R10 mk2 blow out. ( guidance required)

[cloverleaf]

Well, you are going to say that as you sell them and make money fitting them. I’m just trying to offer advice to the guy, so he knows where he’s going and it doesn’t incur costs other than minimal parts.

The weakness has always been the disc, they move so they seal at different points, give inconsistent sealing and when worn lead to creep. Once run in, after a few hundred shots they need resetting again and the set pressure is different from that on the scale on the top so require.

Myself and others have found the factory regulators once set up correctly work better than the aftermarket replacement. They’re poorly lubricated from the factory and often not adjusted to the optimum setting. However, once assembled with appropriate lubricants and set correctly they’re fine.

Thanks - I appreciate your faith in my integrity

I sell them because of the significant demand for replacements given how abysmal the originals are, and I suspect Huma have sold orders of magintude more of this model than any of their others for this reason.

Of the many I've supplied, I think the only few complaints I've had have related to O-rings on the outside getting nicked on their way into the block and seats failing due to excessive adjustment.

Every reg has its strengths and weaknesses; the OEM reg and Huma are no different. The OEM reg allows external adjustment (which the Huma doesn't) and is more tolerant of repeated adjustment due to the soft O-ring seat. However, IME these seats give their own issues including long-term transient changes in output pressure as they compress over time / operation cycles... while of course the elephant in the room is their abysmal reliability - which unsurprisingly matters more to owners in the real-world than ultimately inconsequential variations in output pressure of a few bar.

The forum is here for the collective good of all it's members and as usual I'm very happy if @Widow can go away and do this job himself with the knowledge he's gained.

However in this case the JB reg complicates matters significantly; and given that neither you, I, or probably anyone other than JB has the kit to corretly setup the reg fitted, how do you suggest the OP addresses this issue if he chooses to retain the reg?

 

[Widow]

Hi @Widow,
If you send some pictures of the regulator block I should be able to advise you if it’s the factory reg or a JB one. It’d help if you could unscrew the regulator so I can see what type it is, older or newer version, older ones aren’t good, but they didn’t stay around for long. A reseal takes about an hour, then you have to ensure there are no leaks and set the regulator to the correct setting for the calibre of your gun.

What version of the R10 is it and what calibre?

Mk2 se, .22 o think around 5/6 years old now. Standars length, ive not had it chopped down.

Ill get some pics .

 

[Widow]

In and of itself the job's typically 3-4hrs, however I there can be complications (need for parts, stuff that doesn't go according to plan) that can add time. In addition I like to hang onto guns I've resealed for at least 24hrs (ideally longer) to ensure that they're holding air and everything's as it should be.

I have done a few almost "while you wait" jobs for far-flung folks, but this is typically a case of them visiting for the weekend, staying somewhere local and taking in the sights while I do the job over a couple of days. This has panned out OK but there's always the chance for plans to be scuppered if something unforseen crops up.

As for doing the work yourself, the excellent XTX videos already posted by @Wayno-81 offer a decent level of guidance and should give you an idea of what to expect. If Bowkett's been at it, on the one hand the anti-tamper rubbish should have been removed (a good thing) but his mods are somewhat varied so can throw up their own set of issues; in this case one being the need to depressurise the reg before it's removed which is imperitive if you don't want it leaving at speed when it's unscrewed.

Only you can decide whether you're happy to do the work; at the minimum you'll need decent hand tools (Allen keys, screwdrivers etc), probably a decent pillar drill, a vice with soft jaws, a chrono and ideally some way of measuring reg pressure if you want to get it near-perfect. I can supply regs preset to a ballaprk correct figure based on barrel length and calibre, however the mods made by JB can alter the behaviour of the gun and hence it's ideal reg setpoint... which can complicate matters if you're unable to test the gun off-reg to identify the ideal reg pressure setting.

Thank you clover leaf....

 

[Blackmax]

Mk2 se, .22 o think around 5/6 years old now. Standars length, ive not had it chopped down.

Ill get some pics .

That will likely have the newer regulator in it as long as it wasn’t replaced by JB. Regulator setting will be about 80 bar.

 

[cloverleaf]

Thank you clover leaf....

No worries - that's what the forum's here for!

I'm off up the club now; will be back a bit later in the day if my input is required any further.

Regardless, good luck getting it sorted whichever way you go

 

[Widow]

I would love to attempt this myself, but ,
I have absolutely no knowledge or the correct equipment for testing. . I am a boiler engineer so have decent screwdrivers and a resonable socket set with torx bits and a decent set of Allen keys.

I appreciate all the time taken to help me out.

 

[Blackmax]

I would love to attempt this myself, but ,
I have absolutely no knowledge or the correct equipment for testing. . I am a boiler engineer so have decent screwdrivers and a resonable socket set with torx bits and a decent set of Allen keys.

I appreciate all the time taken to help me out.

Pop some pictures of the block over and I can advise you what reg you have. You can then decide how you want to go.

 

[Widow]

Pop some pictures of the block over and I can advise you what reg you have. You can then decide how you want to go.

Will do... thanks again.

Ilt will have to be tomorrow though,.

Thanks again.

 

[Deejayuu]

Apology for bit of a hi-jack but the JB innards here may be of interest. When this failed, the plan was to modify the 'accumulator' chamber to fit belleville stack on assumption the rest would function as required.
Didn't proceed 'cos found an original BSA.
Hmm! I feel another tinker coming on

 

[Blackmax]

Apology for bit of a hi-jack but the JB innards here may be of interest. When this failed, the plan was to modify the 'accumulator' chamber to fit belleville stack on assumption the rest would function as required.
Didn't proceed 'cos found an original BSA.
Hmm! I feel another tinker coming on

Thanks Jules, I’m presuming your one had no pressure in it?

 

[Deejayuu]

Thanks Jules, I’m presuming your one had no pressure in it?

Can't remeber! Vague recall of a 'pop' as unscreweed. The internal restrictor, under ball valve, is enlarged/modified on this block