KR8 Issue 10 © 2013
1
KR PRESSURITE™ GREASE GUN
INSTRUCTION MANUAL
INTRODUCTION
Thank you for purchasing a Macnaught KR PRESSUR-
ITE Grease gun . The KR PRESSURITE grease gun has
been designed for use with the Macnaught model K7
Mini-Lube and K4 Super-Lube Manual Greasing
Systems.
Please read and retain this instruction manual to assist
you in the operation and maintenance of this quality
product.
GENERAL INFORMATION
This manual assists you in operating and maintaining your
new KR PRESSURITE grease gun. The information con-
tained in this instruction manual will help you ensure many
years of dependable performance and trouble free opera-
tion.
Please take a few moments to read through this manual
before operating your KR grease gun. If you experience
problems with the product, refer to the Maintenance and
Trouble Shooting sections of this manual. If you require any
further assistance please contact your local Macnaught dis-
tributor or Macnaught.
DESCRIPTION
The KR PRESSURITE grease gun is a High Pressure / High
Volume grease gun. When set on the high pressure setting
you can reach greasing pressures up to 10,000psi (69 MPa).
The KR PRESSURITE gun is normally operated on the HI-
VOLUME switch position. Should high pressure be required
to clear a blocked or seized grease nipple, simply push the
switch on the gun to the HI-PRESSURE position.
Note: To select either high pressure or high volume, refer to
Fig 1.
KR PRESSURITE GUN FEATURES
Operation on the High Pressure Setting
1) The switch is pushed forward and lifts ball ‘A’ off its seat.
2) As the piston is pushed forward by the handle, the grease
in chamber 1 is pushed back past ball ‘A’ into the supply hose.
3) The grease in chamber 2 (small volume) is pressurised up
to 69MPa (10,000 psi). This pressure seats ball B and lifts ball
C, then forces grease through to the equipment being
greased.
Grease under pressure
Up to 1034kPa
(150 PSI) hose pressure
Grease under pressure
Up to 69MPa
(10000 PSI) hose pressure
Grease supplied from K4or K7
Pump via hose at a pressure of
1034kPa (150 PSI
HANDLE
PISTON
SWIT
CH
FOR HIGH
PRESSURE
ON HIGH PRESSURE
CHAMBER 1
CHAMBER 2
C
B
A
HIGH
PRESSURE
HIGH
VOLUME
(Fig 1)
