Standard Operation Procedure
6
Removing the Product Pistons
To remove the product pistons, change the
stroke-adjust to allow the strong back to come
all the way back. Once the strong back is in its
rear most position, remove the pins from the
piston rods and pull them out of the strong
back.
Figure 7: Removing the Product Pistons
Checking the Product Pistons
Once the product pistons are out, check to see
if there is any damage to the piston or O-rings.
If the O-rings show any signs of wear (i.e.
knicks, gouges, grooves, or flat spots) then
they will need to be replaced.
Figure 8: Checking the Product Pistons
Replacing Product Piston O-Rings
If O-rings show any signs of wear, they should
be replaced immediately. When replacing or
reinstalling O-rings onto the pistons, be sure
to use Petrol-Gel to lubricate the O-rings as
you put them on.
Figure 9: Replacing Product Piston O-Rings
