32
08
Disassembly and Reassembly
Manual 2008 Rev A p/n 2008
marks. Using the same puller, remove the gear
hub and solid gear.
13. Remove cap screws and retainer rings.
End Plate and Rotor Disassembly
14. Stand blower on its free end on 4 in. × 4
in. (102 mm × 102 mm) blocks and remove
mounting feet.
15. Remove the end plate cap screws. The end
plate with the bearing must be pulled from
the rotor shafts. Use two fixtures as shown
in
Figure 13-2 on page 43
. Secure each
fixture to the bearing retainer bolt holes and
apply pressure to the end of the rotor shaft with
the center screws or the nuts on the threaded
rod. The pressure must be applied equally to
each shaft. When the end plate is removed,
tap out the bearing seals. Remove retainer
rings and tap out labyrinth seals.
16. Install the end plate to the housing without
bearings, and secure with six cap screws. Turn
the blower over and support with blocks under
the gear end plate.
17. Remove cap screws, oil retainer ring, and end
plate cap screws. Remove the end plate using
the same tool used on the gear end. Remove
the bearings and seals. Discard all O-rings.
18. Lift the rotors out of the housing. Unbolt the
gear end plate and lift off the housing.
19. Clean, deburr, polish, and inspect all parts for
wear and serviceability.
OTE:
N
Check orifice in end plates and gear cover
for blockage on units with external oil
lines.
ASSEMBLY OF BLOWER
The assembly procedure is generally the same for
all series, but notations are made where there are
differences.
When sealing the joints between the housing,
end plates, end covers, and port fittings, an RTV
Silicone sealer or the equivalent is required. On
some units, O-rings are used to seal between the
housing and the end plates. Dowel pins are used to
locate the end plates, housing, and drive end cover
in proper location relative to each other. Be sure
the dowel pins are in place.
It is recommended that only factory parts be used
when repairing a unit. This will ensure the proper
operating clearance needed for your unit to operate
properly.
On lip seal units, properly polish the seal
journals to remove any scratches or burrs.
Failure to polish will result in leakage and/or
damage to the seals.
Preparation of End Plates for Assembly
1. Make sure all parts are clean and free of
nicks or burrs caused by disassembly.
See
Figure 8-2
and
Figure 8-3 on page 34
for
dimension of seal pressing tools.
2. Position end plates with bearing bores up.
Press labyrinth seals into seal bores of both
end plates. Install retainer ring.
Lip Seal Installation
(Series 17/19/46/86)
3. Apply a thin coat of sealer on the outside
diameter of the seal. Press into the seal bore
with the lip seal facing toward the bearing.
Lubricate the lip seal with grease only.
Summary of Contents for PD Plus 9000 Series
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