21
06
Disassembly and Reassembly Instructions
Operator’s Manual 2010 Rev B p/n 2010
7. Use one of the following methods to remove
the seal assembly from the drive end of the
end plate:
• Use 4 jacking screws on the end plate to
apply even pressure to the jack screws
to push the end plate from the housing.
Remove the screws. Remove the retainer
plate. Push the rotors out of the gear end
end plate. Remove the bearings and bearing
shield. Save the shims and measure for
proper clearance for rebuilding the blower.
Remove the seal assembly from the end
plate.
• Using a large arbor press, orient the blower
drive shaft down, supported by the ports
and use a straight bar (such as a puller
bar shown in
Figure 6-1
) to put even
pressure on the gear end of the rotors.
Once the rotors are pressed to flush with the
bearings, insert metric bolts into the rotor
or use a spacer slightly smaller than the
shaft diameter to press the rotors through
the bearings. Save shims and measure for
proper clearance for rebuilding the blower.
Remove the seal assembly from the end
plate.
• Reverse the machine to drive the shaft up
and press each rotor free from the drive end
end plate.
Figure 6-2 – Gear Alignment
Figure 6-3 – Lobe Keyway Position
8. Remove the seals from the rotors with a plastic
mallet or by tapping toward the end of the rotor
shaft.
9. Remove the bearings, bearing shield, and seal
assembly out of the free end end plates.
A
A
A
A
B
B
B
B
A
A
B
B
Long
Feeler
Gauge
Record A-A Reading Here
Record
B-B
Reading
Here
A
B
A
A
B
B
A
A
A
B
B
B
DRIVE
DRIVEN
DRIVE
DRIVEN
Figure 6-4 – Checking Rotor Interlobe Clearance
10. Use a hammer and brass bar to drive bearing
and seal housing from end plates. Inspect
bearing wear pattern and seal for wear and
heat marks. Clean all parts before inspecting.
Check the rotors’ bearing and seal fits for
bearing spinning along with the seal housing
on the rotor shaft. Check the bearing bores
and seal bores in the end plate for spinning of
bearings and seal housing.
Summary of Contents for 3200
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