a plate and drilled a 4 by 5 grid, then 1 4 and one 3.

So when dismantling an XRV
The first five are for the male thrust cover, second five female thrust cover, third is male non thrust (shaft seal cover), fourth is Female drive end, fifth is spare, sixth is actuator piston cover, seventh is manual Vi cover

bolt lagring.jpg

[seanf]

keep posting Tycho, youve usually got something interesting, useful or funny.

[RANGER1]

keep posting Tycho, youve usually got something interesting, useful or funny.

I will second that Seanf

[Tycho]

Video is still processing on youtube, hopefully be available shortly.

Final disassembly and assembly up until preloading Male rotor disc spring and tightening retaining nut

[Tycho]

final part of the assembly



Like and follow?

Maybe I'll post more :P

[seanf]

An air of care. (thumbs up emoji thing)

[RANGER1]

Tycho,
I see comments on other sites about your video.
Everyone does things a bit different, as long as it works, who cares.
I have difficulty wearing gloves when doing this work, hopefully mineral oil will not kill me, anyway to late to worry.
Keep up the good work.
If its going on International space station use Mycom��

[seanf]

Whats the secret end clearance adjustment method?

[RANGER1]

No secret, machine thrust bearing cover to adjust.

[seanf]

I take it Howdens way of doing the adjustment is to sell you another cover?

[RANGER1]

Seanf,
Cover would be cost of new machine.
If all bearings seated & everything detailed, like high spots on rotor end faces, discharge end face, clearance should be correct as it was from factory.
If correction required, precision lathe work on cover carried out.
Must be perfectly parallel to each other.
Face machined depends on if clearance to big or small.

All these machines are about cleaning & detail for reliable operation.
Also check & double check everything ( Tycho indicates this in video).
If checks not carried out it goes pear shaped pretty quickly.

[seanf]

Always a bit disappointing opening parts boxes to find its not made of solid gold, some daft prices.

Nice to see someone caring about what they do. Just wondered if there was some knowledge to steal from Tycho with his adjustment method, but I guess hes just on about machining or shimming.

[RANGER1]

Did you take note of the store he got his parts from $$$$.

Mycom best value for money, compressor & parts reasonable pricing, lots of easy to get manuals, very reliable.