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alternator "fail"

 
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dlm34077(at)gmail.com
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PostPosted: Mon Aug 05, 2019 9:34 am    Post subject: alternator "fail" Reply with quote

Just an update. After removing the cowls, found everything normal and bus voltage on the B+ output. I had already verified that bus voltage was making it through the field switch/breaker. I investigated with Hartzell an alternator inspection document. I considered that when I put the charger on the batteries, recharge was very quick. On a last thought without removing the existing alternator I put a voltmeter on the bus directly and started the engine, I immediately saw 14V+ on the bus. Problem solved. I am ordering a new sensor from GRT. BTW Vans still sells replacement parts but it is seems more difficult to find them on the website. Also found that starters are TBO equivalent to the engine and had no consensus on TBO for alternator.  

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Mauledriver(at)nc.rr.com
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PostPosted: Mon Aug 05, 2019 11:17 am    Post subject: alternator "fail" Reply with quote

On 8/5/2019 1:32 PM, dlm wrote:
Quote:
Just an update. After removing the cowls, found everything normal and
bus voltage on the B+ output. I had already verified that bus voltage
was making it through the field switch/breaker. I investigated with
Hartzell an alternator inspection document. I considered that when I
put the charger on the batteries, recharge was very quick. On a last
thought without removing the existing alternator I put a voltmeter on
the bus directly and started the engine, I immediately saw 14V+ on the
bus. Problem solved. I am ordering a new sensor from GRT. BTW Vans
still sells replacement parts but it is seems more difficult to find
them on the website. Also found that starters are TBO equivalent to
the engine and had no consensus on TBO for alternator.

Trying to understand what you determined the problem was; a GRT sensor? 
Is that in their EIS?

(I've been dealing with several charging and voltage level problems over
the years and have GRT EFIS, EIS, and 2 B&C Alts and Regs)
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