Mc Leod Piston Seal Replacement - Manual (Page 2)

Step 4 Remove the O-Ring from the Piston Groove. Install new O-Ring from kit.
Step 5 Remove the Quad Ring from the ID of the Upper Housing. A small pick can be used to expose a
small cross section of the seal to grab with your fingers. Do not cut or pierce the quad ring. Do not gouge
the seal groove or housing. Remove the large O-Ring from the bottom of the Upper Housing.
Figure 3 Bolt-On Style Shown Figure 4
Step 6 Place the Upper Housing and hose assembly up-side down on a piece of 1”x 2” wood block or
similar material. Using a small diameter ‘drift’ or punch (1/8” or smaller), drive the Spring Pins through
the Upper Housing from the bottom. See Figure 4. The swivel fittings and hose will pull out of the Upper
Housing. A small pick can be used to remove the small quad ring fitting seal from the housing. Repeat for
second hose/fitting assembly.
Step 7 Remove metal clad oil seal from center of Lower Housing. Note location of seal depth, some are
all the way down to the step in the housing, some are 1/16”down and some flush with the top of the bore.
Make a note for you to reference when reinstalling the seal. You can use a socket with a 1-3/4” OD to
drive the seal out of the housing from the upper side. Gently tap the seal out. Remove Quad seal from OD
of Lower Housing.
Figure 5 Bolt-On Bearing Shown Seal Guide Figure 6