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309377
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.
