Macnaught HG 55 Series, HG55-01, HG55-02 Instruction Manual
Include s models
HG55-01
HG55-02
HG 55 OIL CONTROL GUN
WITH ELECTRONIC METER
INSTRUCTION MANUAL
INTRODUCTION
Thank you for purchasing a HG55 Electronic oil
control gun. Macnaught oil control guns have been
designed to accurately dispense, measure and control
oil flow. The control guns are suitable with engine oil,
gear oil, automatic transmission fluid, anti-freeze/antiboil and compatible fluids.
Please read and retain this instruction manual to
assist you in the operation and maintenance of this
quality product.
Note: Batteries are not pre-fitted and are included
separately inside the box. Please refer to “Battery
Replacement” on page 3 for correct procedure.
GENERAL INFORMATION
This manual assists you in operating and maintaining your
new oil control gun. 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 oil control gun. If
you experience problems with this product, refer to the
trouble shooting sections of this manual. If you require
further assistance please contact your local Macnaught
distributor or authorised Macnaught service centre.
IMPORTANT INFORMATION
READ THIS INFORMATION
CAREFULLY BEFORE USE.
Your safety is important to us. Please read and follow
all safety instructions listed inside.
Some of these instructions alert you to the potential
for personal injury. “Cautions” listed throughout this
manual advise of potential practices or procedures
which may cause damage to your equipment.
Ensure all operators have access to adequate
instructions about safe operating and maintenance
procedures.
WARNING
This oil control gun should not be used for in-line
installations or used with a manual a shut off nozzle.
The Safe operating pressure of this nozzle is 500 PSI
The line pressure between the pump and the
dispensing handle trigger valve must not exceed 1500
PSI (103 BAR). Please ensure an adequate pressure
relief valve is installed for operator safety.
The auto non drip nozzle MUST not be modified
CAUTION
Never point the nozzle at yourself or anyone else.
Never exceed the pressure rating of any component
installed in the System.
Before each use check all hoses for signs of wear,
leaks or loose fittings. Tighten all fluid connections
regularly and replace weak or damaged hoses.
Before attempting any repairs or maintenance of this
product firstly disconnect the air supply from the oil
pump, then release the oil line pressure by pressing
the lever on your oil control gun.
ASSEMBLY
Use Teflon tape (or suitable thread sealant ) when
connecting the oil control gun to an oil hose.
Outlet Nozzle.
The outlet nozzle can be fitted either “inline” (forward) or
on the outlet port “pistol style” located under the gun.
The long outlet tube should be used for the “inline” option.
The short adaptor should be used (instead of the long
outlet tube) when using the “pistol style” option.
Note: Use the threaded Plug supplied to seal the outlet
port not in use.
HANDLE OPERATION
To latch the handle, press the lever, push the button and
then release lever.
METER INTRODUCTION
Operating mode description
Sleep Mode: To minimise battery consumption the meter
will revert to sleep mode if left idle for more than 2 minutes,
and will automatically “power up” if the RESET, button is
pressed or there is flow through the meter.
Do not hit the oil control gun if it fails to operate. Refer
to “trouble shooting guide” or return the unit to your
nearest authorised service centre.
The Reset button can be used in two ways:
Press – Press and release the button.
Double click – Press and release the button twice quickly.
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TOTALIZERS
There are three totalizers built in to your meter:
1) Reset-able batch total: Displays the current volume
dispensed. To reset batch total press the reset button.
2) Non reset-able accumulative total is located below
the batch total and displays the total volume the meter has
dispensed.
3) Reset-able accumulative total is hidden from view and
is used to track daily, weekly, or monthly usage.
Batch Total
Batch Total
Accumulative Total Units
TO VIEW OR RESET ACCUMULATIVE TOTAL:
1) Double click the Reset button (the display will enter the
reset-able total area.
2) To reset the reset-able total, press and release the
Reset button.
3) The display will return to manual mode after 5 seconds.
Batch Units
Low Battery
Warning
Error signal
If an error is detected, the following error code will appear
on the display.
Err1 – Sensor error
Err3 – Flowrate too high
Err4 – Calibration error
Err5 – Computer error
To reset the meter after an error signal press the Reset
button.
MAINTENANCE
CAUTION
Before carrying out any maintenance disconnect the
air supply to the pump and release the fluid pressure
in the system by pressing the lever on the control gun.
Inspect your oil control gun daily for any signs of damage.
Replace any damaged parts or components as required.
FIELD CALIBRATION
Field calibration will allow a +/- 5% adjustment to the
calibration.
1) In manual mode press the CAL button (located under
the calibration screw on the underside of the gun) for 5
seconds until Opt n 1 appears. (Refer item 16 page 4).
How to change the Units setting:
1) Press and hold down the Reset button for five seconds.
(The unit segment will appear)
2) Press the Reset button to cycle through the unit options.
3) Stop at the required setting.
Batch Total Accumulative Total
Litre Litre
Pint Gallon
Quart Gallon
Gallon Gallon
4) To store the selected units, press and hold down the
Reset button for five seconds until the batch and
accumulative totals appear. If the reset button is not held
down for 5 seconds, the original settings will be restored.
Low Battery
The battery segment will flash when the battery is low and
needs replacing.
Important: When the battery segment starts flashing
replace the battery as soon as possible, use only Alkaline
AA batteries.
Battery replacement
1) Remove the protective rubber boot.
2) Remove the battery cover screw located near the
Inline (forward) outlet port and remove the battery
cover.
3) Replace the two AA Alkaline batteries, note the battery
direction label inside the housing.
4) Inspect the battery cover seal for damage and replace if
necessary.
5) Replace battery cover and tighten screw.
2) Press the CAL button until F Cal appears.
3) Press the CAL button until F CAL starts flashing.
4) Using an accurate measuring container, fill the
container to the desired level. (e.g 5 litres)
5) Insert dispensed volume by:
a) Press reset button to change the numbers.
b) Press Cal button to move to the next number
c) Insert the correct dispensed value (e.g 5 litres)
d) Press Cal button for 5 seconds - F Cal will stop flashing.
6) To store press Reset for 5 seconds until 0.00 appears
CONTROL HANDLE DISASSEMBLY
Use a clean bench to carry out maintenance.
A) Remove the oil hose from the inlet swivel (26).
B) Unscrew and remove swivel (26) washer (24) and
o’ring (25) from the control gun inlet. Clean or replace the
strainer and o’ring.
Caution the swivel is under spring tension
C) Slide off the handle sleeve (23).
D) Remove valve spring (22), seal/valve body assembly
(20) and plunger (19).
Lever and Valve removal
A) Using a 2.5mm allen key, remove the 2 handle screws
(27).
B) Remove lever (29).
C) Remove the washer (18), “O”Ring (17), then push the
valve cam (14) from the gun body (13), and remove
“O”Ring (17).
HG614 Issue 15 © 2017 2
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