Changing O-ring on Lid of Pump-Up Chamber

Changing the o-ring on the pump up chamber PMS Instruments

To change the O-ring on the lid of your Pump-Up Chamber (either Large or Small sealing system)

You will need:

#Extra Buna 70 O-ring size (223)
#Probe, large needle or pocket knife
#O-ring lubricant (Petroleum Jelly)

Changing the o-ring on the pump up chamber PMS Instruments

First, use a probe or needle to remove the old O-ring.

Changing the o-ring on the pump up chamber PMS Instruments

Pull the O-ring off.

Changing the o-ring on the pump up chamber PMS Instruments

Use a rag to clean the O-ring track of old lubricant and debris.

Changing the o-ring on the pump up chamber PMS Instruments

Take the new O-ring and pull it lightly onto one end.

DO NOT stretch the O-ring longer than necessary as it will cause

the O-ring to seat too far into the groove and will not seal well.

Changing the o-ring on the pump up chamber PMS Instruments

Loop the O-ring over the other end of the groove.

Changing the o-ring on the pump up chamber PMS Instruments

Use a pencil or flat long object to press the O-ring into place.

Changing the o-ring on the pump up chamber PMS Instruments

The O-ring should be evenly distributed on all sides.

If it is not – reset the O-ring so it is evenly distributed and will make contact with inside of chamber on all sides.

Changing the o-ring on the pump up chamber PMS Instruments

Make sure the O-ring was not pulled too tight onto either end.

Changing the o-ring on the pump up chamber PMS Instruments

Lubricate with Petroleum Jelly. – The lid is now ready for use.