) 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
: Many enthusiasts recommend upgrading from the factory seal to an aftermarket option like an , , or for better performance. ) and a to repressurize the system afterward
: 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 a scraper ring
Before you start, ensure you have a clean workspace and the following items:
Restoring the Punch: A Step-by-Step Guide to Resealing Your Weihrauch HW90 Weihrauch HW90