Gauge Assembly & Disassembly - Cygnus 1 Operation Manual

GAUGE ASSEMBLY & DISASSEMBLY
Fitting the Probe-module
Fit the two O-Rings, A and B, then attach the Probe-module to the Gauge-body :
Cover both O-Rings with a light coating of Dow Corning Molykote, then fit as shown in
the diagram below
A is fitted into the O-Ring groove in the Nose-cone housing
B is to be fitted in the O-Ring groove at the front of the instrument
Ensure that the O-Rings are properly located
There is no need to stretch or force the O-Rings into their locations
Screw the Probe-module onto the Gauge-body, hand tight.
Do not use the Nose-cone torque bar to tighten.
Only use the torque bar to undo the Nose-cone after a dive : both O-Rings should be
discarded after each dive.
Both O-Rings must be replaced after every dive
See : Care of the Cygnus 1 ROV Underwater Gauge section on page 81
All parts are designed to ensure a good water-tight fit : incorrect fitting will result in
the instrument leaking.
Installing the Gauge
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