do you need to be an apeks service technician to change a din wheel?

[ziggi]

cheers
well could have been worse i could have named and shamed!

[HP]

Actually getting enough pressure on the DIN slug on a DS4 without a torque wrench and one of those "spare hand" doohickeys that screw into a port, is pretty hard. They need to be very tight (30nm if I recall) and if you don't get them that tight, they have a habit of coming undone which is not fun underwater

[Rupert Bear]

Do you need insurance Rupert?

[Richard Mason]

Actually getting enough pressure on the DIN slug on a DS4 without a torque wrench and one of those "spare hand" doohickeys that screw into a port, is pretty hard. They need to be very tight (30nm if I recall) and if you don't get them that tight, they have a habit of coming undone which is not fun underwater

Yeah well, mine was bought with DIN and the thing was loose as all fook when I got it home; it's a bit of a joke this legend that LDS will not never do it wrong; they seem tobe placing themselves on the same level as Drs but at least we know they don't make mistakes. :-)

[Digger]

Actually getting enough pressure on the DIN slug on a DS4 without a torque wrench and one of those "spare hand" doohickeys that screw into a port, is pretty hard. They need to be very tight (30nm if I recall) and if you don't get them that tight, they have a habit of coming undone which is not fun underwater

You're going to put 30nm on the first stage, with a bar in a LP/HP port to hold it? You sure it's 30nm?

Braver man than me, it's only brass. I'd be putting the entire first stage in a well protected vice to do that, you could easily shore off the threads from a LP/HP port with that kind of force.

For any non-engineering types, 30nm is just about enough to make me grunt slightly as I get the torque wrench to click. And that's a 2 foot long bar to hold on to. You'd never be able to apply that much force with an allen key, which is what most of your DIY DIN wheel fitters will have available...

Digs.

[Woz]

Actually getting enough pressure on the DIN slug on a DS4 without a torque wrench and one of those "spare hand" doohickeys that screw into a port, is pretty hard. They need to be very tight (30nm if I recall) and if you don't get them that tight, they have a habit of coming undone which is not fun underwater

Old CO2 cartridge in an LP port and hold the first stage in a vice. Get a big adjustable that goes over the A clamp and unscrew the A clamp nut. Screw the DIN wheel in to a torque of "bollocked up hard".

Do not try this at home unless you can positively identify the thing you are sat on is NOT your elbow.

[Digger]

Old CO2 cartridge in an LP port and hold the first stage in a vice. Get a big adjustable that goes over the A clamp and unscrew the A clamp nut. Screw the DIN wheel in to a torque of "bollocked up hard".

Do not try this at home unless you can positively identify the thing you are sat on is NOT your elbow.

But can someone doing this in their front room with a vice fitted to their coffee table ever get an allen key fitting "bollocked up hard"?

Other thing to bear in mind is watching people chuck an allen key in the end of the fitting, and then ask what all those bits of goldy dust are coming out of the hole afterwards - there's a filter in there, and while it's not massively sensitive, if you twat it hard and lean on an allen key you will destroy it.

The more I think about it, the more argument I see for getting an LDS to do it. Most will do it for free if you buy the part there, it's not a complex task, but if you get it wrong at least at the LDS you've got someone who should put it right.

Digs.

[Woz]

But can someone doing this in their front room with a vice fitted to their coffee table ever get an allen key fitting "bollocked up hard"?

Other thing to bear in mind is watching people chuck an allen key in the end of the fitting, and then ask what all those bits of goldy dust are coming out of the hole afterwards - there's a filter in there, and while it's not massively sensitive, if you twat it hard and lean on an allen key you will destroy it.

The more I think about it, the more argument I see for getting an LDS to do it. Most will do it for free if you buy the part there, it's not a complex task, but if you get it wrong at least at the LDS you've got someone who should put it right.

Digs.

Hence the arse and elbow thing. If you don't know what you're doing and don't have a bloody great big bench vice like I have and an extension tube for an allen key, don't try it.

[nickb]

You're going to put 30nm on the first stage, with a bar in a LP/HP port to hold it? You sure it's 30nm?

Braver man than me, it's only brass. I'd be putting the entire first stage in a well protected vice to do that, you could easily shore off the threads from a LP/HP port with that kind of force.

For any non-engineering types, 30nm is just about enough to make me grunt slightly as I get the torque wrench to click. And that's a 2 foot long bar to hold on to. You'd never be able to apply that much force with an allen key, which is what most of your DIY DIN wheel fitters will have available...

Digs.

Digs, 30Nm is not a huge torque. Dunno about the DS4, but 30Nm IS the torque required to install the DIN stem on a Mk25 and most 'service technicians' in the past substantially overdid it. For this reason Scubapro modified the stems with the addition of a sacrificial collar designed to deform at 42Nm to prevent the cracking of the reg body.

These thing are not meant to be installed with an Allen key but a hex bit on a torque wrench and mounted in a vice. Threaded bars or old CO2 cartridges screwed into an LP port are for emergency 'field' repairs or cowboys.

[Woz]

Digs, 30Nm is not a huge torque. Dunno about the DS4, but 30Nm IS the torque required to install the DIN stem on a Mk25 and most 'service technicians' in the past substantially overdid it. For this reason Scubapro modified the stems with the addition of a sacrificial collar designed to deform at 42Nm to prevent the cracking of the reg body.

These thing are not meant to be installed with an Allen key but a hex bit on a torque wrench and mounted in a vice. Threaded bars or old CO2 cartridges screwed into an LP port are for emergency 'field' repairs or cowboys.

Yeeeee harrrrr! BTW you need a pair of soft jaws in your bench vice.