Blower Repair & Maintenance Manual #34-05198-6 v1.2 11.2014
17
Assembly of Blower
(con’t)
STEP
19
20
21
22
23
24
25
26
PROCEDURE
Remove the locknuts and the pipe used in step 9 from the shaft and put the
impellers in 45° position 88, top side of impeller touching bottom side of other
impeller. In this position slide a 0.010” -0.012” feeler gauge between the impellers.
Lay the timing hubs loose on the shafts so that the splines just start on the shaft
splines. Lay the timing gears on the hubs lining up the bolt holes on the gears with
those on the hubs. Draw a line across both gears and shaft ends. Mark gears and
shaft ends 1
– 2 and take gears off, draw a line across hubs lining up with the line
on the shafts, mark hubs 1
– 2 (same as the gears). Heat up the timing hubs and
drive on splined shafts (Make sure the lines previously marked line up).
Lay the timing gears on the hubs making sure that the lines line up, and bolt them on
with 3/8” X 1-1/4” socket head capscrews and timing washers. Hold the impellers
together with 0.010” feeler gauge in between while installing the bolts.
Rotate the impellers while holding a 0.01
0” – 0.012” feeling gauge between center of
impellers. The feeler gauge should slide through evenly while rotating impellers in
either direction. If there is a tight spot while rotating the impellers, loosen the timing
bolts until finger tight and tap on gear carefully using an aluminum bar and hammer
to shift the position of the gear on the hub.
After the timing has been set install
lockwashers
(new) and
locknuts
on gears.
Tighten the timing bolts until they sink into the washers. Install two oil slingers at
front of blower and O-ring on the long shaft above the oil slinger.
Recheck all clearances and if satisfactory reinstall front and rear covers using new
gaskets.
Make sure input seal hole
in the front cover is
centered
around the shaft.
Install new seal .
Fill blower with oil up to its proper level and follow start-up check list.