308847 3
Service
To clean meter fluid piston, proceed as follows (see
Fig. 2):
Fig. 2
TI1932A
Piston
Chamber Bottom
Chamber Screen
O-ring
Housing Cap
Pawl Pinion
Divider Plate
1.
Stop pump, dispense fluid at a station supplied by
this pump to relieve line pressure, close gate valve
downstream of meter and disconnect electric
power from Power Supply Module.
2.
Disconnect fluid hose from gate valve and meter,
and meter from pump.
3.
Secure meter in a vise and screw cap out of meter
housing. Carefully remove o-ring packing, using a
small straight-blade screwdriver. Then remove
piston and chamber assembly.
4.
Insert screwdriver into notch of chamber, pry off
top, and remove inner parts.
5.
Clean all parts, including meter housing, in solvent,
and blow dry. Inspect all parts for damage or wear.
Especially check outer surfaces of piston and inner
surfaces of chamber bottom for pitting or scoring,
and replace these parts, if necessary, with a com-
plete meter assembly.
NOTE:
Be careful not to damage cam wheel or micro-
switch, or get solvent in switch when servicing fluid
piston.
6.
To assemble, insert piston into chamber bottom so
the divider plate is centered in slot of piston. Turn
the pawl pinion on gear box so the notch in small
disk on opposite side of gear box is centered on
the groove in the larger disk. Align the divider plate
in chamber bottom with groove in bottom of gear
box and snap together.
7.
Place chamber, gears first, and piston assembly in
meter housing and turn it to be sure gears mesh.
When properly engaged, meter cam wheel will turn
as chamber and piston assembly turns.
8.
With chamber screen and o-ring in place, screw
cap tightly into meter housing, install cover, and
reinstall meter.
9.
Start pump and dispense fluid to test meter and
system operation, and to purge all air from system.
