Re: Aqua Hot Bearings/ Black smoke
Reply #1 –
Art,
To check bearing and the motor you will need to open the burner case which is not too hard to do.
Remove burner as you have before. Remove the four screws that hold the black burner case in place. Using a mallet, tap the coil and the air intake gently to start the case slipping down the housing. Once it is loose, remove the coil and slip the case off the housing. Disconnect the two wires to the coil paying attention to the wire color of each connection.
Remove the three bolts that holds the motor to the housing marking the top of the motor and the top of the housing. Disconnect the two wires to the motor paying attention to the wire color of each connection. Now that the motor is off, you can use the clutch to spin the blower and fuel pump. If there is much drag, it is probably the bearings but the fuel pump is also on the same shaft.
If it is the bearings, use the online shop manual to remove the blower housing. With the blower and bearings removed from the fuel pump spin the blower and check for no drag. If you find drag, disassemble the blower shaft. Replace with new bearings and reassemble.
If bearings are okay, you can spin the motor shaft by using the clutch. It should spin freely but you will feel the magnets in the motor. If the motor concerns you, reassemble the motor to the housing. You can use an optical tach with a marking strip on the clutch to verify 4500 plus rpm.
Most of the time it is the bearings followed by the motor. Less than two hours to R&R either one and a check control box sure helps diagnosing the problem.
Roger Berke is a great source for parts and additional info.
Hope this help you.
Topic: Aqua Hot Bearings/ Black smoke