Hw90 - Reseal

: Includes the necessary O-rings (typically two OR066 and two OR070), a scraper ring, and a new Schrader valve. Replacement Piston Seal

Restoring the Punch: A Step-by-Step Guide to Resealing Your Weihrauch HW90 Weihrauch HW90 HW90 Reseal

: Use Krytox or high-quality Moly grease . Avoid synthetic engine oils that can cause O-rings to swell. Specialty Tools : You will need a Gas Ram Charging Pump (like the : Includes the necessary O-rings (typically two OR066

Never attempt to disassemble a pressurized gas ram. a scraper ring

If you’ve noticed a drop in power, a "slammy" shot cycle, or if air escapes when you remove the rear port screw, it's time for a reseal. Here is a comprehensive guide to getting your HW90 back in peak condition. Essential Gear for the Job