Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03

Page 60

Section 8: Diesel-Burner Service, Maintenance, and Repair Information

Bearings

8.9 Bearings

Function: The Bearings support the Combustion Air Blower's shaft and

allows the blower to turn smoothly.

NOTE: In order to perform some of the following procedures it is neces-

sary to detach and reattach the Diesel-Burner Head. Be sure to review

Section

8.2, Page 42 for detaching and reattaching instructions.

Function Test: Remove the Motor (reference Section 8.3, Page 45 for the

Motor's "Replacement Procedure") and spin the Combustion Air Blower by

hand (place one of the Clutch Halves to the end of the shaft to assist with

this spinning exercise). If the Combustion Air Blower rotates smoothly

without any friction or noise, the Bearings are in proper working condition.

However, if the Combustion Air Blower does not rotate smoothly and/or

produces noise, the Bearings are worn and must be replaced, reference

the Bearings "Replacement Procedure" below.

Component Test: N/A

Cleaning Tips / Maintenance: N/A

Adjustment Procedure: N/A

Replacement Procedure:

1. Clamp off and remove the Fuel Supply and Return Lines from the

Diesel-Burner Head, reference Figures 19 and 22.

2. Locate and disconnect the C-Plug Harness wires that connect to the

Flame Sensor and Fuel Solenoid, reference Figures 3, 15 and 18.

Also, disconnect the Ignition Cables from the Ignition Electrodes,

reference Figures 16 and 19.

3. Remove the four Nozzle Stand Plate Screws that secure the Nozzle

Stand Plate in place, reference Figure 19. Remove the Nozzle

Stand Plate by pulling on the Nozzle Stand until the plate releases

from the cast-aluminum Blower Casing, reference Figures 13 and

19.

4. Remove the four Ignition Coil Screws that secure the Ignition Coil

to the Protection Cap, reference Figure 13. Lift the Ignition Coil and

disconnect its Black (+) and Brown (-) wires from the C-Plug Har-

ness wires, prior to removing (reference Figures 3 and 24). Re-

move the Protection Cap from the Diesel-Burner so that the Motor

and Clutch Halves are exposed, reference Figures 12 and 14.

5. Remove the three Hex Head Screws that secure the Motor and

Motor Flange to the Blower Housing, reference Figure 13. Remove

the Motor and flange assembly along with the Clutch Halves,

reference Figures 13 and 14. Disconnect the Motor's Black (+) and

Brown (-) wires from the C-Plug Harness' wires, reference Figure

13.