PEI GPRO QM40 User manual

921528-01 Rev. G
03/2022
General Information�������������������������������������� 2
Installation �������������������������������������������������������� 3
Operation ���������������������������������������������������������� 5
Calibration��������������������������������������������������������� 6
Maintenance ���������������������������������������������������� 6
Troubleshooting ��������������������������������������������� 7
Specications��������������������������������������������������� 8
Informative Table - Diesel����������������������������9
Informative Table - Unleaded������������������ 10
Illustrated Parts List �������������������������������������12
Parts and Service ������������������������������������������17
TABLE OF CONTENTS
SAVE THESE INSTRUCTIONS
QM40 Positive Displacement Fuel Meter
Owner’s Manual
To the owner…
Congratulations on receiving your
GPRO® QM40 Meter� We are pleased to
provide you with a meter designed to give
you maximum reliability and eciency�
Our business is the design, manufacture
and marketing of liquid handling,
agricultural and recreational products� We
succeed because we provide customers
with innovative, reliable, safe, timely and
competitively-priced products� We pride
ourselves in conducting our business with
integrity and professionalism�
We are proud to provide you with a quality
product and the support you need to
obtain years of safe, dependable service�
Great Plains Industries, Inc� is a member
of the Petroleum Equipment Institute.
Victor Lukic, President
Great Plains Industries, Inc�

2
GENERAL INFORMATION
The purpose of this manual is to
assist you in installing, operating and
maintaining your mechanical fuel meter�
Please take a few moments to read
these instructions before installing and
operating your fuel meter�
SAFETY INSTRUCTIONS
The following safety alert symbols are
used in this manual�
DANGER
DANGER indicates a hazardous
situation which, if not avoided, will
result in death or serious injury.
WARNING
WARNING indicates a hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION
CAUTION indicates a hazardous
situation which, if not avoided, may
result in minor or moderate injury.
It is your responsibility to:
• Know and follow applicable na-
tional, state and local safety codes
pertaining to installing and operat-
ing equipment for use with flam-
mable liquids�
• Know and follow all safety precau-
tions when handling petroleum
fuels
• Ensure that all equipment op-
erators have access to ade-
quate instructions concerning
safe operation and maintenance�
Appropriate Use of QM40 Meter:
1�
WARNING
This meter is for use
only with thin viscosity petroleum
fuels such as gasoline, gasoline-eth-
anol blends (up to E15), diesel, diesel
blends (up to B20), kerosene, aviation
gasoline AVGAS 100LL, and Jet A�
2�
DANGER
Observe precau-
tions against re or explosion when
dispensing fuel� Do not operate the
meter in the presence of any source
of ignition including running or hot
engines, lighted cigarettes, or gas
or electric heaters�
3�
WARNING
Any components
such as hose, nozzle, or pump
added to your meter must be stati-
cally grounded and approved for
use with petroleum fuels�
4�
WARNING
Avoid prolonged
skin contact with petroleum fuels�
Use protective goggles, gloves,
and aprons in case of accidental
splashing or spillage� Change
saturated clothing and wash skin
contact areas promptly with soap
and water�
This meter is designed for the eld
measurement of thin viscosity petro-
leum fuels only and intended for use
with pump systems up to 40 GPM
(150 LPM) ow range (not intended
for gravity ow systems)� Using me-
chanical gears, these meters translate
ow data from positive displacement
oval gears into calibrated units which
are indicated on the face of the meter�
This meter is factory calibrated for
diesel fuel� Field calibration feature is
available for other uids, see Calibra-
tion section�
AVIATION NOTE:
QM40 is approved for ground-based re-
fueling only� Do not use in or on aircraft�
Please consult NFPA 407 for recom-
mended safety requirements during
ground fuel servicing of aircraft using
petroleum fuels�

