Graco Airlessco PRO-DUTY Series Repair Manual page 13

10. Thread intake valve housing into
cylinder to dimension shown.
11. Tighten packing nut. Torque to 70 ± 10
in.-lb (8 ± 1 N•m) or additional 1/2 turn
from hand tight.
12. Install the button plug on the piston rod
at the top of the pump.
3A4347D
Throat and Piston Packing
Adjustment
1.895 in.
(48.1mm)
± .010 in.
(.3mm)
When pump packings begin to leak after
much
Procedure, page 5.
Turn electric sprayers OFF and unplug from
power source.
Turn engine driven sprayers OFF.
Tighten packing nut and intake valve housing
down an additional 1/2-1 turn. This should
stop
approximately 50 gallons of additional
operation before a repacking is required.
This equipment stays pressurized until
pressure is manually relieved. To help
prevent serious injury from pressurized
fluid, such as skin injection, splashed fluid
and moving parts, follow the Pressure
Relief Procedure whenever sprayer is
stopped and before sprayer is cleaned or
checked, and before equipment is
serviced.
use, perform
or lessen
Repair
Pressure Relief
OR
leakage. This allows
13