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1993 6V92 Alarmstat replacement

August 20, 2017, 03:03:25 pm

My Alarmstat is  broken, the electrical part is hanging by its wires, the brass sensor part is still in the block.    Note: If I connect the two wires together then the fans stop completely..  The part number is  1002 04880 - 185 degree.  Not sure how this works but my guess is by design fans are always on low and kick to high when the Alarmstat threshold is reached?  If this is the case - would I be better served/ what would be the detriment to replace this unit with a lower degree switch like a 170 or 175?  [Are my fans running on low or high all the time now since there is no actual sensor attached to the engine?]

Thank you  -Nick

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Re: 1993 6V92 Alarmstat replacement

Reply #1 – August 20, 2017, 03:07:36 pm

Ask Ken H. He has done a lot of fan work on his. You must have the horizontal radiator/dual fan model.

Pierce

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Re: 1993 6V92 Alarmstat replacement

Reply #2 – August 20, 2017, 04:20:02 pm

Here is a list of them with the part numbers for the different heat degrees. hat 185 is pricy!
KYSOR

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Re: 1993 6V92 Alarmstat replacement

Reply #3 – August 20, 2017, 05:52:01 pm

187 of them on ebay but finding the exact temp is tougher. Several 150 degree but the next up seems to be 195 degree. Some don't list the temp.  alarmstat | eBay  Might try calling some of the companies that have listings here.

Pierce

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Re: 1993 6V92 Alarmstat replacement

Reply #4 – August 20, 2017, 09:55:55 pm

Here is a list of the part numbers and their coresponding temperatures:
http://www.fanclutch.com/fan_clutch_controls.asp

Am I correct in thinking the fans are  on low until the the alarmstat kicks in? Therefore are my fans running on 'low' all the time since there is no temp to sense so to speak?  Kool [ no pun intended] to go with a lower temp Alarmstat? Thanks  -Nick

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Re: 1993 6V92 Alarmstat replacement

Reply #5 – August 20, 2017, 10:08:10 pm

OK, let's look at this.

In an ideal world, the fans would kick to high 5 degrees or so ABOVE thermostat full open temperature. Anything lower just means you are wasting fuel and HP to run the fans on high when the thermostat and fans on low could take care of your heat load.

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