KR8 Issue 10 © 2013
4
TROUBLE SHOOTING GUIDE (CONTINUED)
TECHNICAL SPECIFICATIONS
The KR Grease gun is suitable for use with Macnaught
models K4 and K7 Lubrication systems.
The KR Grease Gun is recommended for use with
greases up to and including NLGI No 2 consistency.
The KR Grease Gun will deliver greasing
pressures up to 10,000 psi (69 MPa) on the high
pressure setting
TROUBLE
CAUSE
REMEDY
D) Gun fails to deliver grease on
the high
volume setting.
A) Dirt on the inlet valve seat (9)
Note: This fault will decrease volume.
A) Remove the control body (16), tap out the valve seat (9),
o’ring (14), ball (13) and spring (12). Clean parts and replace
in the correct order.
B) Operating plunger control (10) sticking
in body (16).
B) Replace the control body assembly.
E) The control push rod in the con-
trol body leaks.
O’ring (15) damaged or worn
Remove the control body and replace worn or damaged parts.
F) The gun leaks at the swivel joint. Worn seals (18,32).
Replace worn or damaged swivel seals
A) Springs (2 or 4) may have collapsed and
is blocking the flow of grease.
A) Fit KR-1K overhaul kit
B) Grade of grease is too heavy.
B) Change grease to NLGI No 2 grease or lighter.
C) To much compression on the outlet
spring (22).
C) Reset the spring keeper screw (Refer to A - a) of the trou-
ble shooting guide) or replace the outlet body assembly.
G) The gun, when on the high vol-
ume setting is too slow or hard to
operate.
For Warranty Terms and Conditions see macnaught.com.au
For a list of Australian Service Centres see macnaught.com.au
