Blower Repair & Maintenance Manual #34-05198-6 v1.2 11.2014
16
ASSEMBLY OF BLOWER
(con’t)
STEP
8
9
10
11
12
13
14
15
16
17
18
PROCEDURE
Drive cartridge onto shafts with a driver, make sure the cartridges with the retainer
rings are on the splined end of the shafts.
At this time only the cartridges on the front of (drive end) the blower are to be bolted
down using 5/16” X 1” nylock socket head capscrews.
Cut two pieces of pipe* 1-
1/2” long 1-3/8” O.D. to fit over splined end of shaft and
long enough to allow end lock nut to be put on. Tighten locknuts to hold bearing tight
on shaft.
*(Used for assembly purpose only.)
Install two long bolts in threaded holes in rear cartridges. (Do not tighten) Make sure
threaded holes run from left bottom to right top when blower is lying flat. This is to
allow shims to clear bolts.
Check clearance between the impeller and the housing by sliding a feeler gauge
between impeller and housing, and rotate impeller in casing, doing so at all four
corners, top and bottom. Impellers have to be centered in housing with not less that
.
007” clearance. If improper clearance cannot be achieved remove the dowel pins
and follow step 13 and 14.
If new headplates or new housing are used adjust the headplates by tabbing them
from side to side and up and down until centered in housing with not
less than .077”
clearance.
Tighten the four capscrews in each headplate and check clearances again, if they
are satisfactory drill and ream new holes for the 5/16” dowel pins, these pins are
press fitted.
After impeller to housing clearances are set, tighten the two long bolts in the
cartridges lifting the cartridges away from the headplate.
Slide shim between cartridges, approximately 0.015” less that clearance between
flange of the cartridge and headplate. Make sure the same thickness of shims are
used on each side of each cartridge. Loosen the long bolts in the cartridges and bolt
the cartridges to the headplate.
Check with a feeler gauge inside at the gear end between each impeller and
headplate, it must have 0.008” clearance. If the clearance is not 0.008” adjust by
adding or removing shims. When the gear end is adjusted, check clearance on drive
end of blower to be not less than 0.012”. If it is less than 0.012” a gasket has to be
installed between the headplate and the housing.
Once the clearances have been set between the impellers and endplates remove the
two long bolts from each cartridge and install
new
5/16” X 1” nylock capscrews to
bolt cartridge to headplate.