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Old 06-03-2014, 03:28 PM   #16
bshanafelt
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City: Port Orchard, WA
Vessel Name: Isobel K
Vessel Model: 37' Custom Pilothouse
Join Date: Oct 2007
Posts: 426
Dave,

lots of ideas.

There is one actual fix.

This is simply a consequence of putting a high amp alternator on your motor.

The manual shows the belt routing you and many with similar year cummins B 5.9 motors utilize.

It is sufficient in the event you keep a stock 55A or mildly increased alternator.

The reverse rotation of the water pump is also apparently irrelevent.


When you and I and others who have added a high amp unit to our motor, we discover the additional force needed to spin the unit is greater than the poor wrap routing will allow, thus the slipping and eventual belt dust.


In my case, I added not only a high amp unit, but also a large frame one. Mine is rated at 200amp. Imagine the squeal, slippage and dust when the alternator went into a bulk mode.

I asked the question on other lists, as well as discussing with the Cummins tech who had supplied the part number for the large frame adaptor. He was dumfounded to discover the manual indicated a belt routing as it does.


Re route the belt. Get a new tensioner while you are at it.

Enjoy the full flex of your new high amp alt's. Just be sure and IR them while under load to make sure they don't get too hot since they are still small framers.

have fun
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