Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
R
Page 61
NOTE: Inspect the Clutch Halves' for cracks and also 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 Hydro-Hot's
"Parts Manual" for spare parts information.
6. Remove the four Blower Housing Screws that secure the Blower
Housing to the Blower Casing, reference Figure 23. Remove the
Blower Housing so that the Combustion Air Blower is exposed,
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 Casing and loosen the Retaining Nut
located in Side-A of the Blower Casing. 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 that the
Combustion
Air Blower can be easily removed from the Blower
Casing.
8. With a pair of snap-ring pliers, remove the Snap Rings from both
Side-A
and Side-B of the Blower Casing, reference Figure 23. Push
all the contents of the Bearing Kit out of the Blower Casing's bore /
bearing cavity. Discard the Retaining Nut, steel Drive Gear, Snap
Rings, Bearings, Spacer Tube, and Washers, as replacements are
provided in the new Bearing Kit.
NOTE:
Be sure to inspect the Blower Casing's bore / bearing cavity for
signs of damage due to potentially seized Bearings. If damage is
present, the Blower Casing must be replaced. Reference the Hydro-
Hot's "Parts Manual" for spare parts information.
9. Install a new Snap Ring into Side-A of the Blower Casing, refer-
ence
Figure 23. Once the Snap Ring is in place, insert the remain-
ing contents of the new Bearing Kit into Side-B of the Blower
Casing, 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: Reference Figure 23 for exact placement of the three Washers that
slide over the threaded end of the Combustion Air Blower's shaft
prior to installation. 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 Hydro-Hot's "Parts Manual" for spare parts
information.
10
. Slide the Combustion Air Blower's shaft (with the three washers) up
Section 8: Diesel-Burner Service, Maintenance, and Repair Information
Bearings,
continue
d