Hatsan Hatsan Velox - Mods, Tuning ,Teardown info.

[saridnour]

Hi all.
Wanted to start a thread with info on the Velox as did not see too much, and what was is scattered somewhat.
Some of you have done full teardowns, mods and tweaking and would be great to represent it here to help others, myself included.
I made a new 3d printable stock "Velocity" that has a steel pined reenforced rear cleat. and AR Mil Spec grip..
It allows one to swap it out for collapsible buffer tube , rail or other mounts. Ill post a link later in thread.

Making a list of useful info below, will try to keep it updated as people add to this or qet questions resolved...

You can only get the hammer out if you remove the trigger. Trigger needs to be removed by tapping out the two pin on it's side. Trigger group comes out well intact and stays together. Can get in and clean re-grease/smooth things out if needed easily enough.

Hatsan usa has the exploded diagram on the site. You can look up some of the lower numbered parts online and find descriptions on some of the sites from .pl It lets you get a few O-ring sizes and description of what they are or at least referred to.

You can tunne the hammer spring once the stock is removed. There is a small set screw on the right side that needs be backed out some to free the spring adjuster. This can be adjusted without removing the end cap. An allen wrench can fit on the small hole and reach the set screw. Backing it out TIGHTENS the spring. Do so in SMALL turns IF you feel you need to.

Be careful what you tweak. Take pictures of what you pull apart or count the threads/turns when adjusting rates, positions, etc. These are very picky and small differences can make or break things.


Cheers,
SARidnour

Hatsan Velox "Velocity" stock . Mini carbine adapter.

Hatsan Velox "Velocity" stock . Mini carbine adapter. Final design, early post to Cults. Settings and details/assembly document to follow. .3mf added from Bambu to simply those with this printer type.

cults3d.com

 

[saridnour]

I bought a used Velox and am having some issues with it cycling. I did a full teardown and silicon regrease, "mostly "replaced all O-rings with "like" sizes (trying to order a parts kits for factory rings). I fixed the leak, but have an issue with cycling.
I get 2 shots back to back. Fast enough you can't register them apart, can only tell by mag count. After the 2nd round it does not go to battery with the third. It requires it to be re-cocked for the next round. It's not doubling up in the barrel. Not too sure what's going on with it. Questioning if its free flowing through a cycle with the blowback causing the second round to get chambered and blown free on a single pull.. but not sure that can happen.

I've tried high and low settings with the hammer spring with same effect, Adjusted the cocking piston forward and back on threads (same effect). Regreased everything (over greased?). Im not getting any air out of the bottom valves Allen bolts. Pressure is full for all testing and seems taper fast but normal?. Not too sure where or what else to test, tweak or replace. Anyone have any clues on what might be happening here? Any thoughts to rule anything in or out?