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mikeyboy_85
Samba Member
Joined: March 08, 2004
Posts: 59
Location: Victoria Australia
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 Posted: Fri Apr 03, 2015 3:21 am Post subject: Replacement of Combustion Air blower in heater |
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Hello there, the bearings in my combustion air blower have turned bad in my heater, is it possible to replace it with one from another heater? i looked at it and it appears that the wiring is hard wired? or is there a clip in attachment in the wiring somewhere? it appears that way in the manual but i cant seem to see it??
Cheers Michael |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Fri Apr 03, 2015 7:56 am Post subject: |
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No......its not just a motor....its a timing unit for the fuel pump and the coil. You can take one from another unit but its not just a generic motor.
The combustion blower has a four or five pin plug that plugs into the side of it To connect the harness.
The blower comes apart rather easily. If memory serves....the blower has bronze bearings. It may have ball bearings.....been a while.
But.....remove the blower from the heater unit. The harness unplugs. It may or may not have a threaded connection for the harness....but it comes right off. There is a cap/cover over the turbine With an o-ring around the outside. Remove that cover.
The turbine impellor has a set screw that holds it to the shaft. Before you remove the impellor. ...measure how high/far it is from the edge of the housing so you can put it back in the corr3ct position.
remove the rubber boot from the other end. Remove the large "E" clip. Spray some pentrating oil on the body if the motor is hard to remove.....but it should slide out.
You will see that there is a screwed on cap on each end. Under those caps is a pair of contact points on each end....both are geared to the shaft. One pair of points fires the coil....one fires the fuel pump. The screws to disassemble the motor are under the caps on each end.
Most probably you can free up the motor by getting visual access to the bearings and cleaning them with contact cleaner. ...then lube them with a high temp electric motor grease after cleaning them out and freeing them up. DO NOT USE ANY LUBE WITH GRAPHITE OR MOLY. Both of those materials are conductors and will short out the motor quickly. Ray |
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