Graco Airlessco PRO-DUTY Series Repair Manual page 11

a. Drop the ball into the piston.
b. Insert O-ring into piston body.
c. Insert seat into piston. Make certain
seat chamfer faces ball and o-ring.
d. Apply Blue Locktite® 242 to threads
of seat retainer and install in piston.
When thread sealant is applied to
piston valve threads, ensure that
none gets on the ball.
3A4347D
e. Torque to 175 ± 15 in.-lb (20 ± 2
N•m).
3. Assemble upper-throat packing stack.
Use leather throat packings soaked
earlier alternating with white V-pack-
ings. Install from the top of the cylinder
(lips face in).
4. Using a hammer with a socket or round
bar stock to tap upper throat packing
into pump cylinder.
Repair
11