Servicing the Valve, Replacing the Automatic Nozzle

Service

Servicing the Valve

Valve Repair Kit 240453 is available and can be ordered separately. See the Parts List on page 18 and the Parts Drawing on page 19. The parts with asterisks next to their reference numbers are available in the Valve Repair Kit.

When you are repairing the valve with new parts from the Valve Repair Kit, use all of the new parts. To replace the parts, do the following:

1.Relieve the pressure.

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 5.

2.Remove the six screws (21) that hold the cover (1) together, and open the cover.

3.Remove the trigger (15) from the valve stem (16b*).

4.Unscrew the valve seat (16e*), remove the valve seat and valve stem assembly (16b*) from the meter housing, and pull the valve stem assembly out of the valve seat.

5.Discard the old valve stem assembly (16b*) and the spring (16a*).

6.Apply lubricant to all new parts. Place the new spring (16a*) in the new valve stem assembly (16b*), push the new valve stem assembly back into the valve seat (16e*), place the valve stem assembly, seat and spring into the meter housing, thread the valve seat into the meter housing, and torque to 140 to 150 in-lb (16 to 17 N.m).

NOTE: Take care that the spring (16a*) does not get pinched when you install the valve stem assembly (16) into the meter housing.

7.Place the trigger (15) on the valve stem assembly (16b*), put the cover (1) together, thread in the six screws that hold the cover together, and torque to 7 to 10 in-lb (0.8 to 1.1 N.m).

Replacing the Automatic Nozzle

The automatic nozzle (5b, 6b, or 7b) is not serviceable. If it leaks, replace it as follows:

1.Relieve the pressure.

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 5.

2.Remove the old nozzle from the extension with an open-end adjustable wrench on the flats of the nozzle bushing. See below.

nozzle bushing

TI0327

3.Thread the new nozzle (5b, 6b, or 7b) onto the extension, and tighten it firmly with an open-end adjustable wrench.

NOTE: Only tighten the nozzle with the wrench on the flats of the nozzle bushing. Do not disas- semble the bushing from the nozzle. Disassembly will affect the performance of the nozzle.

WARNING

Do not use the old Graco nozzle (Part No. 203655) or any other manual shut-off nozzle on the PM5 extension. You must use the new automatic nozzle that is provided with the PM5, or the meter could be damaged. Do not use any sealant material.

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