Operator’s Manual 2020 0217 ENG
19
06
Disassembly and Reassembly
0.003 in. For best results, use feeler gauges
no larger than 0.006 in.
Example: If AA reading is 0.020 in. and BB
reading is 0.008 in., by removing 0.021 in.
shims the reading will change 0.006 in. AA
should read 0.014 in. and BB should read
0.014 in.
Remember to place timing marks on center
and match when removing or installing a gear
(see
Figure 6-4
and
Figure 6-5
).
OTE:
N
Once timing of the rotor has been
completed, check tip-port and tip-dowel
clearance and record along with gear
end and drive end clearances. Tip-dowel
location is when the tip of the rotor
is lined up with the dowel pins in the
housing. Check the clearance as close to
the dowel as possible.
Long
Feeler
Gauge
Record B-B
Reading Here
Record A-A
Reading Here
A
A
A
A
B
B
B
B
A
A
A
A
B
B
B
B
Figure 6-8 – Checking Interlobe Clearance
2. Install the rotor washer and bolt on the gear
end rotor shafts. Tighten securely and install
the O-ring into the cover. Install the gear end
cover to cover the extension, and tighten the
bolts so the cover is fastened securely to the
cover extension.
3. Install the pipe plugs and sight glasses to the
proper location. The direction of
fl
ow of the
blower will determine their location.
