10
TO REPLACE THE PISTON SEAL
Periodically the piston seal will need
replacing. To do this first ensure that the
sprayer has been thoroughly cleaned through
with water and emptied. Hold the trigger
valve open to release any pressure.
Remove the split pin and detach the pump
connection rod from the top of the piston.
Withdraw the piston as shown and examine
the seal for signs of wear and damage. If the
seal needs replacing use a thin screwdriver or
similar to unscrew the slotted nut which
retains the seal as shown. Take great care
that the brass ball does not drop out. Check
the brass ball for signs of pitting and replace
if necessary.
The old piston seal can be easily removed
and replaced. Smear a small amount of
grease or oil around the piston seal to aid re-
assembly.
Replace the piston seal and tighten the
slotted nut connection, ensuring the brass
ball is correctly sealed as shown.
Replace the piston in the tank ensuring that it
correctly locates and it slides into the piston
chamber.
Reattach the pump connection rod and split
pin.
Before using again test the sprayer with
water.