3
INSTALLATION
Before installing your meter, review
the safety instructions given above�
Examine your meter to make sure
there are no visible signs of shipment
damage� Plan your meter installation
by reviewing the following procedures�
Your system must be mounted on a
vented tank� If the tank is unvented,
your local dealer or distributor can
supply a pressure cap�
If the meter is located in a rigid piping
system where the fluid is trapped
(for example, by gravity, valves or
nozzles) thermal expansion of the uid
can create pressure spikes that can
damage a meter� Install a thermal relief
valve or otherwise allow for thermal
expansion of the uid�
The flowmeter MUST be mounted so
that the rotor shafts are in a horizontal
plane� Mounting the meter with the
mechanical display facing horizontally
will orient the rotor shafts correctly�
The mechanical display should never
face upwards or toward the ground�
The weight of the rotors must be
supported by the horizontal rotor shafts�
If installed incorrectly, performance,
life or accuracy could be affected�
(see Figure 1)
Liquid can ow in a horizontal direction,
or a vertical direction, but in each case
the rotor shafts must be in a horizontal
plane�
It is preferred to install the flow-meter
upstream of a flow control or shut-off
valve, as the back pressure provided
by the valve will be benecial to system
accuracy� The flow meter should
remain full of liquid at all times when
connected�
Do not operate the ow-meter directly
discharging to the atmosphere�
Prior to installation, determine whether
horizontal or vertical ow is required�
For vertical ow installations the liquid
should travel from bottom to top, i�e�
it should rise vertically through the
flow-meter� This will ensure that the
flow-meter remains full of liquid, and
will prevent air entrapment in the meter�
The back of the meter housing is
embossed with “INLET” and “OUTLET”
adjacent to its respective port to assist
in correct piping connections�
gure 1
Correct
Horizontal Flow
Vertical Flow
InCorrect
Correct

4
QM40 Modular Congurations
outlet adapter/o-ring/bolts
inlet adapter/o-ring/bolts
The QM40 includes adapter plates, o-rings, and
bolts for use with threaded pipe.
90° outlet adapter/o-ring/bolts
Without the inlet adapter plate, the QM40 can be bolted
directly to the outlet of a GPI or GPRO pump featuring
a modular outlet. Bolt modular accessories to the
outlet of the QM40 or use the outlet adapter plate for
threaded pipe.
pump with modular outlet
90° outlet adapter/o-ring/bolts
modular lter adapter/o-rings/bolts
pump with modular outlet
Use a GPI modular lter adapter to include a lter
into your system
gure 4a
gure 4b
gure 4c

5
Changing Display Orientation
The mechanical display case can be
removed, rotated and reinstalled for easy
reading with either horizontal or vertical
ow (see Figure 2)
1� Using a 5mm hex wrench, remove
the (4) M6 socket screws from back
of housing�
2� Without separating the housing from
the mechanical display, sit the meter
face up
3� Lift the mechanical display from the
housing, rotate to desired orienta-
tion and place back on to housing
Note: Ensure bevel gear is still present
on center drive shaft as bevel gear is
not retained, see Figure 2 for bevel
gear location
4� Reinstall the (4) M6 socket
screws and tighten to 42-46 lb-in
[4�7-5�2 N•m] torque�
DETAIL A
SCALE 2 : 1
A
M6 SOCKET SCREWS
4 EA.
M4 SOCKET SCREWS
4 EA.
gure 2
Meter Installation
1� Remove the protective plugs from
the meter inlet and outlet ports� The
inlet port has a 100 mesh stainless
steel conical strainer installed�
CAUTION
The mesh strainer must always be
installed when operating the meter;
otherwise, particles may enter the
meter chamber and disrupt the
smooth operation of the oval gears�
2� Wrap threaded male connections
with thread tape or use a pipe
sealant compound compatible with
petroleum fuels�
3� Install the meter on the pump us-
ing an appropriately sized nipple�
The bottom of the meter housing
is embossed with “INLET” and
“OUTLET” adjacent to its respec-
tive port to assist in correct piping
connections�
4� Install other system components
onto the meter and tighten�
OPERATION
ALWAYS FOLLOW SAFETY PRECAUTIONS
WHEN OPERATING THIS EQUIPMENT�
REVIEW THE SAFETY INSTRUCTIONS�
Before each use, visually check the meter
to ensure it is securely connected to
other system components and there is no
leakage� Promptly wipe spilled fuel from
the meter’s exterior and other system
components�
The large meter display represents
the Batch Total for each fuel delivery�
Before dispensing, reset the Batch
Total to zero by turning the knob� (see
Figure 3)
KNOB
BATCH TOTAL
CUMULATIVE TOTAL
gure 3
The small display represents the
Cumulative Total of all fuel deliveries
and cannot be reset�

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 to convert the meter to unleaded
fuels� (PN 139500-15, see Illustrated Parts
List section)
1� To adjust the calibration of the me-
ter, gain access to the calibration
screw by performing the following:
(see Figure 4)
2� Remove the back plate and the
(4) screws retaining it� The O-ring
seal under the plate must not be
damaged�
3� Using a 5MM hex L-wrench, 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�
CALIBRATION SCREW
gure 4
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
ow is encountered�
Clean or Replace Strainer
1� Remove the socket screws at the
inlet fitting� Remove the fitting, O-
ring and strainer� (see Figure 5)
STRAINER SKELETON
STRAINER
gure 5
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 ne brush, clean the strainer�
Replace the strainer as necessary�
4� Wipe the housing inlet clean and
reinstall strainer, pressing it into
the strainer bore� It is designed to
be field pressed back into place
using the end of a clean 1” pipe
nipple 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
smooth operation of the oval gears�
5� Wipe clean the fitting and O-ring
groove� Coat the O-ring with oil or
light grease and seat into the tting
groove�
6� Reinstall the inlet tting and screws�
Tighten screws to 42-46 lb-in
[4�7-5�2 N•m] torque�

7
TROUBLESHOOTING
Symptom Probable Cause Corrective Action
A� Meter counter does
not operate� (Normal
fuel ow)
Broken counter
assembly�
Replace counter�
Counter alignment Look for loose or
missing fasteners, bent
or misaligned parts�
Foreign material in
counter assembly�
Remove and clean
counter assembly�
Missing or worn bevel
gear�
Replace bevel gear�
B� Meter counter does
not operate�
(Little or no fuel ow)
Clogged strainer in
meter inlet�
Clean or replace
strainer
Jammed rotors from
foreign material in rotor
assembly�
Remove and clean rotor
assembly�
Other system
components
malfunctioning�
Check all system
components tank to
nozzle for clogs and/or
malfunctions� Repair as
necessary�
C� Fuel leakage� Leakage between
coverplate and housing�
Remove coverplate and
inspect for damaged,
missing or incorrectly
seated seal� Replace
as required�
Leakage at ttings Remove ttings and
inspect for damaged,
missing or incorrectly
seated seals� Replace
as required�
Leakage at threads� Remove meter and
reseal all threaded
connections with thread
tape or pipe thread
sealing compound
approved for use with
ammable liquids�

8
SPECIFICATIONS
Gallon Models Litre Models
Model
Designation QM40-G8N QM40-L8N
Unit of Measure U�S� Gallon Litre
Flow Range 2 to 40 GPM 8 to 150 LPM
Typical Accuracy
(Factory Set)1
Diesel: ±0�5% (15-30 GPM/57-113 LPM)
±1�0% all other flowrates
Unleaded: +0�5% to -1�5% (15-30 GPM/57-113 LPM)
±2�0% all other flowrates
Typical Accuracy
(Field/Customer
Set)1
Diesel: ±0�25% at a given flow (15-30 GPM/57-113 LPM)
±0�5% all other given flows
Unleaded: ±0�5% at a given flow (2-23 GPM/8-87 LPM)
±0�5% at a given flow (23-40 GPM/87-150 LPM)2
Resolutional
Error (Display)
(0�01/Dispensed
Amount)*100
(0�1/Dispensed
Amount)*100
Operating
Temperature -20°F to 125°F -29°C to 52°C
Maximum Work-
ing Pressure 50 PSIG / 3�4 Bar
Wetted Materials:
Housing / Cover
/ Fittings Aluminum
Rotors PPS (Polyphenylene Sulde)
Shafts / Strainer Stainless Steel
Seals NBR (Nitrile Butadiene Rubber)
Mag-Drive Acetal, Stainless Steel and Neodymium (Nickel Plated)
Inlet/Outlet Ports 1" NPT (female) 1" NPT (female)
Pressure Drop
(at Max� Flow)
Diesel: 7�0 PSI / 0�5 Bar
Unleaded: 4�5 PSI / 0�3 Bar
Maximum
Batch Total 999�9 9999
Maximum
Cumulative Total 9,999,999�9 99,999,999
Technology Positive Displacement
1
Results may vary due to application variations�
2
Unleaded Fuel Kit required (Part No� 139500-15)
Note: Field Calibration is available on all models.

9
0 1 2 3 4 5 6 7 8
-1.5 -1.0 -0.5
0.0 0.5 1.0 1.5
0 5 10 15 20 25 30 35 40
PRESSURE DROP PSI
ERROR %
FLOWRATE GPM
QM40 ACCURACY & PRESSURE DROP vs FLOWRATE - DIESEL
FACTORY SETTING NOMINAL UPPER RANGE FACTORY SETTING NOMINAL LOWER RANGE
CALIBRATION SCREW IN CALIBRATION SCREW OUT 2 TURNS PRESSURE DROP

10
*A gear replacement kit is available (P/N 139500-15) to convert the meter to unleaded fuels� Replacement gear kit will adjust entire ow curve up 1�5%�
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
-1.5 -1.0 -0.5
0.0 0.5 1.0 1.5 2.0
0 5 10 15 20 25 30 35 40
PRESSURE DROP PSI
ERROR %
FLOWRATE GPM
QM40 ACCURACY & PRESSURE DROP vs FLOWRATE - UNLEADED
SCREW IN ORIGINAL EQUIPMENT SCREW IN WITH GEAR KIT SCREW OUT 2 TURNS WITH GEAR KIT PRESSURE DROP

921528-01 Rev. G
03/2022
*A gear replacement kit is available (P/N 139500-15) to convert the meter to unleaded fuels� Replacement gear kit will adjust entire ow curve up 1�5%�
NOTES:

12
ILLUSTRATED PARTS LIST
IA
B C
F
H
G
N
B
C
J

13
Kits and Accessories
ITEM PART NO� DESCRIPTION
A 139500-01 KIT, SEAL:
Includes (1) housing O-ring, (2) tting O-rings, (1) back plate O-ring
B 165700-02 KIT, FITTING, 1”NPT:
Includes (2) ttings, (2) tting O-rings, (1) strainer, attaching hardware
C 165700-09 KIT, FITTING, 1” BSPP:
Includes (2) ttings, (2) tting O-rings, (1) strainer, attaching hardware
F 139500-06 KIT, ROTOR:
Includes (1) rotor set
G 139500-07 KIT, COVERPLATE ASSEMBLY, GAL:
Includes (1) assembled coverplate (gears, mag drives), housing seal, at- taching hardware
H 139500-08 KIT, COVERPLATE ASSEMBLY, LITRE:
Includes (1) assembled coverplate (gears, mag drives), housing seal, at- taching hardware
ITEM PART NO� DESCRIPTION
I 139500-09 KIT, CALIBRATION SCREW:
Includes (1) calibration screw, (1) O- ring
J 139500-10 KIT, BACK PLATE:
Includes (1) back plate, (1) O-ring, at- taching hardware
N 139500-14 KIT, STRAINER:
Includes (1) strainer
- 139500-15 KIT, UNLEADED FUEL, QM40:
Not shown

14
ILLUSTRATED PARTS LIST
D
KL
E
M

15
Kits and Accessories
ITEM PART NO� DESCRIPTION
D 139500-04 KIT, KNOB ASSEMBLY:
Includes (1) knob assembly
E 139500-05 KIT, COUNTER ASSEMBLY:
Includes (1) counter assembly, attach- ing hardware
K 139500-22 KIT, TOP COVER, GALLON:
Includes (1) top cover w/gallon decal, attaching hardware
L 139500-23 KIT, TOP COVER, LITRE:
Includes (1) top cover w/litre decal, attaching hardware
M 139500-13 KIT, MIDDLE COVER:
Includes (1) middle cover, attaching hardware
- 139500-15 KIT, UNLEADED FUEL, QM240:
Not shown

16
NOTES:

17
PARTS AND SERVICE
For warranty consideration, parts,
or other service information, contact
your local distributor� If you need
further assistance, please contact
GPI Customer Service Department
in Wichita, Kansas during normal
business hours at:
1-800-835-0113�
To obtain prompt, efficient service,
always be prepared with 1�) the model
number of your meter, 2�) the manufac-
turing date located on the back of the
meter, and 3�) specific information, as
necessary, obtained from the Illustrated
Parts List� For warranty work always be
prepared with proof of purchase date�
Please contact GPI before returning any
parts� It may be possible to diagnose
the trouble and identify needed parts
without returning parts� GPI can also
inform you of any special handling
requirements you will need to follow
covering the transportation and han-
dling of fuel transfer equipment� Before
packing for shipment, make sure the
meter is thoroughly drained and free
of fuel and vapors�
CAUTION
Do not return meters or parts
without specic authority from the
GPI Customer Service Department�
Due to strict regulations governing
shipment of ammable liquids,
meters may be refused and
returned to the sender if sent
without authorization�

03/2022 921528-01 Rev. G
Limited Warranty Policy
Great Plains Industries, Inc. 5252 E. 36th Street North, Wichita, KS USA 67220-3205, hereby provides a limited
warranty against defects in material and workmanship on all products manufactured by Great Plains Industries,
Inc. This product includes a 4 year warranty from date of purchase as evidenced by the original sales receipt.
A 54 month warranty from product date of manufacture will apply in cases where the original sales receipt is
not available. Reference product labeling for the warranty expiration date based on 54 months from date of
manufacture. Manufacturer’s sole obligation under the foregoing warranties will be limited to either, at Manufac-
turer’s option, replacing or repairing defective Goods (subject to limitations hereinafter provided) or refunding
the purchase price for such Goods theretofore paid by the Buyer, and Buyer’s exclusive remedy for breach of
any such warranties will be enforcement of such obligations of Manufacturer. The warranty shall extend to the
purchaser of this product and to any person to whom such product is transferred during the warranty period.
This warranty shall not apply if:
A. theproducthasbeenalteredormodiedoutsidethewarrantor’sdulyappointedrepresentative;
B. the product has been subjected to neglect, misuse, abuse or damage or has been installed or
operated other than in accordance with the manufacturer’s operating instructions.
To make a claim against this warranty, contact the GPI Customer Service Department at 316-686-7361 or
800-835-0113. Or by mail at:
Great Plains Industries, Inc.
5252 E. 36th St. North
Wichita, KS, USA 67220-3205
GPI will step you through a product troubleshooting process to determine appropriate corrective actions.
GREAT PLAINS INDUSTRIES, INC., EXCLUDES LIABILITY UNDER THIS WARRANTY FOR DIRECT, IN-
DIRECT, INCIDENTAL AND CONSEQUENTIAL DAMAGES INCURRED IN THE USE OR LOSS OF USE OF
THE PRODUCT WARRANTED HEREUNDER.
Thecompanyherewithexpresslydisclaimsanywarrantyofmerchantabilityortnessforanyparticularpurpose
other than for which it was designed.
ThiswarrantygivesyouspecicrightsandyoumayalsohaveotherrightswhichvaryfromU.S.statetoU.S.state.
Note: In compliance with MAGNUSON MOSS CONSUMER WARRANTY ACT – Part 702 (governs the resale
availability of the warranty terms).
Some models are not UL Listed.
Check your model for UL label if in doubt.
© 2019 GREAT PLAINS INDUSTRIES, INC. All Rights Reserved.
FLOMEC and GPRO are registered trademarks of Great Plains Industries, Inc.