Flomec GPRO QM Series, Owner'S Manual

Page: 6 / 17

6
CALIBRATION
The meter is accurately calibrated at the
factory for use with diesel fuel � Due to
differences in viscosity and flow rates,
the meter may require recalibration
to measure other fuels or to adjust
for inaccuracies � A gear replacement
kit is available (PN 139500-15, see
Illustrated Parts List
section
)
to
convert the meter to unleaded fuels �
1 � To adjust the calibration of the me-
ter, gain access to the calibration
screw by performing the
following: ( see Figure
5a
)
2 � Remove the back plate and the
(4) screws retaining it � The O-ring
seal under the plate must not be
damaged �
3 � Using the 5 mm hex L-wrench
provided with the meter, adjust the
calibration screw as required �
4 � Note: The calibration screw set-
ting may have been adjusted at
the factory � The gasoline setting
is approximately fully closed (turn
clockwise) � Do not overtighten the
screw against the seat �
figure 5a
5 � Reinstall the plate, (4) screws
and the O-ring seal if removed �
Tighten (4) screws to 42-46 lb-in
[4 � 7-5 � 2 N
•
m] torque �
MAINTENANCE
The meter’s strainer should be cleaned
at regular intervals, especially if reduced
flow is encounter ed �
Clean or Replace Strainer
1 � Remove the socket screws at the
inlet fitting� Remove the fitting, O-
ring and strainer � ( see Figure 5
b
)
figure 5 b
2. The strainer rim is pressed into the
housing inlet but can be removed
by carefully grasping the end with
pliers and pulling with a wiggling
motion until free �
3. Using a fine b r ush, clean the strainer �
Replace the strainer as necessary �
4 � Wipe the housing inlet and re-
install the strainer by press ing it
in to place with the end of a 1”
pipe nipple ( or 1" electrical conduit
for QM40) or similar tube tool using
light hammer taps �
CAUTION
The mesh strainer must always be
installed when operating the meter;
otherwise, particles may enter the
meter chamber and disrupt the
operation of the oval gears �
5 � Wipe the fitting and O-ring groove
clean � Coat the O-ring with oil or
light grease and seat into the
fitting groove �
6 � Reinstall the inlet fitting and screws �
Tighten screws to 42-46 lb-in
[4 � 7-5 � 2 N
•
m] torque �