Salvimar Krypsis 75

[Rotel]

I bought Salvimar Predathor Krypsis 75 pneumatic speargun in may 2024 via Diveinn.com

and I was quite happy with it until today when I simply failed to load the speargun

I could not fix firmly the spear inside the tube .

It fails to stay in.

Anybody faced with such problem ? Can I do something by myself or need professional service ?

Thanks for reply

 

[popgun pete]

When you say fail to stay in is this with the gun cocked and the piston latched in the gun? Are you in the water at the time? The spear stays in the gun with the spear tail jammed in the nose of the piston and is held there by what is referred to as conic friction. For the spear not to stick there is possibly something inside the piston, so you need to take a look at it. The nose of the muzzle screws off, so remove it and then pull the vacuum cuff out in order to take a better look at it. If the piston is damaged then the gun needs to be depressurized fully, the muzzle body unscrewed and the piston pulled out of the gun and replaced with a new one. But don't do that until you are sure you have found the source of the problem is actually a broken or cracked piston. Possibly the vacuum seal has torn and a piece of it has stuck in the piston nose. When releasing all the air from the gun the power selector must be set to full power which means down and forward in the selector gate.

A blast from a hose water jet directed into the muzzle may be worth trying to see if anything can be flushed out.

 

[Rotel]

I was in the water and tried to reload the gun. I felt normal resistance of air pressure when I pushed the spear down to the muzzle but in the end instead of being hitched up and left in standby position the spear was not fixed inside and was being pushed out by air pressure.

There was no "click" inside which would indicate that the spear hitched up.

So I can say the gun could not be cocked.

Vacuum seal in perfect condition and the muzzle is clean.

 

[popgun pete]

Well now we know a bit more, so you are saying the piston is not latching and is pushing the spear out. Inside the gun the sear lever is like a single-piece trigger and once the piston pushes the front tooth down it is snapped back up to hold the piston's mushroom tail by a coil spring that biases the sear lever downwards at the rear which lifts the tooth up. Either that coil spring has tipped over or the trigger is not returning to the normal position and is still holding the back of the sear lever up. The latter is unlikely as air pressure in the gun pushes the transmission pin down and that forces the trigger back to its pre fire position. It is unusual for the coil spring to tip over unless it was not properly installed in the first place.

 

[popgun pete]

To get the coil spring back in position the gun has to be taken apart. With the gun so new it will still be under warranty, so you could ask Salvimar to do it and it should not cost you anything as this is a problem created by them. You could do it yourself, but you need some mechanical aptitude to do it and although the guns are not that complicated it is easy to ruin them if you don't know what you are doing. A special tool is needed to undo the inlet valve body which allows the back end of the gun to be taken apart, Salvimar sell that tool, but you will need a few other tools to do the work like a small hammer and pins to use as drifts when knocking pins out of the gun and a few spanners.

 

[popgun pete]

Salvimar may have a service centre in your country, but you don't say where you are. With a local agent the gun does not have to go back to Dive Inn, but you could always ask them first and see what they say. I have only known of a handful of cases where that spring has tipped over. A check would be to release all the air in the gun and then try the trigger. If it still pushes back when you pull it the spring should be OK, but if it doesn't then the spring has fallen out. That is with zero air in the gun.

 

[Rotel]

Thank you very much for detailed explanation and advice. I am in Athens (Greece). Already sent email to Salvimar headoffice in Italy ( service@salvimar.com) and waiting for their reply. Definitely prefer specialist attention because I never repaired pneumatic speargun.