Graco 332339B important safety instructions Reassemble the Lower

Repair

Reassemble the Lower

1.Install the manifolds (19, 20) on the cylinder (1). Lubricate the o-rings (21) and ensure they are in place on the mating surfaces. Apply thread adhesive to the screws (26) and torque to 13–23 in-lb (1.5–2.5 N•m).

2.Lubricate the o-rings (33). Apply thread lubricant and install the adapters (27) and o-rings (33) on the cylinder (1). Connect the inlet (29) and outlet

(28)tubes at the cylinder (1).

3.Lubricate the o-rings (22, 24). Install the o-rings (22), seats (23), and o-rings (24) in the manifolds (19 and 20). Apply thread lubricant and screw the dosing valves (25) into the manifolds. Torque to 20–30 ft-lb (28–40 N•m).

4.Lubricate the piston packings (16) and o-ring

(42).Assemble the piston on the lower rod (2b) as follows:

a.Install one washer (12) and the bottom (shorter) spacer (13).

b.Install one packing (16) on each shoulder of the piston bearing (14), with the lips facing away from the bearing. Install the piston bearing (14).

c.Install the o-ring (42), the top (longer) spacer (15), and one washer (12).

Figure 13 Piston Rod Assembly

5.Apply thread adhesive to the male threads of the lower rod (2b). Screw the upper piston rod (2a) onto the lower rod, using the flats on both ends. Torque to 35–45 ft-lb (48–61 N•m).

6.Insert the piston rod assembly into the cylinder

(1) from the bottom. Push the rod up until it protrudes from the top of the cylinder (1).

NOTE: The 70 cc lower 24T793 includes two u-cup packings (10) in the lower throat cartridge; the 35 cc lower 24T792 includes only the upper one.

7.Lubricate the o-rings (7) and packing(s) (10). Place the upper packing (10) into the tool (T) included with the seal kit. The lips of the packing must face out of the tool. Insert the tool into the lower throat cartridge (4). Push on the tool’s shaft (P) to seat the packing securely in the cartridge. When seated, the lips of the packing will be facing up. Install the bearing (11). On 70 cc lowers only, install the second packing (10) with the lips also facing up.

Figure 14 Lower Throat Assembly

14 332339B