Replacing the valve disc and O-ring in the surplus valve
- If necessary, remove any defective valve disc, 88 396-951, and O-ring, 88 394-951.
- Lubricate the new O-ring with Krytox and fit.
The O-ring is pressed in place.
- Fit a new valve disc over the little knob as shown in the figure.
The valve disc is flipped in place.