AIRMATIC pump failure cause
09-08-2015, 08:17 PM
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2009 S550 AMG sport pckg. 2014 Ford F-150 Lariat Supercrewcab
AIRMATIC pump failure cause
Hey everyone,
I haven't been on in a while and was bored the other day in my garage and saw my old failed airmatic pump sitting in there.... so obviously I decided to take it apart and see the inside guts of it
It turns out it is a typical brush motor (Really ****ing heavy duty) that spins a piston in a bore. Now the design flaw to the pump is that the bore is not sealed off from the motor. As the brushes wear, the dust collects everywhere in the pump including in the bore and it essentially seizes the pump. That explains why people keep blowing a fuse. The only solution would be a brushless motor. So theyre kinda engineered to fail. A brushless motor would be a logical solution or find a way to seal the bore off from the motor.
I haven't been on in a while and was bored the other day in my garage and saw my old failed airmatic pump sitting in there.... so obviously I decided to take it apart and see the inside guts of it
It turns out it is a typical brush motor (Really ****ing heavy duty) that spins a piston in a bore. Now the design flaw to the pump is that the bore is not sealed off from the motor. As the brushes wear, the dust collects everywhere in the pump including in the bore and it essentially seizes the pump. That explains why people keep blowing a fuse. The only solution would be a brushless motor. So theyre kinda engineered to fail. A brushless motor would be a logical solution or find a way to seal the bore off from the motor.
09-09-2015, 08:46 AM
#2
Actually the brushes being mostly graphite sticks provide lubrication to the piston ring and extend its life.... The pumps fail mostly because of thermal issues which is what accelerates the piston ring and cylinder wall wear.
09-10-2015, 11:52 AM
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True some graphite would help but it was caked beyond all belief. I should've taken a pic. It was just clogged in the bore and all over the motor. The pump probably does thousands of revs a day to correct the pressureS and those brushes wear quickly
09-11-2015, 01:17 PM
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The pump runs often if there is a leak in the Airmatic system.
Perhaps the pump was caked because of the air drier becoming full of water and allowing moisture enter the pump. This is sort of a design issue, the drier can be serviced but this is not part of the official maintenance.
Can you show us a brushless DC motor at that power without a gear drive to run directly the compressor? Should be big and expensive.
Perhaps the pump was caked because of the air drier becoming full of water and allowing moisture enter the pump. This is sort of a design issue, the drier can be serviced but this is not part of the official maintenance.
Can you show us a brushless DC motor at that power without a gear drive to run directly the compressor? Should be big and expensive.
