Macnaught HG20F-01 User manual

HG616 Issue 10 © 2017 1
HG 20R(Rigid) & HG20F (Flexible)
OIL CONTROL GUNS
INSTRUCTION MANUAL
INTRODUCTION
Thank ou for purchasing a Macnaught oil dispensing
gun complete with either a flexible or rigid extension.
The Macnaught oil dispensing guns have been
designed for use with engine oil, gear oil, automatic
transmission fluid, anti-freeze/anti-boil and compatible
fluids.
Macnaught also manufacture a complete range of ratio
oil pumps and retractable oil hose reels, greasing
equipment and accessories to fulfil all our fluid
handling and greasing needs requirements.
Please read and retain this instruction manual to
assist ou in the operation and maintenance of this
qualit product.
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 dependa le performance and
trou le free operation.
Please take a few moments to read through this manual
efore installing and operating your new oil control gun. If
you experience pro lems with this product, refer to the
trou le shooting sections of this manual. If you require
further assistance please contact your local Macnaught
distri utor or authorised Macnaught service centre.
IMPORTANT INFORMATION
Your safet is important to us. Please read and follow
all safet instructions listed inside.
Some of these instructions alert ou to the potential
for personal injur . “Cautions” listed throughout this
manual advise of potential practices or procedures
which ma cause damage to our equipment.
Ensure all operators have access to adequate
instructions about safe operating and maintenance
procedures.
Do not exceed the maximum working pressure of 6900
kPa / 1000 psi / 69 bar.
Do not hit the oil control gun if it fails to operate. Refer
to “trouble shooting guide” or return the unit to our
nearest authorised service centre.
Never point the nozzle at ourself or an one else.
Never exceed the pressure rating of an component
installed in the S stem.
Before ever use check all hoses for signs of wear,
leaks or loose fittings. Tighten all fluid connections
regularl and replace weak or damaged hoses.
Before attempting an repairs or maintenance of this
product firstl disconnect the air suppl from the oil
pump, then release the oil line pressure b squeezing
the lever on our oil control gun.
ASSEMBLY
Use Teflon tape (or suita le thread sealant ) when
connecting the oil control gun to an oil hose.
OUTLET NOZZLE OPERATION
When fluid flows through the gun the outlet nozzle will
automatically open. When the fluid flow stops the outlet
nozzle will automatically shut.
HANDLE OPERATION
To latch the handle, squeeze the lever, push the utton
and then release lever.
To release the latch in manual mode simply squeeze and
release lever.
READ THIS INFORMATION
CAREFULLY BEFORE USE.
CAUTION
Before carr ing out an maintenance disconnect the
air suppl to the pump and release the fluid pressure
in the s stem b 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.
CAUTION
Includes models
HG20F-01
HG20R-01
HG20R-02

HG616 Issue 10 © 2017 2
CONTROL HANDLE DISASSEMBLY
Use a clean ench to carry out maintenance.
A) Remove the oil hose from the control gun inlet swivel
(10).
B) Unscrew and remove swivel (10) washer and o’ring
from the control gun inlet. (Clean or replace the swivel
strainer and o’ring if required).
The swivel is under spring tension
C) Remove valve spring (9), seal/valve ody assem ly (8).
and plunger (7).
D) Remove the screw (15), then unclip and remove the
trigger guard (16).
LEVER and VALVE REMOVAL
A) Using a 2.5mm allen key, remove the 2 handle screw
(2).
B) Remove lever (11), ease downwards.
C) Remove the washer (5), “O”Ring (3), then push the
valve cam (4) from the gun ody (6), and remove “O”Ring
(3).
Note: If the plunger has not een removed the cam will not
release from the ody.
PARTS DIAGRAM
CONTROL HANDLE REASSEMBLY
A) Clean and inspect all parts. Replace any suspect,
worn or damaged components.
Note: Lightly lu ricate the valve cam efore assem ly.
B) Place “O”Ring (3) onto valve cam (4).
Note: The cut out section in the middle of the valve cam
(4) must face the inlet swivel (10).
C) Replace the valve cam (4) into the ody (6). Note the
orientation shown on the assem ly drawing. Fit the
second “O”Ring (3) and washer (5).
D) Slide lever assem ly (11) into position and replace the
two Allen screws (2). (Use Loctite or similar sealant).
E) Replace plunger (7).
Note: The end hole in the plunger must face the gun
outlet.
F) Replace the seal/valve ody assem ly (8), and
spring (9) and replace into the gun ody (6).
Note: Install the spring, small end first.
G) Re-fit the trigger guard (16) and replace screw (15)
H) Replace washer, o’ring on to the swivel assem ly (10),
and screw firmly into place (Use Loctite or similar
sealant).
Note: After assem ly ensure the handle latch is operating
correctly.
CAUTION
2
6
10
5
3
1
14
9
12 15
11
8
7
4
13
16
3
15

HG616 Issue 10 © 2017 3
SPARE PARTS LIST
TROUBLE SHOOTING GUIDE
TROUBLE CAUSE REMEDY
No fluid passing through the gun Blocked strainer Clean or replace strainer
Constant oil leak from the nozzle Damaged plunger seal Replace plunger seal ( check for damage )
Intermittent drip from the nozzle Dirt in the nozzle Remove the nozzle and low out any dirt particles,
replace if necessary.
Oil leak from camshaft area Damaged o’rings Replace damaged o’rings
Low flow rate Blocked strainer Replace strainer
Oil leaking from the swivel inlet Damaged o’ring or swivel Replace damaged o’ring or swivel
Order for replacement
Item No off Part or Set Kit Ref Description
HG20-1K (Kit A) Seal Kit
1 1 IM078As Flexi le Extension with Auto Nozzle
1 1 HG510As Rigid Extension with Auto Nozzle
2 2 A Screw (M4 x 8 CSK)
3 2 A O-ring BS111
4 1 A Camshaft
5 1 A Washer
6 1 n/a - new gun reqired Body Casting
7 1 A Plunger Cage
8 1 A Valve Seal
9 1 A Spring
10 1 HG040As Swivel Assem ly (BSP)
10 1 HG043As Swivel Assem ly (NPT)
11 1 Handle (Latching)
12 1 HG022s A Lever Plug
13 1 A Push Button - Auto
14 1 A Button Spring
15 2 A Screw
16 1 Handle guard

HG616 Issue 10 © 2017 4
PRODUCT SPECIFICATIONS:
Flow Range:
1-25 l/min ( 0.26 – 6.6 US gal/min)
Maximum Pressure:
69 BAR / 6900 kPa / 1000 PSI
Swivel Inlet:
1/2” BSPT or 1/2” NPT
Outlet:
1/2” NPT
Weight:
0.8 kg
Wetted Parts:
Aluminium, Mild Steel, Nitrile Ru er
Fluid Compatibilit : Engine Oil, Diesel Oil, Automatic Transmission Fluid,
Anti-freeze/Anti-Boil - (Maximum Viscosity SAE140)
For Warrant Terms and Conditions see macnaught.com.au
For a list of Australian Service Centres see macnaught.com.au
Note:
This product should be disposed of according to all applicable local
and national government environment regulations and guidelines.