GUSMER GX-8, Operating Manual, Page: 26 / 32

Model GX-8 Spray Gun
26 32943-1, Issue 1
5. REMOVE SCREW- Using the 9/64” Ball Point Hex Key remove the rear #8 Socket
Head Screw that connects the Air Cylinder to the Handle. Remove only this screw.
End Cap/
afety Stop
Assembly
#8 Socket Head
Cap Screw
Retaining Ring
Piston
Spring
Figure 15. End Cap/Safety Stop Assembly Removal
6. REMOVE THE RETAINING RING- Using the Retaining Ring 45º Pliers remove
the Retaining Ring, which holds the End Cap in place in the Air Cylinder.
7. REMOVE THE END CAP/SAFETY ASSEMBLY- Remove the End Cap and retain
the Piston Spring located inside of the Air Cylinder for future use.
NOTE:
Removing the End Cap will
require some force since the
O-Ring is tightly compressed
8. INSPECT THE END CAP O-RING- Inspect the O-Ring. If necessary remove it and
install a new O-Ring after lightly coating it with Lubriplate Grease.
9. REMOVE THE SAFETY STOP MECHANISM- Using the 5/64” Hex Key remove
the two set screws from the knurled knob. Slide the knob off the shaft and retain the
shaft spring. Pull the shaft out of the End Cap.
10. REPLACE CUP SEAL- Remove and replace the Cup Seal located in the End Cap if
necessary. Lubricate the new cup seal and install it making sure to that the “cup” is
facing the air cylinder.
11. REINSTALL THE SAFETY STOP MECHANISM- Insert the shaft into the hole in
the End Cap. Slide the shaft spring and knob onto the shaft. Using the 5/64” Hex
Key reinstall the two set screws in the knurled knob. Make sure the knob is secure.
12. REASSEMBLE THE END CAP/SAFETY STOP ASSEMBLY/PISTON SPRING-
Center the Piston Spring over the raised portion of the Piston. Line up the raised
portion of the End Cap with the inside diameter of the Piston Spring and insert the
End Cap into the Air Cylinder. Press the End Cap until it moves past the undercut
groove in the Air Cylinder. This groove is where the Retaining Ring nests. Maintain
force on the End Cap, making sure the groove remains visible, and install the
Retaining Ring using the Retaining Ring 45º Pliers. Reinstall the #8 Socket Head
Screw.
WARNING: I
NSERT THE
R
ETAINING
R
ING COMPLETELY INTO THE GROOVE SO THAT THE END
CAP WILL REMAIN IN THE
A
IR
C
YLINDER WHEN THE GUN HAS AIR PRESSURE APPLIED TO IT
.
K
EEP CLEAR OF THE CAP WHEN FIRST REAPPLYING AIR PRESSURE OR TRIGGERING THE GUN
AFTER REASSEMBLY IN CASE OF IMPROPER
R
ETAINING
R
ING INSTALLATION
.