PROBLEM
CAUSE
REMEDY
1) Air motor runs but does not pump
grease
2) Air motor runs slower than
normal
3) Air motor cycles intermittently
when not using the pump
4) Grease leaks out of the seal
condition hole
5) Gun leaks continuously out of the
coupler
6) Air leaks continuously from the
valve body cover
7) Air motor does not operate, but
will cycle when the reset button is
pressed
8) Air motor does not operate or
cycle when the reset button is
pressed
a) The grease is too thick or too cold
b) The grease container is damaged
causing the follower to stop
a) The air pressure is too low
a) Grease leaking at hose (19) and or
swivel (86/87) connections
b) Grease leaks at B2 Gun coupler (68)
c) Grease leaks at the seal condition hole
d) High pressure seal (45) worn or
damaged
a) Small quantity of grease indicates seal
lubrication is OK
b) Continuous ‘worm’ of grease indicates
the seal is worn or damaged
a) Incorrect trigger adjustment
b) Bent or damaged plunger
a) Replace worn air piston cup seals (10)
and / or piston (11)
a) The spool (34) is jammed in the valve
body (30)
a) Lower poppet spring (4) is fatigued
b) Top poppet spring (4) is fatigued
a) Use NLGI no 2 or thinner grease.
Store grease in a warm place
b) Repair or replace container.
Follower must be able to move
freely.
a) Increase air pressure, Minimum is
400 kPa/ 60 psi/ 4 bar, Maximum is
1000 kPa/ 150 psi/ 10 bar.
a) Check all connections. Use
thread sealant and tighten leaking
connections.
b) See ‘Problem 5’ below
c) See ‘Problem 4’ below
d) Replace high pressure seal (45)
a) No action required
b) Replace Piston rod seal (18)
a) Adjust the trigger to alow 3 to
6mm (1/8” to 1/4”) free movement
b) Replace plunger (60)
a) replace cup seals and / or piston
a) i) Push the reset button
ii) If the motor starts, disconnect
the air line and apply 3 or 4 drops
of light oil to the air inlet of the
pump
a) Replace the bottom poppet spring
b) Replace the top poppet spring
iii) If the motor does not start,
follow ‘Pump unit disassembly’
steps 1,2 and 4 through 7
iv) Replace spool (34) and clean
valve bore
v) When re-assembled, apply 3 or 4
drops of light oil to the air inlet
of the pump
TROUBLE SHOOTING GUIDE
7
