Graco Inc 307-730, PT2000, 218938, 223660 manual Priming Valve & Tube See Fig, Suction Tube

Diaphragm (See Fig 14.)

CAUTION

Replace the diaphragm whenever you remove the pump housing (9), or after each 100 hours of use, whichever comes first. During use, small grooves are formed in the diaphragm which cannot be re- aligned properly. Reusing a diaphragm may cause leaking, resulting in costly pump damage.

1.Remove the screws (15). Tip the pump housing (9) back, being careful not to damage the wires. Re- move the front cover (23).

2.Check the diaphragm guide (11) in the bottom of the pump housing (9) and replace it if is worn or dam- aged. Clean the pump housing thoroughly. Press the new guide, flat side first, into the housing, using only your fingers. Be sure it is installed evenly.

3.Screw the diaphragm (17) out of the connecting rod assembly (18).

4.Use a soft brass or nylon bristle brush to clean the top of the connecting rod and housing. Taking care not to damage the diaphragm grooves, gently clean the bottom of the pump housing (9).

5.Check the rod, motor bearing and eccentric. If there is any paint or damage, clean or replace the connect- ing rod assembly as explained on page 15.

6.Screw the new diaphragm (17) into the connecting rod just until it bottoms out. Then turn it 1/8 – 1/4 turn [about 4–6 in–lb (0.4–0.7 N.m)].

CAUTION

Never turn the diaphragm more than 1/4 turn when torquing it, as that will prevent the diaphragm from working properly.

7.Apply thread lubricant to the screws (15) and install them with the lockwashers (16) in the pump housing. Torque the screws a few inch–pounds (N.m) at a time, oppositely and evenly, to 85 in–lb (9.6 N.m).

8.Spin the motor shaft (D) to be sure it turns freely.

9.Reinstall the front cover (23).

Priming Valve & Tube (See Fig 15.)

NOTE: Each new priming valve kit includes a priming tube and fittings.

1.Unscrew the nut on the handle (E) of the priming valve (10a). Unscrew the stem of the handle.

2.Screw the priming valve (10a) out of the pump hous- ing (9).

3.Wrap the threads of the priming valve with PTFEr tape. Screw the valve snugly into the pump housing

(9). The valve handle should be parallel with the angled edge of the housing to avoid interference with the inlet or outlet valves.

4.Slide the nut (10d) and ferrule (10c) onto the tube (10e). Install the tube support (10b) in the end of the tube. Screw the nut onto the priming valve, which will seat the ferrule.

5.Screw the stem of the handle (E) onto the priming valve until it bottoms, and then back it out two turns. Hand tighten the nut onto the priming valve, and then

tighten the stem into the valve.

14307-730

44

47

11 45

17 46

18

15,16

LUBRICATE

THREADS;

TORQUE TO

85 in–lb (9.6 N.m)

9

D

23

24

Fig 14 0298

47
45	10e
46	10d
	10c	10
1	10b	48
	10a	49
		E
	WRAP WITH
	PTFE		TAPE
	9
Fig 15			0786
Suction Tube	(See Fig 15.)

1.Unscrew the nut (45) from the fluid inlet valve hous- ing (1). Remove the hose clamp (47). Slit the suction tube to free the nipple (46).

2.With the nipple (46) inserted through the nut (45), dampen the new hose (44) with warm water and press the hose over the nipple. Screw the nut onto the inlet valve housing (1). Press the hose further onto the nipple, leaving about a 1/8 in. (3 mm) gap between the nut and hose end.

3.Install the hose clamp (47) and tighten snugly.

4.Remove the filter housing (48) and filter (49) from the old suction hose. Install these parts on the new hose. Dampen the hose with warm water to ease the filter and filter housing onto the hose.