20
Service
Replacing the spray housing o–rings
and packings
Fig. 23
1
4
2a
2b*
5*
8
9
11
12
14
15
18
34*
15b*
17
10
1.
With the spray housing (2a) removed from the
adapter (4), use a mechanical pick to remove the
o-ring (2b) from the housing (2a).
2.
Remove o–ring (34) from the adapter (4). See Fig.
23.
NOTE:
O–ring (2b) is slightly larger than o–ring
(34).
3.
Install a new o–ring (34) into the adapter (4). Install
a new o–ring (2b) into the housing (2a).
NOTE:
To ease o-ring installation, place the adapter
(4) into the spray housing (2a) to plug the end. Install
one end of the o-ring into the groove in the housing,
then press the rest of the o-ring into place.
4.
Unscrew the packing screw (8) from the adapter
(4) with the gun tool (28).
5.
Using a mechanical pick, push the three fluid
packings (5) out of the adapter (4). Be careful not
to damage the adapter. Discard the old fluid pack-
ings.
6.
Place the new fluid packings (5) and packing
screw (8) onto the needle (13). See Fig. 24 for the
orientation of the parts.
Fig. 24
5*
8
7.
Insert the fluid needle (13) into the back of the
adapter (4) to install the fluid packings (5).
8.
Tighten the packing screw (8) just enough to hold
the packings (5) in the adapter (4). The needle
(13) must move freely. Remove the needle.
