27
MAINTENANCE SECTION
4.
Stand the Rear Gear Case or the Front Gear Case (87)
on the table of an arbor press with the output spindle
upward. Using a rod that neatly fits inside the
internal hex of the Spindle (42 or 88), press the Rear
Spindle Assembly out of the Spindle Bearing (44) or
the Intermediate Spindle Assembly out of the
Intermediate Spindle Bearing (92).
Do not remove the Bearing in the following step
unless you have a new replacement available for
installation. The Bearing will be damaged by the
removal process.
5.
Invert either Gear Case on the table of an arbor press
so that the end face having four notches makes
contact with the table. Using a rod against the inner
race of the Rear or Intermediate Spindle Bearing,
press the Bearing from the Gear Case.
6.
If the Spindle Bearing Seat (45A or 91) must be
replaced, use a small, thin blade screwdriver to spiral
it out of the groove in the Gear Case.
Disassembly of the Motor
1.
Using snap ring pliers, remove the Rear End Plate
Assembly Retainer (24) from the shaft of the Rotor
(28).
2.
Pull the Rear End Plate Face Plate (23) and Rear End
Plate Assembly (22) off the hub of the Rotor.
3.
Lift the Cylinder (25) from the Rotor.
4.
Remove the Vanes (29) from the Rotor.
5.
Support the Front End Plate Assembly (30), as near
the rotor body as possible, on the table of an arbor
press and press the Rotor from the Front Rotor
Bearing (32). Remove the Bearing from the Front
End Plate.
Disassembly of the Housing
1.
Pull the Reverse Lever (20) off the inlet end of the
Motor Housing (1).
2.
Using a #2 Phillips Head Screwdriver, unscrew and
remove the Housing Screw (3).
3.
Insert a 5/16” wooden dowel between 6 and 8 inches
long, into the inlet end of the Motor Housing and
push the Reverse Valve Assembly (4) out the motor
end of the Housing.
4.
Use a hooked tool to pull the Housing O–ring (2) out
of the Motor Housing.
ASSEMBLY
General Instructions
1.
Always press on the inner ring of a ball–type bearing
when installing the bearing on a shaft.
2.
Always press on the outer ring of a ball–type bearing
when pressing the bearing into a bearing recess.
3.
Whenever grasping a tool or part in a vise, always use
leather–covered or copper–covered vise jaws to
protect the surface of the part and help prevent
distortion. This is particularly true of threaded
members and housings.
4.
Except for bearings, always clean every part and wipe
every part with a thin film of oil before installation.
5.
Apply o–ring lubricant to all o–rings before final
assembly.
6.
Check every bearing for roughness. If an open
bearing must be cleaned, wash it thoroughly in a
clean, suitable cleaning solution and dry with a clean
cloth. Sealed or shielded bearings should never be
cleaned. Work grease into every open bearing before
installation.
Assembly of the Housing
1.
Lubricate the Housing O–ring (2) with o–ring
lubricant and install it at the bottom of the cylinder
bore in the Motor Housing (1).
2.
Inspect the face of the Reverse Valve Assembly (4)
and Reverse Valve Seal (5) for nicks or damage.
Replace the Reverse Valve Assembly or Seal if any
damage is evident.
3.
Lubricate the Seal on the hub of the Reverse Valve
Assembly with o–ring lubricant and insert the
Assembly, Seal end leading, into the cylinder bore of
the Motor Housing. Push the Assembly toward the
bottom of the cylinder bore until it “snaps” into its
proper location.
4.
Rotate the Valve inside the Housing until the threaded
hole into the side of the Valve for the Motor Housing
Screw (3) aligns with the hole in the Motor Housing.
5.
Using a #2 Phillips Head Screwdriver, thread the
Motor Housing Screw into the Reverse Valve
Assembly through the Housing until the underside of
the screw head stops against the Housing. Back the
Screw out of the Valve between 1/4 and 1/2 turn.
6.
Align the open end of the slot inside the Reverse
Lever (20) with the head of the Housing Screw.
From the inlet end of the Housing, slide the Lever
onto the Housing, making certain the screw head
enters the slot, and move it along the Housing until it
stops against the housing shoulder.
7.
Rotate the Lever to make certain the Valve only has
slight resistance.
Assembly of the Motor
1.
Place the Front End Plate (30) on the splined shaft of
the Rotor (28) with the bearing recess away from the
rotor body.
2.
Place the Front Rotor Bearing (32) onto the shaft and
using a sleeve or piece of tubing that contacts the
inner race of the Bearing, press the Bearing onto the
shaft until the Front End Plate nearly contacts the
rotor body.
