Brother GTX-4 Service Manual page 285

(4) Remove the connection of the fitting on the head side.
Attach a fitting (the one attached with a new tube) to the fitting-detached portion to prevent the ink from leaking.
(5) Detach the tube from the tube clamp.
<CAUTION>

When detaching the tube from the tube clamp (SB5380), avoid bending the tube as much as possible.
<TIPS>

The operation of Step 5 through 9 describes the replacement procedures for W1 but also applies to other tubes.
K Y C M W1 W2 W3 W4 W4 W3 W2 W1
(6) Detach the fitting.
Attach a fitting (the one attached with a new tube) to the fitting-detached portion to prevent the ink from leaking.
6
Release the lock and
lift upward.
Disassembly / Replacement / Adjustment
Attach the fitting.
Attach the fitting.
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