Replace Chamber Cup Seals
The chamber plug is sealed into the high pressure chamber by means of a cup seal and a backup ring. There is also an O-ring in the vent valve. See Replace the Vent Valve O-ring.These rings should be checked monthly and replaced when the backup ring extrudes, small slivers come from the cup seal or backup ring, or pinched areas appear on the cup seal. The rings may also need replacing when oil appears around the top of the chamber or when it is difficult to maintain pressure in the high pressure chamber
- Remove the chamber cup seal and backup ring without scratching the surrounding surfaces.
- Replace the backup ring on the lower portion of the chamber plug with the backup ring uppermost and with the groove of the cup seal downward.
- Replace the O-ring in the vent valve.
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