f.
Invert housing (28) on work surface. Apply a small amount of grease to a new seal (27) and press the seal into
the housing. Be sure seal is not cock or deformed when installed.
g.
Clamp housing (28) in soft-jawed vise, clamping on mounting flange, with coupling shaft bore down.
NOTE
The assembly of the rotor set (16) should be done at this time in order to use the housing in
the vise as an assembly "fixture."
h.
Place wearplate (20) then stator (19) on the housing (28) and align the screw holes. Insert two screws (13) finger
tight approximately 180 apart to retain the parts in place.
i.
Assemble the rotor (18) into the stator (19) with six vanes (17), or as many as will readily fit, into the stator vane
pockets.
NOTE
The drive link (23), held in large locking pliers between two rods or nails to protect the drive
link splines, will be required to rotate the rotor.
j.
Rotate the rotor (18) with the drive link (23) to seat the rotor and assembled vanes into the stator (19). Assemble
the seventh, or remaining, roller vanes (17) using minimum force.
CAUTION
Too much force used to push the rotor vanes into place could shear off the coating applied to
the stator vane pockets. Use care during this procedure to prevent damage to rotor set and
the drive link splines.
k.
Remove the drive link (23), the two screws (13), then the assembled rotorset (16) and wearplate (20)as a unit
from the housing and set them aside for later installation.
NOTE
The coupling shaft (25) has a timing mark on the small (output) end that is radially in line with
two internal spline teeth and a "commutator drive pin slot" that transverses the opposite end
of the coupling shaft. The "commutator drive pin slot" indicated by the timing mark is the
only slot of two oil passage slots across the large end of the coupling shaft, wide enough to
engage the commutator drive pin (26) at assembly. This orientation of the coupling shaft
splines and drive pin slot is important to subsequent assembly procedures that will produce
the required rotor (18) lobe and commutator (24) "fixed" radial relationship at assembly.
Using chalk or marking pencil, extend the timing mark that is on the end of coupling shaft (25)
up the side of the coupling shaft so that the timing mark location will be visible for alignment
purposes when the coupling shaft is assembled into the housing held in the vise.
4-110
