Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 8: DIESEL-BURNER SERVICE, MAINTENANCE, AND REPAIR INFORMATION
Bearings,
continued
NOTE:
Inspect the
Clutch Halves
for cracks and ensure that the flat portion
in each shaft hole is free of wear and tear. Too much play on the shaft
produces a loud clacking noise. If any cracks or wear are detected, the
Clutch Half
must be replaced. Reference the Aqua-Hot’s “Parts Manual”
for spare parts information.
6.
Remove the four
Blower Housing Screws
, which secure the
Blower
Housing
to the
Blower Casting
; reference Figure 23. Remove the
Blower
Housing
to expose the
Combustion Air Blower
; reference Figure 23.
NOTE:
Be sure to observe the placement of the three
Washers
of the Bearing
Kit illustrated in Figure 23. To ensure proper tension, the same order
and direction of the dished surfaces of the
Washers
must be followed
when reassembling.
7.
Hold Side-B of the
Blower Casting
and loosen the
Retaining Nut
located
in Side-A of the
Blower Casting
. Remove the
Retaining Nut
, steel
Drive
Gear
, and thick
Flat Washer
from the Combustion Air Blower’s shaft.
Lightly tap the threaded end of the shaft so the
Combustion Air Blower
can be easily removed from the
Blower Casting
.
8.
With a pair of Snap-Ring pliers, remove the
Snap Rings
from both Side-A
and Side-B of the Blower Casting; reference Figure 23. Push all the
contents of the Bearing Kit out of the Blower Casting's bore/bearing
cavity. Discard the
Retaining Nut
, steel
Drive Gear
,
Snap Rings
,
Bear-
ings
,
Spacer Tube
, and
Washers
, as replacements are provided in the
new Bearing Kit.
NOTE:
Be sure to inspect the Blower Casting’s bore/bearing cavity for signs of
damage due to potentially seized
Bearings
. If damage is present, the
Blower Casting
must be replaced. Reference the Aqua-Hot’s “Parts
Manual” for spare parts information.
9.
Install a new
Snap Ring
into Side-A of the
Blower Casting
; reference
Figure 23. Once the Snap Ring is in place, insert the remaining
contents of the new Bearing Kit into Side-B of the
Blower Casting
starting with the
Wave Washer
, as illustrated in Figure 23. Secure the
Bearing Kit assembly in place with the remaining
Snap Ring
(Side-B).
NOTES:
A:
Prior to installation, reference Figure 23 for the exact placement of
the three
Washers
, which slide over the threaded end of the Com-
bustion Air Blower’s shaft. Failure to follow the correct order and
direction of the dished surfaces on the
Washers
will result in a
restricted rotation of the
Combustion Air Blower
.
B:
Inspect the
Combustion Air Blower
for warpage and/or damage. If
warpage or damage is visible, the
Combustion Air Blower
must be
replaced. Reference the Aqua-Hot’s “Parts Manual” for spare parts
information.
10.
Slide the Combustion Air Blower’s shaft (with the three washers) up
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