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5. Using one Collet Wrench to hold the Extension Arbor
(31) and a 7/16" socket, unscrew the Arbor Bearing
Nut (30).
6. Grasp the collet end of the Arbor and pull it from the
Arbor Housing Assembly (32) being careful not to
allow the Rear Arbor Bearing (29) to fall from the
Housing. Remove the Bearing from the Housing.
7. If the Front Arbor Bearing (33) must be replaced,
press it from the Arbor Housing.
8. Pull the Flange (19) and Flow Ring (18) off the front
of the Motor Housing (5).
9. Grasp the Arbor Bearing Nut on the rotor shaft and
pull the assembled motor out of the Motor Housing.
Remove the Motor Housing from the vise and remove
the two Rear Rotor Bearing Spacers (10) from the
bottom of the Housing.
10. Remove the Vanes (13) from the Rotor (12).
11. Grasp the Rotor in copper–covered or leather–covered
vise jaws with the Arbor Bearing Nut upward. Using
a 7/16" wrench, unscrew and remove the Arbor
Bearing Nut.
Steps common to ALL models
1. If the Front Rotor Bearing (17) must be replaced,
support the Front End Plate (14) between two blocks
on the table of an arbor press. Place the blocks as
close to the body of the Rotor as possible and press
the Rotor from the Bearing and End Plate. Remove
the Front End Plate Spacer (15) and Front Seal Cup
(16) from the hub of the Rotor.
2. If the Rear Rotor Bearing (9) must be replaced, use
snap ring pliers to remove the Rear Rotor Bearing
Retainer (11).
3. Using a bearing puller, pull the Rear Rotor Bearing
off the hub of the Rotor.
Disassembly of the Inlet and Throttle
1. Using a 3/4" wrench, unscrew and remove the Inlet
Assembly (1).
2. Remove the Inlet Seal (3) and Inlet Screen (2) from
the Inlet.
3. Remove the Throttle Valve Spring Seat (4A), Throttle
Valve Spring (4B) and Throttle Valve (4C) from the
Motor Housing (5).
4. If the Throttle Valve Seat (4D) must be replaced,
insert a hooked tool through the central opening of the
Seat and, catching the underside of the Seat, pull it
from the Housing.
5. If the Throttle Valve Case (4) must be replaced, insert
two hooked tools through the central opening of the
Case approximately 180 degrees apart and, catching
the underside of the Case, pull it from the Housing.
MAINTENANCE SECTION
6.
General Instructions
1.
2.
3.
4.
5.
6.
7.
26
Press the Throttle Lever Pin (7) from the Housing and
remove the Throttle Lever (6). Remove the Throttle
Valve Plunger (8).
ASSEMBLY
Always press on the inner ring of a ball–type bearing
when installing the bearing on a shaft.
Always press on the outer ring of a ball–type bearing
when pressing the bearing into a bearing recess.
Whenever grasping a tool or part in a vise, always use
leather–covered or copper–covered vise jaws. Take
extra care not to damage threads or distort housings.
Always clean every part and wipe every part with a
thin film of oil before installation.
Check every bearing for roughness. If an open
bearing must be cleaned, wash it thoroughly in clean
solution and dry with a clean cloth. Sealed or
shielded bearings should not be cleaned. Work
grease into every open bearing before installation.
Apply a film of o–ring lubricant to every o–ring
before installation.
Unless otherwise noted, always press on the stamped
end of a needle bearing when installing a needle
bearing into a recess. Use a bearing inserting tool
similar to the one shown in Dwg. TPD786.
Needle Bearing Inserting Tool
SHOULDER TO
REGULATE DEPTH
PILOT TO FIT I.D. OF
BEARING.
LENGTH OF PILOT TO BE
APPROXIMATELY 1/8"
LESS THAN LENGTH OF
BEARING
(Dwg. TPD786)
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