n00b doubles assembly question

[HullBlister]

OK, my new set of LP85s (Thanks Phil!) just came and I am in the final stages of assembly. So far I have only managed to fully assemble the valves and manifold but in my haste I put the tank boots on before the bands.

Easily fixed. But I digress.

This may seem really stoopid, but does it matter what side of the bands the wing nuts are that are used on the band bolts - BP side or tank side?

On my other BP/W single setup, the wing nuts are on the BP (by my back) but they are recessed into the BP enough that they don't make contact with me. However, for some reason with the doubles, the stick out enough that they will for sure hit me. If I reverse it, and put the bolt heads between me and the BP then everything would seem to be fine. I just wanted to make sure that there was no DIR or other rule that would prohibit this.

Nylock nuts may help here, but I won't use them because of galling and I want to be able to pull this set apart without tools.

Thanks!

Blister

 

[Gombessa]

This may seem really stoopid, but does it matter what side of the bands the wing nuts are that are used on the band bolts - BP side or tank side?

I'm not sure I understand. Are you asking if you can thread the bands so that the bolthead is permanently trapping your BP and wing, and the wingnuts are on the back of the tanks (the side opposite the valve openings)?

If the bolts are too long for your backplate, the better solution would probably be to use a thread follower and cut the excess threads off.

 

[HullBlister]

I'm not sure I understand. Are you asking if you can thread the bands so that the bolthead is permanently trapping your BP and wing, and the wingnuts are on the back of the tanks (the side opposite the valve openings)?

If the bolts are too long for your backplate, the better solution would probably be to use a thread follower and cut the excess threads off.

Close. Maybe even just semantics.

What I would like to do is run the bolts through the bands so the bolt head is between me and the BP (up against the ME side of the BP) and have the wing nuts on the side opposite the opening of the valves.

Blister

 

[Jimmer]

Close. Maybe even just semantics.

What I would like to do is run the bolts through the bands so the bolt head is between me and the BP (up against the ME side of the BP) and have the wing nuts on the side opposite the opening of the valves.

Blister

How would you get the tanks off the backplate then?

 

[dl348]

I wouldn't recommend putting the bolts in backwards, either cut the bolts a little shorter or use a threaded rod instead. Just make sure you use SS hardware. I'm assuming you have Highland bands since you purchased the package from Divesports, just out of curiosity what brand backplate do you have. Good luck.

 

[HullBlister]

How would you get the tanks off the backplate then?

By unscrewing the wingnuts and pulling the bolts out.

Something is telling me that I am missing something here.

Should there be a nut threaded down the band bolts to the bands before the BP/W goes on?

The way I have it now is:

1) Bolt through tank bands (from back to front with threaded end pointing at my back)

2) Wing

3) BP

4) Wing nuts

Blister

 

[HullBlister]

just out of curiosity what brand backplate do you have. Good luck.

Dive Rite SS.

Blister

 

[marchand]

WOW!!! the point of the bands it to hold the tanks so that they don't move and ruin your manifold.

It should go like this

1) Bolt
2) Tank bands
3) Nut
4) Wing
5) BP
6) Wingnuts

 

[DANM]

i'm new to doubles, but i think your missing something. you bolt the bands to the tanks and tighten so the tanks are always together, then with the threads that are past the nuts you put those through your wing then through your backplate or transpack, then put the wing nuts on. make sure you have enough thread to catch the wingnuts with washers also, but not to much that when you tighten they are so long that they stick you in the back. i think mine are 5 1/4 inches or 5 1/2 inches long and with the washers are just right for me. someone more experianced may have a better suggestion. good luck, Dan

 

[HullBlister]

WOW!!! the point of the bands it to hold the tanks so that they don't move and ruin your manifold.

It should go like this

1) Bolt
2) Tank bands
3) Nut
4) Wing
5) BP
6) Wingnuts

And therein explains my problem!

Thanks!

Blister