39 2 | Graco Inc 307741, 237000, 235525, 220106, 03695A manual

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 LoctiteR 242 or the equivalent to both. Screw the stud into the piston and torque it to 200–220 NSm (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 NSm (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).

1Grease with light, waterproof grease.

2Apply Loctiter 242 or equivalent to threads.

3Torque to 200–220 NSm (148–162 ft-lb).

4Grease inside wall of cylinder.

34 1

33* 1

5Torque to 34 NSm (25 ft–lb).

6Lips must face down, out of bearing (37).

7Align air channel (M) and notch (K) in gasket (35) with the optional fluid outlet (L) in the base (47).

64*

65* 6

4 36

40 1

M 7

K 7

13 31 5

39 2 3

03701

L 7

07283A

Fig. 7

307741 15