Graco Python A25115 Instructions - Parts Manual page 34

Repair
7. The stack of seal cartridge components includes
four sets of seals (105) and o-rings (124). Inspect
and replace these as necessary. The repair parts
from Graco come as a piston assembly with the
seals factory installed.
F . 23 Seal cartridge
IG
8. Remove the drive piston (107) from the upper hous-
ing (110) with a needle-nose pliers.
NOTE: Keep the seal (108) and piston (107) together.
F . 24 Remove timing valve piston
IG
9. Inspect the seal (108) and piston (107), and replace
if necessary. The repair parts from Graco come as a
piston assembly with the seals factory installed.
34
10. Remove the control knob (122) by loosening the two
124
105
102
105
124
110
108
107
F . 25 Remove timing valve knob assembly
IG
11. Remove the knob control spring (120) and the
12. Remove the needle valve (117) by unscrewing it
13. Clean and inspect all parts before reassembly.
14. Apply a thin coat of grease to the o-ring (118) and
15. Install the retaining ring (119) and knob control
hex set screws (123) with a 1/16" hex key wrench.
122
123
120
119
117
118
110
retaining ring (119).
from the housing (110). Inspect the sealing o-ring
(118) and replace as necessary.
reinstall the needle valve (117). Tighten needle fin-
ger tight.
spring (120).
3A4386E