For assembly purposes, measure the distance
adjustment screw (2) and maximum displacement
adjustment screw (12) to housing (1) before
removing the adjustment screws.
Loosen nut (3), and remove minimum displacement
adjustment screw (2) from housing (1).
Loosen nut (13), and remove maximum displacement
adjustment screw (12) from housing (1).
Remove O-ring seal (6) from housing (1). Check the
O-ring seal for wear or damage and replace if
Remove retaining ring (9), shim (10) and shaft seal (11)
from housing (1).
Remove cylinder block (67), spring (63) and spring
collar (66) from pistons (64) and center pin (60). The
spring and spring collar will remain in the center hole of
the cylinder block.
Position housing (1) in a press as shown. Use the press
to remove rotating group (4) from housing (1). To
prevent damage to pistons (64) and shaft assembly
(59), support the shaft assembly inside the housing
while it is being removed.
Remove 14 screws (62), and remove seven pistons
(64), center pin (60) and retaining plate (65) from shaft
Check seven pistons (64) at areas (X) for scratches and
pitting. If necessary, replace the pistons.
Piston rings (61) may break apart during removal from the
pistons. If the rings are to be removed, wear eye
protection to prevent possible personal injury from flying
Use a screwdriver to remove piston rings (61) from each
of the seven pistons.