9
MAINTENANCE SECTION
For Models with 167 ratios,
pull the three Gear
Head Planet Gear Assemblies (20), Gear Head (17),
Gear Head Spacer (26), three Intermediate Gear Head
Planet Gear Assemblies (24), the Intermediate Gear
Head (23), Gear Head Spacer (26) and three Spindle
Planet Gear Assemblies (30) from the Gear Case.
14. Using a thin blade screwdriver, pry one of the Cou-
pling Nut Retainers (34) out of the Groove in the
Gear Case and slide the two Coupling Nuts off the
Gear Case.
15. Grasp the shaft of the Rotor (6) in copper--covered
vise jaws and pull the Motor Housing (1) off the as-
sembled motor unit.
16. Pull the Front End Plate Assembly off the Rotor.
17. Remove the two Front End Plate Seals (11) from the
Front End Plate (10).
18. Push the Front Rotor Bearing (12) out of the Front
End Plate.
19. Separate the Cylinder (8), Vanes (7) and Cylinder
Dowel (9) from the Rotor.
20. Remove the Rear End Plate Gasket (4) from inside
the Motor Housing.
21. If the Rear Rotor Bearing (3) or Rear End Plate (5)
must be replaced, use a wrench to remove the Rear
Rotor Bearing Retaining Nut (2).
22. Supporting the End Plate near the rotor body on the
table of an arbor press, press the Rotor from the End
Plate and Bearing.
ASSEMBLY
General Instructions
1. Keep work area and tools neat and clean. Do not
remove protective covering from parts, especially
bearings, until the time of installation.
2. Unless otherwise noted, always press on the stamped
end of a needle bearing when installing needle bear-
ing in a recess.
3. Always press on the inner ring of a ball--type bearing
when installing the bearing on a shaft.
4. Always press on the outer ring of a ball--type bearing
when installing the bearing in a bearing recess.
5. Check every bearing for roughness. If an open bear-
ing must be cleaned, wash it thoroughly in clean sol-
vent and dry it with a clean cloth. Work grease thor-
oughly into every open bearing before installation.
Sealed or shielded bearings should ever be cleaned.
6. Except for bearings, always clean every part and wipe
every part with a thin film of oil before installation.
7. When grasping a Motor or one of its parts in a vise,
always use leather or copper vise jaws covers to pro-
tect the surface of the part and reduce the likelihood
of damage. This is particularly important when
clamping threaded members, shafts with splines, etc.
8. Apply O--ring lubricant to each O--ring before assem-
bly and use only new gaskets when reassembling the
Motor.
Assembly of the Motor
1. Place the Rear End Plate (5), porting slots leading,
onto the threaded hub of the Rotor (6). Position the
Rear Bearing (3) on the hub and using a sleeve that
contracts the inner ring of the Bearing, press the
Bearing onto the hub to within 1/32” (1 mm) of the
Rear End Plate.
2. Place the Retaining Nut Washer (2A) over the hub
against the Bearing. Insert a 0.001” feeler gauge or
shim between the face of the Rotor and End Plate.
Thread the Rear Rotor Bearing Retaining Nut (2)
onto the hub of the Rotor and tighten until the feeler
gauge has a slight drag during removal. The Rotor
must spin freely while holding the End Plate.
3. Lightly grasp the threaded hub of the Rotor in cop-
per--covered vise jaws with the splined hub upward.
4. Wipe each vane (7) with a film of light oil and place a
Vane in each slot in the Rotor.
5.
For reversible models,
align the cylinder dowel hole
in the Cylinder (8) with the hole in the Rear End Plate
and install the Cylinder over the Rotor and Vanes
against the End Plate.
Nonreversible Cylinders have a drill point mark at
one end of the three hole string portion of the five
hole pattern. When the mark is near the Rear
End Plate, rotation will be forward; when near the
Front End Plate, rotation will be reverse.
For nonreversible models,
the installation of the
Cylinder (8) determines the rotational direction of the
motor. Looking past the rotor body and vanes, align
the cylinder dowel hole in the Rear End Plate at
twelve o’clock. There are five holes drilled crosswise
into the Cylinder. Align the cylinder dowel hole in
the Cylinder with the hole in the Rear End Plate and
install the Cylinder over the Rotor and Vanes against
the Rear End Plate. If the five holes are at the three
o’clock side of the assembly, the rotational direction
will be forward (right hand). Rotational direction
will be reverse (left hand), if the holes are at the nine
o’clock side of the assembly. To change rotational
direction, remove the Cylinder, turn it end for end
and reposition it in the assembly.
6. Install the two Front End Plate Seals (11) in the annu-
lar grooves in the Front End Plate (10).
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