Page 96 (Model J)
16.6 48 month overhaul procedure using N9410/48/G overhaul kit.
The overhaul of the electronic unit follows the same procedure as that of a 24 month
overhaul.
16.6.1 Pneumatic unit 48 month overhaul procedure
Note: Replace any tubing deemed to be brittle, damaged or discoloured. Tubing
should be removed and replaced as the item it is attached to is removed from the
pneumatic unit.
16.6.2 Removal of N0280/03 High Speed Jet Valve Assembly
1. Disconnect the following tubes:
(A) forward jet supply tube
(B) reverse jet supply tube
(C) mean jet delivery tube
2. Disconnect the electrical connectors
from PR3 (D), PR4 (E) and PR6 (F).