ScubaPro MK25/G260 service help please

[buddhasummer]

That special tool will not fit over a conventional LP hose nut to engage the Scubapro knurled nut. But soft jawed pliers work fine or just wrap the knurled nut with a piece of inner tube and use regular pliers. You might even consider replacing the knurled nut with a conventional nut.

Thank you, is there a specific SP part number to replace with a conventional nut? That seems easier and probably cheaper than trying to get the specific tool.

 

[redacted]

Thank you, is there a specific SP part number to replace with a conventional nut? That seems easier and probably cheaper than trying to get the specific tool.

Not that I know of but the bore and thread size are standard to accept an LP hose so it should just be a matter of finding a jam nut of about the right length from any manufacturer. In the mean time, a protective wrap and a pair of pliers should work fine to manage that jam nut. I have seen some regs including scubapro 2nds that add an o-ring between the case and the jam nut to act as a torque cushion which seems smart with plastic cases.

 

[buddhasummer]

Not that I know of but the bore and thread size are standard to accept an LP hose so it should just be a matter of finding a jam nut of about the right length from any manufacturer. In the mean time, a protective wrap and a pair of pliers should work fine to manage that jam nut. I have seen some regs including scubapro 2nds that add an o-ring between the case and the jam nut to act as a torque cushion which seems smart with plastic cases.

I will do as you suggest, thank you for your help.

 

[diversteve]

There's a G250 schematic/manual at http://www.frogkick.dk/manuals/scubapro/ No idea if it's similar enough.

 

[runsongas]

have you tried using a seafood cracker?

 

[NotSure]

I bought a pair of used G260's a few years ago and was able to rebuild them easily without a manual. If I remember correctly they use the same poppet as the G250 but have an adjustable balance chamber. The MK25 is one of the easiest 1st stages I have serviced. The MK20/25 assembly tool is nice to have for aligning the bushings and "O" ring but not necessary.

 

[NotSure]

 

[buddhasummer]

have you tried using a seafood cracker?

Theres a novel idea, funnily enough I did actually look for one today, no joy.

 

[Tbar]

This does the 2nd stage jam nuts and the pin body on the first stage
Scubapro Multi-Tool, Brass Chrome

The first stage assembly tool
Scubapro Mk20/Mk25 Assembly Tool

With the S600 and G250 the older regs need a tool to adjust the balance chamber, not sure this applies to the G260. If this is the case it may be cheaper to upgrade the balance chamber adjuster. There is a guy in Japan selling this upgrade for about $40 each.

Scubapro Balanced Chamber Tool

With respect to holding the jam nut when fitting hoses, the balance chamber has a square end that fits into the body, it will not turn when you tighten the hose - assuming you are using appropriate torque!
Some of the regs have plastic jam nuts, there crack easily if over torqued - they are really just there to keep the balance chamber in place and don't require much force, as mentioned earlier these can be an o-ring between the nut and body.

 

[buddhasummer]

This does the 2nd stage jam nuts and the pin body on the first stage
Scubapro Multi-Tool, Brass Chrome

The first stage assembly tool
Scubapro Mk20/Mk25 Assembly Tool

With the S600 and G250 the older regs need a tool to adjust the balance chamber, not sure this applies to the G260. If this is the case it may be cheaper to upgrade the balance chamber adjuster. There is a guy in Japan selling this upgrade for about $40 each.

Scubapro Balanced Chamber Tool

With respect to holding the jam nut when fitting hoses, the balance chamber has a square end that fits into the body, it will not turn when you tighten the hose - assuming you are using appropriate torque!
Some of the regs have plastic jam nuts, there crack easily if over torqued - they are really just there to keep the balance chamber in place and don't require much force, as mentioned earlier these can be an o-ring between the nut and body.

Thanks very much for the information, very useful, I'll look into it. cheers.

---------- Post added June 28th, 2015 at 10:40 PM ----------

Does anyone know if the G260 requires the tool for the balance chamber? Cheers.