Graco Inc. Series B - Manual (Page 15)

15 307741
Service
NOTE: Refer to Fig. 7 for steps 6 to 10.
6. Grease the trip rod (40) with light, water-proof
grease and slide it into the piston (34) shaft. Clean
the threads of the piston and the connecting rod
stud (39). Apply Loctite
R 242 or the equivalent to
both. Screw the stud into the piston and torque it
to 200–220 N
S
m (148–162 ft-lb).
7. Place the cylinder (36) upside down on the base
(47). Grease the piston (34), o-ring (33*), and
inside of the cylinder. Place the o-ring around the
piston; the o-ring is larger than the piston groove.
Install the piston in the cylinder so the excess of
the o-ring fits into one of the air channels (M) of
the cylinder. Use your fingers to push the o-ring
out of the channel and seat it in the piston groove.
Very carefully lower the piston into the cylinder.
8. Regrease the inside of the cylinder (36). Carefully
turn the piston assembly and cylinder over and
guide it into the base (47). Align one of the cylin-
der’s air channels (M) with the notch (K) in the
gasket (35) and with the optional fluid outlet (L) of
the base. Install the lockwashers (13) and screws
(31) and torque to 34 N
S m (25 ft-lb).
9. Install the backup washer (64*) and v-block pack-
ing (65*) in the bearing (37) so the lips of the
packing face out of the bearing. Install the gasket
(66) on the bearing. Grease the trip rod (40) and
thread the bearing onto the trip rod and into the
cylinder (36). Use a 1 in. deep-well socket wrench
to tighten the bearing.
10. Install the rubber pad (8) in the cylinder (36).
Fig. 7
1
3
4
2
Grease with light, waterproof grease.
Align air channel (M) and notch (K) in gasket (35)
with the optional fluid outlet (L) in the base (47).
Apply Loctite r 242 or equivalent to threads.
Torque to 200–220 N S m (148–162 ft-lb).
Grease inside wall of cylinder.
5
6
7
Torque to 34 N S m (25 ft–lb).
Lips must face down, out of bearing (37).
07283A
8
37
66
64*
65*
36
13
31
34
47
40
03701
40
39
34
33*
M
K
L
1
2
2
3
1
1
4
5
6
7
7
7