Graco 312068M important safety instructions Pump Base Disassembly, Pump Base Reassembly

Repair

Pump Base Disassembly

Disassemble and clean pump base annually. For pumpline P7758-255773, disassemble and clean the pump base on every six months.

1.Relieve pressure, page 3.

2.Turn OFF the main disconnect and lock out power at the source.

3.Remove pump cap (19) from pump base (23), and remove o-ring (6):

a.Remove outlet ball (4) and o-ring (9).

b.Remove inlet ball cage (14), spring (22) and inlet ball (10).

c.Remove inlet ball seat (11) and o-ring (9) from bottom of cavity.

19

6

4

9

14

22

10

11

9

23

TI9780b

d.Thoroughly clean all metal parts in a compatible solvent and inspect for wear or damage. Inspect each ball and seat for nicks or scratches; replace as required.

e.Replace all o-rings. Kit 261859 contains all o-rings for pump base rebuild.

Pump Base Reassembly

1.Install inlet valve in pump base by inserting o-ring (9), inlet ball seat (11), ball (10), spring (22), and inlet ball cage (14) into pump base cavity. See Parts on page 15.

2.Install outlet valve in pump base:

a.Install o-ring (9) and valve ball (4) into the cavity.

b.Install the o-ring (6) on pump cap (19). Install and tighten cap to pump base. Torque to 75 ft-lb (101.3 N•m).

6 312068M