Apeks MTX-RC Servicing

[jzlassme]

Does anyone have the service manual of the Apeks MTX-RC first & second stage? Please PM me if you can send me a copy, appreciated.

 

[axxel57]

Does anyone have the service manual of the Apeks MTX-RC first & second stage? Please PM me if you can send me a copy, appreciated.

Not so easy.
You have to find an Aqualung/Apeks Dealer who attended the 65,-US$ Online Course for that model and is willing to share the Service Manual, which is included, for free with you.......

 

[inka]

i have the MTX.R first ans second if it helps.

 

[admikar]

As far as I can tell, 1st stage is same for R and RC version.
2nd stage RC has cracking effort adjustment knob.

 

[211ratsbud]

What information do you need from the service manual?

 

[jzlassme]

What information do you need from the service manual?

A gentleman sent me the MTX-R version manual. I think I am good now, as I can reference the XTX 200 manual to service the breathing control knob. I believe they are exactly the same. I suspect the whole valve design is the same between XTX and MTX.

The only thing I would like to know is the tuning specs for RC, is it the same as XTX 50/200?

 

[admikar]

A gentleman sent me the MTX-R version manual. I think I am good now, as I can reference the XTX 200 manual to service the breathing control knob. I believe they are exactly the same. I suspect the whole valve design is the same between XTX and MTX.

The only thing I would like to know is the tuning specs for RC, is it the same as XTX 50/200?

Do you have MTX FLOW/NO FLOW tool? If yes, just tune it to that. That's what factory recommends anyway.
If you don't, you can still use old "sink it in the water" method.

 

[jzlassme]

If you don't, you can still use old "sink it in the water" method.

How it works? Can you provide an instruction?

 

[admikar]

How it works? Can you provide an instruction?

Errrmmm, did you receive reg repair training?

 

[jzlassme]

Errrmmm, did you receive reg repair training?

No, planning to DIY. I did a few research on tuning, none of them mentioned the water bucket method. Here is what I summarized.

1. Verify IP from first stage is within spec.
2. Set the lever height using the inline tool. Set to edge of freeflow, maybe another 1/16 turn the orifice IN to accommodate the new rubber seat break in.
3. Fine tune the spring tension and verify the cracking effort using the magnehelic gauge. I believe some people even skip this step if the second stage has a control knob.