Service; Automatic Flow Gun Disassembly - Graco C27130 Instructions-Parts List Manual

Service

Service
Automatic Flow Gun
Disassembly
This procedure describes how to disassemble the auto-
matic flow gun. Refer to the Parts information on the
applicable pages while performing the disassembly pro-
cedure.
Model
C27130
C27134
C27132
C27151
NOTE: Models C27130 and C27134 are shown in Fig.
1. The service procedure is basically the same for all
flow gun models, except where differences are noted.
To disassemble the flow gun, follow this procedure:
1. Follow the Pressure Relief Procedure on page 5 to
relieve the pressure and purge material from the
gun.
To reduce the risk of serious injury, whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5. Also, wear
eye protection, gloves and protective clothing when
operating or servicing this flow gun.
2. Shut off fluid and air supply lines to the gun.
3. Disconnect the fluid and air supply lines from the
gun.
4. While holding the gun body (16) stationary, remove
the following parts from the gun body. See Fig. 1.
Model C27151: Remove the collar (18) and valve
seat (19). Remove the adjustment screw (1), nut (2),
and end cap (10).
All other models:
a. Remove the collar (18), nozzle (19), and washer
(9).
b. Remove the cylinder cap (10) with the fiber
washer (1).
6
5. From the nozzle end of the gun, tap the needle (17)
6. Pull the piston (11) and needle (17) from the gun
Page
9
10
10
11
7. Remove the internal parts from the gun body (16) as
lightly with a soft rod or dowel until the piston (11) is
exposed at the rear of the gun body (16).
body (16). Model C27132: Remove the spring (20).
Disassemble the piston and needle as follows:
Model C27151: Remove the spring (4). Pull the pis-
ton (11) and needle (17) from the gun body (16).
Remove the cup (12) from the piston (11). Remove
the piston (11) from the needle (17).
All other models:
a. Remove the lock nut (2), washer (3), and piston
packing (4) from the needle (17).
b. Remove the quad ring (12) from the piston (11).
c. Remove the piston (11) from the needle (17).
follows:
Model C27151: Follow steps a--d below. Skip step
e.
All other models:
a. Using a deep well socket wrench, remove the
packing nut (5). Remove the o-ring (7) from the
packing nut.
b. Using an o-ring pick, remove the packing
washer (15) from the gun.
c. Using an o-ring pick, remove the two seals (13)
from inside the packing nut (5). Remove the
o-rings (14) from the seals.
d. Using an o-ring pick, remove the o-ring (6) from
the o-ring groove in the packing nut (5).
e. From the cylinder cap end of the gun, tap the
seal (8) in the nozzle end of the gun body (16)
lightly with a soft rod or dowel.
310547C