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1.To remove the dosing chamber from the
gun, turn the dose-setting knob clockwise.
This extends the dosing chamber to the
maximum length.
Once the dosage chamber has been disassembled, the piston
can be removed. This is done by sliding the piston out from
the 'horseshoe'.
2.The O-ring can now be removed using pincers or another tool.
Take care: do not damage or remove the white spacer rings
.
Base of the
piston
'Horseshoe' inside
the P50