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310692C 21
4. Unscrew the packing screw (8) from the insert (4)
with the gun tool (28).
5. Using a mechanical pick, push the three fluid pack-
ings (5, 6, 7) out of the insert (4). Be careful not to
damage the insert. Discard the old fluid packings.
6. Place the new fluid packings (5, 6, 7) and packing
screw (8) onto the needle (13). Note the orientation
of the parts.
7. Insert the fluid needle (13) into the back of the insert
(4) to install the fluid packings (5).
8. Tighten the packing screw (8) just enough to hold
the packings (5) in the insert (4). The needle (13)
must move freely. Remove the needle.
Replacing the pattern adjustment valve
packings
1. Unscrew the pattern adjustment valve assembly (25
A-D).
2. Using a needle nose pliers, remove the retaining
ring (25D) and unscrew the pattern adjustment
valve (25C).
3. Using a mechanical pick, remove the u-cup pack-
ings (25B) from the pattern adjustment nut (25A).
Be careful not to damage the seal surface or the
nut's internal threads.
4. One at a time, install the new u-cup packings (25B)
with the packing installation tool (29); the u-cup lips
must face toward the tool.
5. Push each u-cup packing (25B) into the pattern
adjustment nut (25A) until a definite snap is felt.
6. Lubricate the pattern adjustment valve (25C)
threads and install the valve into the nut (25A).
Install the retaining ring (25D), then back out the
pattern adjustment valve as far as the retaining ring
allows it to go.
F
IG. 29
F
IG. 30
7
5
4
6
8
7
ti4834a
5
4
6
8
13
F
IG. 31
F
IG. 32
ti4857a
25C
25A
25B
25D
29
25A
25B
ti4834a