Cause / 305

1. Leak in air valve. 2. Air leak in fill plug. 3. Air leak in line from vavle to cyclinder. Air leak in outer casing. 4. Leak at manual air bleed screw.

Repair / 305

1. Check exhaust port, repair or replace. 2. Apply soapy water and watch for bubbles after letting air into system. 3. Check thoroughly first to be sure, then repair or replace. 4. Tighten or replace.