Hw90 Reseal ★ Validated

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

) and a to repressurize the system afterward. Step 1: Depressurize and Disassemble

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

: Many enthusiasts recommend upgrading from the factory seal to an aftermarket option like an , , or for better performance. Restoring the Punch: A Step-by-Step Guide to Resealing

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

is a powerhouse in the air rifle world, famous for its unique . Unlike a standard spring-piston rifle, the HW90 uses pressurized air as its powerplant. While this makes for a smoother, more adjustable shot cycle, it also means that once those internal seals fail, your rifle becomes a very heavy paperweight. Avoid synthetic engine oils that can cause O-rings to swell

Before you start, ensure you have a clean workspace and the following items: