Macnaught DM100-02 Instruction Manual

Includes Models
DM100-01
DM100-02
DM100-03
DM100-04
DM100-05
DM100
POSITIVE DISPLACEMENT
FUEL METER
INSTRUCTION MANUAL
Introduction
Thank you for purchasing a Macnaught DM100
Positive Displacement Fuel Meter.
The Macnaught DM100 fuel meter has incorporated the
oval rotor principal into its design. This has proven to be a
highly reliable and highly accurate method of measuring
flow, providing exceptional repeatability and high accuracy.
The low pressure drop through the meter makes the meter
ideally suited for use in gravity applications or with the
Macnaught range of electric fuel pumps.
Macnaught manufacture a full range of pumps, meters and
accessories to suit most of your fluid transfer needs.
Pease consult your local Macnaught reseller for more
information.
CAUTION
With your appropriate care combined with the Macnaught
Guarantee of dependable after sales service, (provided by
our worldwide distribution network), you will be assured of
continuous safe, efficient and reliable product operation.
Observe precautions against fire or explosion when
dispensing flammable liquid. 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.
Please read and retain this instruction manual to
assist you in the operation and maintenance of this
quality product.
Ensure that you follow all the correct earthing and
grounding procedures before use.
General Information
This manual assists you in operating and maintaining your
new DM100 Fuel Meter. The information contained will
help you ensure many years of dependable performance
and trouble free operation.
Please take a few moments to read through this manual
before installing and operating your new fuel meter.
If you experience problems with the product, refer to the
Maintenance and Trouble Shooting sections of this
manual.
Inspect seals and connections for leaks weekly when
using flammable liquids.
Do not use Teflon tape on any connections when
using flammable liquid.
Installation
1) Ensure the meter is installed so the flow of the liquid is
in the direction of the arrows embossed on the meter body.
2) The meter can be installed in any orientation as long as
the meter shafts are in a horizontal plane. (see fig 2 for
correct installation). The register assembly may be rotated
to suit the individual installation.
If you require further assistance please contact your local
Macnaught Distributor, Authorised Macnaught Service
Centre or Macnaught P/L.
IMPORTANT
(fig 2)
Macnaught recommends, that as added protection to your
equipment you install a Macnaught fuel filter
assembly in line before the inlet of your DM Fuel Meter.
Contact your local Macnaught distributor for further details.
ME042 Issue 15 © 2014
Note: Incorrect installation can cause premature wear
of components.
3) Do not over tighten connections.
1
Register rotation
1) Unscrew the 4 screws holding the register assembly
2) Carefully lift off the complete register assembly from the
register base
3) Rotate the register assembly to the desired position.
4) Carefully re-fit the register assembly to the meter body.
CAUTION
D/GEAR
(fig 3)
5) Replace the 4 hex screws and nuts and tighten firmly.
6) Insert gear marked L1(Litre) or Q1 (Quart) onto the
shaft located in the gear box.
Do not force the register assembly when re-fitting to
the register base. Ensure that both the register drive
gear and meter drive gear are properly engaged before
replacing the register screws, or damage may occur.
7) Place the gear marked L2 (Litre) or Q2 (Quart) on top
of gear 1. The hole in gear 2 should be positioned to align
with the output shaft hole in the gear box.
5) Replace the 4 register screws.
8) Place the gear marked L3 (Litre) or Q3 (Quart) onto the
same shaft as gear 1.
Meter disassembly
1) Ensure that the fluid supply to the meter is
disconnected, and the line pressure is released
before disassembly.
2) Unscrew the 4 screws holding the register
assembly.
3) Carefully lift off the complete register assembly from the
register base
9) Insert the gearbox cover o’ring into the o’ring
groove on the gear box cover
10) Fit the gear box cover assembly by carefully inserting
the output shaft through gear 2 and into the output shaft
hole in the gear box.
11) Fit the 4 gear box cover screws and tighten securely.
12) Rotate the register assembly to the desired position.
4) Remove the 4 gear box cover screws and carefully
remove the gear box cover assembly, o’ring and gears
from the gear box.
NOTE: The gear on the gear box cover
assembly should not be removed. If there is any wear or
damage the complete gear box cover assembly should be
replaced.
