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REPLACEMENT PROCEDURES (continued)
4.17.42 Remove the muffler/silencer (white tube) from the intake flange at
the interface wall by turning the muffler counter-clockwise.
4.17.43 Disconnect the press-on clamp and small diameter tubing from the
left side hose barb on the ventilator solenoid valve (port labeled
"out").
4.17.44 Disconnect the compression fitting at the outboard end of the copper
tube from the valve case assembly.
4.17.45 Unscrew the bellows adjustment rod tube from the top of the
assembly. Do not misplace the spacer ring.
4.17.46 Pull the bellows adjustment rod up.
4.17.47 Remove the two screws securing the valve case and guide assembly
to the bellows top plate.
NOTE:
4.17.48 Pull both large diameter tubes forward until they clear the muffler
housing interface wall.
4.17.49 Rotate the valve case and guide assembly as needed in order to
withdraw it from the bellows box.
CAUTION: Do not damage any of the fittings or small hose barbs on
4.17.50 Transfer the large diameter tubing and hose clamps to the intake and
exhaust ports on the replacement valve case and guide assembly.
4.17.51 Carefully position the replacement valve case and guide assembly in
the bellows box, with the copper tube extending up into the ventilator
box, and with the intake and exhaust hoses correctly positioned in the
muffler housing interface wall.
4.17.52 Secure the valve case assembly to the bellows top plate with the two
screws that were previously removed. Be sure that the spacer ring
and the two O-rings in the bellows top plate are properly seated.
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Be careful not to misplace the two O-rings and the spacer
ring under the valve case assembly.
the assembly during its removal.
4-64
NM3
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Troubleshooting
