PG450 IM Issue 3 © 2017 Page 3
Gun Operation
Priming the Gun
7) Wipe clean and screw the
barrel
to
the
gun
body
assembly.
8) Repeat steps (7), (8), (9)
“How to install a cartridge”
( Fig 4 )
Pressure Adjustable Switch
Pressure Relief Valve
Air Bleed Valve
Note: If there is still air in the system or gun
does not deliver grease,
a) Remove the flexible extension.
b) Press the trigger on the gun until grease flows
from the gun outlet.
c) Refit the hose assembly to gun.
1) Press the air bleed valve to
expel the air.
2
) Press the trigger on the gun
in short bursts until grease
starts to flow from the grease
coupler.
Pressure Relief Valve
Note: The pressure relief valve located at the front of
the gun and is factory set.
If higher grease pressures are required, the pressure
valve can be adjusted with the adjusting screw
located on the front of the pressure relief valve.
High Pressure / High Volume Switch
b) Switch positioned at “L” (Low volume),
(Flowrate up to 35g/min / Pressure to 9,000psi)
Note: manual adjustment of the pressure relief valve
required for pressures above 6,000psi
a) Switch positioned at “H” (High volume),
(Flowrate up to 120g/min / Pressure to 6,000psi)
Overload Protection
The PG450 is fitted with overload protection
If the motor exceeds the maximum current, the motor
will stop. The motor to resume when safe to do so. .
1) Charge battery ( ref Charge Battery)
2) Insert battery into grease gun
3) Install grease cartridge as described
( ref Installing Grease Cartridge)
4) Prime gun (ref Priming the gun)
5) Insert coupler onto the
grease nipple as shown.
6) Press the trigger on the
gun to dispense grease as
required.
7) When finished greasing, remove coupler as
pictured below
Important:
The gun is designed such that the switch
always be positioned at “H” for normal greasing.
The only time the “L” position is used, is when higher
greasing pressures are required. The pressure relief
valve will require manual adjustment.
