Graco A Series Instructions Manual page 16

Repair
a. Component A (ISO) Pump:
• Install spring (25) in the wet-cup (19).
• Install o-rings (24*, 26*) on the piston (28) and
insert the piston in the wet-cup.
• Compress the piston (28) into the wet-cup,
using a 1/2 in. (13 mm) x 2.5 in. (64 mm) bolt
with washers and nut.
• Install the retaining ring (22*) in the groove.
• Remove the bolt, washers, and nut.
• Install the o-ring (27*) on the wet-cup.
• Install the packing wet-cup assembly handtight.
Screw the assembly all the way down, so the
external o-ring (27) seats on top of the cylinder
(2).
28
25
19
b. Component B (Resin) Pump:
• Install felt washers (21*) into the packing nut
(19).
• Install the retaining ring (22*).
• Install the packing nut handtight.
16
NOTE: The groove (H) in the sleeve outer surface must
be toward the bottom.
6. Lubricate the piston u-cup and sleeve top edge.
22*
7. Lubricate the top 1-2 in. (25-50 mm) of the
24*
26*
27* 8. Slide the sleeve into the bottom of the cylinder (2).
2
TI3735b
22*
21*
19
TI2701A
Push the piston assembly into the top of the sleeve
(4). Drive in with a non-sparking hammer.
H
displacement rod (1) and outside of the sleeve (4).
Grease the o-rings (3*) and place one in the cylinder
and other on the bottom of the sleeve.
Drive in with a hammer until the top of the groove
(H) aligns with the bottom of the cylinder (L). Use a
plastic rod to drive the displacement rod until 1/4-3/8
in. (6-10 mm) of its greatest diameter is visible
above the packing nut (19).
*3
L
H
4
TI2673A
19
2
4
3*
TI2674A
309577T