5) Remove the 4 hex bolts holding the register base to the
meter body remove the meter body o’ring and both rotors
Check all components for wear or damage and replace as
required.
Meter reassembly
13) Carefully re-fit the register assembly
body. Fit 4 screws and tighten firmly.
to the meter
14) Press the reset button to reset the batch total to zero.
15) Test the meter by turning the rotors with a finger or by
applying low air pressure. (No more than a good breath)
to the inlet port of the meter. This will confirm the meter is
operating correctly and that the number wheels are
ascending.
DM150 Meter and Filter assembly
Note:
Order HA1s for filter assembly only
1) Clean all components before reassembly.
NOTE:
The rotor with the drive pinion must be fitted to the side of
the meter body, which has D/Gear marked on the meter
body, (see fig 3).
FLOW
2) Replace the rotors so as they are at 90O to each other,
(see fig 3). Check the rotor rotation by turning either of the
rotors. If the rotors are not in mesh correctly or do not
move freely remove one of the rotors and replace it
correctly at 900 to the other rotor. Recheck the operation of
the rotors.
3) Insert o’ring into the o’ring groove on the register base
(fig 4)
4) Carefully align the spring pins on the meter body to the
spring pin holes on the register base
ME042 Issue 15 © 2014
Note:
Order DM150-01 for Meter and Filter assembly complete
2
Spare Part Diagram
Spare Part Listing
Item No. off
order for replacement
Part or set
Kit ref
DM100-1K (A)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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2
2
1
1
1
1
1
1
1
4
4
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
6
Seal kit
n/a - new meter required
A
A
ME023s
A
n/a - new meter required
ME035s (Litre)
ME035US (US Gal)
A
A
A
ME025s ME041s (Litre)
ME041US (US Gal)
Description
Meter body
Dow el pins
Spring pins
Strainer
O'RING (Viton) BS121V
Rotor w ith drive pinion
Rotor
O'ring (Viton) BS150V
Register base
Dow el pins
Hex screw (M6 X 20)
Nut (M6)
1st Gear
2nd Gear
3rd Gear
4th Gear
Output shaft
Circlip
Washer
O'ring (Viton) BS007V
Gear box cover
Bush
Gear
O'ring (Viton) BS032V
Screw (M4 X 16)
Register assembly
Facia plate
Weather seal
Knob
Washer
Screw
Screw (M4 X 12)
3
Troubleshooting Guide
TROUBLE
Fluid w ill not flow through the meter
Reduced flow through the meter
Meter reading inaccutate
Fluid flow s but no reading on the meter
Fluid leaks into the register assembly
CAUSE
a) Foreign matter blocking the rotors (6,7)
b) Strainer (4) is blocked
c) Damaged rotors (6,7)
e) Connections over tightened
Strainer partially blocked (4)
a) Flow rate is either too high or too low
b) Excess w ear caused by incorrect
installation
a) Drive gear loose (23)
b) Rotor (6) drive gear damaged
c) Gearbox gears (13-16) damaged
d) Register gears damaged
Damaged o'ring (20) or o'ring (24)
REMEDY
a) Dismantle the meter and clean the rotors (6,7)
(Fit an in line strainer)
b) Clean strainer (4)
c) Replace rotors (6,7)
e) Re-adjust connections
Clean strainer (4)
a) Adjust flow rate (refer to specifications)
b) Check meter body (1) register base (9) and rotors (6,7) for
w ear or damage.(Replace as required)
a) Replace gear box cover assembly (16-23)
b) Replace rotor (6)
c) Replace damaged gears
d) Replace register assembly
Replace gear box cover assembly (13-23)
or o'ring (24)
Product Specifications
Accuracy
+/- 1” of Reading
Type
Oval Gear
Flowrate
3 - 80 Litre/min (0.8-21 US Gal/min)
Maximum Pressure
345kPa / 50psi / 3.45 Bar
Suitable for use with
Diesel, Kerosene, Petrol and Oils up to 1000cps.
Reset-able Totalizer
999.9 Lt or Gal
Non-Reset-able Total
999999 Lt or Gal
Wetted Components
Aluminium, Mild Steel, Brass
Acetal, Viton, Polyetherimide Resin
Port Threads
1” Rp
1” NPT
1” BSP.F (G)
Minimum Gravity Head
550mm
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