Tip & How-To about Heating & Cooling

How to oil a motor when there is no place to oil it.

For the last several years manufacters of small motors have been making and installing these 'oiless motors' in window units and residential central air conditioners, both in the inside furnace and the outside condensing unit.

The idea behind all this - is that they are 'oiless.' Hmph!

By being able to 'oil' motors we can extend the life of a motor - so doesn't it make sense to make them where they can be 'oiled.'

Yes - unless your business depends on "Selling Motors." Get the idea?

Anyway - if you have one of these 'oiless' motors that is 'froze up will not run, or squeals/sqeaks real loud when running (if it is running) - you are in a world of hurt because the 'fix' as any good Service Tech (working for most companies including himself will tell you) ... the 'fix' is to buy a New Motor.

And.... he/she would be right ... partially.

I agree that when a motor freezes up and will not run, and it's hard to even turn the shaft manually - (or when it's beginning to 'squeal and squeak real loud) - well - I do agree that it (motor) is probably 'done for.'

However ... there is a little trick that I've done that does have a chance (better than 50-50) of working - and will extend the life of the motor - sometimes for years!

That is to take one of these oiless motors that is giving you trouble and by using a drill - 'drill a 'small hole' into the "top" of the casing of the bearing.

You can find the 'bearing casing' by looking at the spot where the motor shaft first comes out of the motor (on double shafted motors there will be one on each side). The bearing is like a 'ring on your finger' - it rides on the shaft of the motor and is encased in a metal casing. This 'casing' is where you want to drill the hole.

Be sure the hole is very small (and on top) - just big enough to get the plastic spout of a small bottle of machine oil into the hole - which is the way you will be able to 'oil' the bearing once you've drilled the hole.' You don't have to worry about how much oil (necessarily) you squirt in the hole either - for if the bearing is already dry and causing trouble - 'the more the better' is usually the rule.

Note: be sure to do this on both bearings of a 'double-shafted' motor.

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No power


see this step: God bless you
check.gif Check the house circuit breaker to see if it tripped?
Click here if you own a Vacuflo Central Vacuum Unit continuously trips your circuit breaker
If it is tripped, then turn off your central vacuum unit and reset the circuit breaker. Then turn the central vacuum unit on. If the circuit breaker trips again, then refer to the following:
check.gifDetermine if the house circuit your vacuum unit is on has sufficient voltage required.
check.gifIf your unit has a reset button, press the button and try again.
check.gifCross the low voltage wire from the relay at the unit with a small screw driver. If you hear the relay click you need to replace your motor.
Click here to view Central Vacuum Motors
Click here to view How to replace a motor
If you do not hear a click, then you need to replace your relay.

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My compressor runs way too long to fill up to 150 PSI. It fills up quick to 120 PSI then just takes forever to get to 150 but finally does. It's only 1 year old with very little use. 17 gal, 1.1 horse, 150 max psi.


The pressure switch should be at the factory setting of about 120# max. Not to be hurtful,but what you discribe is normal. Even a 2 HP 220V is minimum for a compressor.. You go by the CFM Rating. You and I can not afford a two thousand dollar 12 CFM Unit. Your compressor is simply too small, to do much. It is pushing against tank pressure so much,after 90# that the reed valves can't hold it. Set it at 100 to 120. It is not designed to run up to 150 max. Now if it is,an oiless compressor , it won't last long. My Campbell- Hausfeld lasted 31 years. Got a new one two years ago

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