19
MAINTENANCE SECTION
6.
Grasp the Arbor in leather–covered or copper–cov-
ered vise jaws with the collet end downward. Using
an adjustable wrench, unscrew and remove the Bevel
Gear Nut (28) and lift the Bevel Gear off the Arbor.
7.
If the Lower Arbor Bearing (29) must be replaced,
use a piece of tubing to support the Bearing on the
table of an arbor press and press the Arbor from the
Bearing.
Disassembly of the Motor
1.
Pull the Flange (19) and Flow Ring (18) off the front
of the Motor Housing (5).
2.
Grasp the Bevel Pinion (21) and pull the assembled
motor out of the Motor Housing. Remove the two
Rear Rotor Bearing Spacers (10) from the bottom of
the Housing.
3.
Remove the Vanes (13) from the Rotor (12).
4.
Grasp the Rotor in leather–covered or copper–covered
vise jaws with the Bevel Pinion upward. Using a 1/2”
wrench, unscrew and remove the Bevel Pinion (21).
5.
If the Front Rotor Bearing (17) must be replaced, sup-
port 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 Ro-
tor from the Bearing and End Plate. Remove the Front
End Plate Spacer (15) and Front Seal Assembly (16)
from the hub of the Rotor.
6.
If the Rear Rotor Bearing (9) must be replaced, use
snap ring pliers to remove the Rear Rotor Bearing
Retainer (11) and then remove the two Rear Rotor
Bearing Spacers (10).
7.
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 (4D), Throttle
Valve Spring (4C) and Throttle Valve (4B) from the
Motor Housing.
4.
If the Throttle Valve Seat (4A) must be replaced, in-
sert 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 Cartridge Case (4) must be re-
placed, 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.
6.
Press the Throttle Lever Pin (7) from the Housing and
remove the Throttle Lever (6). Remove the Throttle
Valve Plunger (8).
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. Take
extra care not to damage threads or distort housings.
4.
Always clean every part and wipe every part with a
thin film of the recommended oil before installation.
5.
Check every bearing for roughness. If an open bearing
must be cleaned, wash it thoroughly in a clean, suit-
able cleaning solution and dry with a clean cloth.
Sealed or shielded bearings should not be cleaned.
Work grease into every open bearing before installa-
tion.
6.
Apply a film of O–ring lubricant to every O–ring
before installation.
7.
Unless otherwise noted, always press on the stamped
end of a needle bearing when installing a needle bear-
ing into a recess. Use a bearing inserting tool similar
to the one shown in Dwg. TPD786.
(Dwg. TPD786)
SHOULDER TO
REGULATE DEPTH
PILOT TO FIT I.D. PF BEAR-
ING. LENGTH OF PILOT TO
BE APPROXIMATELY 1/8”
LESS THAN LENGTH OF
BEARING,
NEEDLE BEARING INSERTING TOOL
