Graco 16T311, 16P957 Assemble Piston Rod Seal and Bearing, Disassemble Ram Piston

Repair

Assemble Piston Rod Seal and Bearing

See FIG. 18 on page 20.

1.Lubricate o-ring (302e) and bottom bearing (302k).

a.Install o-ring (302e), bottom bearing (302j), and retaining ring (302l) into end cap (302b).

b.Install new o-ring (302d) and pin (302c) on end cap (302b). Lubricate o-ring (302d) and end cap (302b).

c.Slide spring (302m) and end cap (302b) on pis- ton rod (302a).

2.Install retaining ring (303).

3.Remount mounting plate (331) and attach nuts (333) and lockwashers (332). Torque to 40 ft-lb (54 N•m).

Disassemble Ram Piston

1.Complete steps 1-4from Disassemble Piston Rod Seal and Bearing to remove the end cap (302b) from the piston rod (302a).

NOTICE

Do not tilt the piston rod to one side when removing it from the base or when installing it. Such movement can damage the piston or inside surface of the base cylinder.

2.Carefully lay piston (302f) and rod (302a) down so piston rod will not be bent. Remove nut (302g), washer (302h), piston (302f), outer o-ring (302d), and inner o-ring (302j). See FIG. 19.

3.Inspect parts for wear or damage. Replace as nec- essary.

302a

302d

302f

302j

302h

302g

TI10521A

FIG. 19: 3 in. Ram Piston

Assemble Ram Piston

1.Install new o-rings (302d, 302j) and lubricate piston (302f) and o-rings.

2.Apply medium strength thread sealant. Install piston (302f), washer (302h), and nut (302g) on pis- ton rod (302a).

3.Carefully insert piston (302f) into cylinder and push piston rod (302a) straight down into cylinder.

4.Slide spring (302m) and end cap (302b) onto piston rod (302a).

5.Install retaining ring (303).

6.Remount mounting plate (331) and attach nuts

(333)and lockwashers (332). Torque to 40 ft-lb (54 N•m).

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