Graco 256200 important safety instructions Pump Lower Reassembly, Series a and B

Pump Lower Reassembly

1.Lubricate packing (17) and bearing (18) with no. 2 lithium-based grease.

2.Install the bearing (18), and cup packing

(17)with the lips facing down on the pump connecting rod (37). See FIG. 18.

3.Lubricate the piston seals (21) and bearing

(22)with no. 2 lithium-based grease. Install one piston seal (21) with the lips facing down, bearing (22), and second piston seal

(21)with lips facing up on the piston (23). Install the backup washer (20) with the grooves facing down. See FIG. 17 on page 18.

4.Place the ball (3) on top of the piston body

(23)and screw the piston body and the fluid piston rod (19) together. Torque to

30-35 ft-lb (41-48 N•m). Screw the piston valve housing (29) onto the lower connect- ing rod (19). See FIG. 17 on page 18.

5.Install the seal (51), with the lips facing down, in the displacement pump frame (36), then install bearing (31).

	36
31	51

TI17181a

FIG. 19

Repair

Install seal (51) from the bottom of the pump frame (36) with insert tool 24B917.

6.Use a turning motion to maneuver and install the pump connecting rod (37) and piston back into the pump frame (36). See FIG. 14 on page 17.

7.Install piston cylinder (58).

a.For Series A and B Pumps: Support the pump frame (36) with a strap wrench. Lubricate o-ring (57) lightly with grease and apply loctite to threads of pump cyl- inder (58). Torque to 10-15 ft-lbs (13.5-20 N•m).

36

57

58

TI21638b

FIG. 20: Series A and B

b.For Series C Pumps: Support the pump frame (36) with wrench flats. Lubricate o-ring (57) lightly with grease and apply loctite to threads of pump cylinder (58). Torque to 30-35 ft-lbs (41-48 N•m).

36

57

58

TI21637a

FIG. 21: Series C

312766N 19