Graco 3A0019J important safety instructions Pump Disassembly

Pump Disassembly

1.Relieve pressure and flush system. See Pressure Relief Procedure and Flushing, page 7.

2.Remove inlet hose and drain inlet housing (7).

3.Horizontally clamp pump on outlet housing (7) in vise, use 1/2 in. hex bit socket to loosen all four tie bolts (5) from inlet housing (6).

clamp here clamp here

6

21

5

7

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4.For 40cc and 50cc pumps only: Use wrench to remove rod adapter (21).

5.Remove pump assembly from vise and lay on a flat surface with towels or in catch pan.

6.Fully unthread and remove tie bolts (5).

5

6

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Repair

7.Remove inlet housing (6) from main cylinder (3). Remove crossover tube (4) and o-rings (2).

2	4	6
		2

21 15

3

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8.Pull main cylinder (3) and displacement rod (15) away from outlet housing (7).

NOTICE

Be careful not to scratch the displacement rod (15); place it on a smooth working surface. Damage to the displacement rod will shorten pump life.

9.Remove displacement rod (15) from cylinder (3).

3

15

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10. Remove two o-rings (1) from main cylinder (3).

1

1

3

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11.Place outlet housing (7) in vise so throat cartridge

(18)is facing up.

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