Use a vice to remove the hammer weight. Don’t just slap your hammer in a vice or grab it w/ pliars either. You must not damage the shaft or the brass fitting on the end of your hammer plunger. There are ways to get it off, namely drilling a hole in a wooden dowel rod, and cutting it in two and putting the halves on each side of the brass fitting and putting it in the vice while removing the hammer weight w/ a wrench. You may need to heat it a little as they are RED loctited from the factory. This is not 100% necessary unless you are replacing bumpers, etc. You can, in most cases stretch an 010 oring over the tophat bumper stop that is inside the cartridge.
With the hammer weight removed you can now remove the parts from the shaft. It will look like this. *YOU will more than LIKELY need these parts if you plan on SELF INSTALLING the BALANCED VALVE*
Make sure the tail oring on the shaft is in good condition. If it is not, it can vent through the solenoid and mislead you to believe you need a new solenoid. It can also lead to inconsistency. I have removed mine and inspected / replaced it.
Clean the inside of your cartridge w/ a q tip. Make sure you clean it out good. DO NOT USE ANYTHING METAL TO STICK IN THIS PART. If you score it……you will more than likely cause it to leak or need to be replaced.
Now reassemble in reverse order. It should look like this when complete. Apply a generous amount of AKA lube on the tail oring on the shaft, and the oring that seats inside the cartridge cap. They are both UR70 010 orings. They need to be lubed good.
Apply a small drop of blue loctite on the cartridge cap and the shaft threads where the hammer weight screws in. Do not over tighten when reassembling.
Put AKA lube on the outer catridge orings and reinstall into the gun. Air it up to ensure no leaks. Fire a few shots. Then I suggest letting the loctite dry for several hours before going out and ripping on it.
After replacing orings to the cartridge, use your tool kit gauge and increase your LPR pressure to 75-80psi or so (even 85 if you wish). You will need to go through the break in period again. You can turn your LPR back down to 65-70psi after you break it in for several cases. If you don’t, your gun will be inconsistent and probably have FSDO until it gets broken in well.