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Old 12-18-2018, 01:43 PM   #1
Patrick of M
2005 T1N 2500 (NA spec)
 
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Default Successful removal of Espar turbine fan!

The turbine fan on the Espar is quite delicate and the first time I tried to remove one off the center shaft I broke a piece of it. Yesterday I had a little time to investigate a non op Espar I have for parts, when the fan motor would not operate no matter what I did, it was time to remove it.
Below is a pic of how I did this. I started by shinning a 500 watt halogen work light on it until it was very hot, almost too hot to touch. Once I got two blades in across both sides, it was just a matter of driving more blades between the first set, I kept going until a satisfying “pop” then had to keep going again until another pop.
Once I had the fan off the shaft it was a simple matter to remove the motor.
I opened up the casing by unbending the the tabs , once the ends of the motor are loose , you can lift off the top section, unclip and slide the brush and stator assembly down and out of the casing.
My investigation showed that the brush wires had corroded and dissolved....so that is it for now, although should it necessary I could replace the bush wires and get this going again.
It is an expensive fan and motor so if anyone has the time, it is repairable.
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Last edited by Patrick of M; 12-18-2018 at 01:52 PM.
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Old 12-18-2018, 03:05 PM   #2
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Default Re: Successful removal of Espar turbine fan!

I had similar experience to yours. Take note that the clearance between the wheel and fan housing is very critical. I suggest measuring before removal, and using a couple of spacers, stacks of paper, etc to maintain the clearance during reinstallation.
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Old 12-18-2018, 03:39 PM   #3
rollerbearing
 
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Default Re: Successful removal of Espar turbine fan!

Brilliant idea to keep stacking those blades in there.

In addition to Midwestdifter's caution about the gap - those removing the combustion air turbine or the blower turbine on an AIRTRONIC should put match marks on BOTH turbines. The turbines are mass balanced together.

I'm not sure how to put match marks on the armature easily, but they are presumably well balanced at the motor factory.
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Old 01-01-2019, 06:11 PM   #4
Nautamaran
2004 140” SHC U.S. T1N
 
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Default Re: Successful removal of Espar turbine fan!

Perhaps a sharp bit of tungsten could reach down into the hole and scratch an index mark onto the shaft end?
(since taking up welding again I’ve found all sorts of uses for TIG consumables! )

-dave
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Old 09-24-2019, 01:38 AM   #5
Patrick of M
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Default Re: Successful removal of Espar turbine fan!

Put together a Espar motor and fan today and it was dead easy.
For starters the fans I have removed were very close tolerance to the housing, thinner than a piece of regular paper, and my feeler gages are rusty so I tossed them, suffice to say the turbine pretty much touches the housing. I was concerned that during reassembly I might overdrive the turbine down onto the shaft.
Well I don’t know how that turbine hole does it but I popped the turbine, gave it a smack with a bit of wood and light hammer and it went home exactly were it needed to be, almost touching, could not fit a paper in there.
Other notes:
Either some ecu are pinned out differently or I am an idiot.
This fan motor came from a different unit, the harness releases and installs leads easily (make sure they are clocked correctly)
But even though I had taken care to duplicate the wire/colour/ position, my turbine was running backwards (smoke coming out of the intake hose).
I opened the unit in situ (to avoid clamping off the coolant hoses again) flipped the wires and it worked. I am very sure I got the wires correctly, but I was copying the original install...or I’m an idiot...
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Last edited by Patrick of M; 09-24-2019 at 01:47 AM.
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