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davidbrady · (This post was last modified: 07-13-2013 09:35 by davidbrady.)

Morey,

Three years ago I bought a hydraulic reservoir thermo sensor with alarm from Holland Motors Michigan. I gave them BB part number: 0012070.

If Holland is no longer helpful we can get it from Index Sensors. I attached their catalog and as best I can tell it would be part number 8036201 on page 16. The thread is 1/2" NPT. The temperature setpoints on mine are 160 deg F to turn on the fans and 200 deg F to illuminate the LED on the dashboard. Testing of this device is a little different than your usual Alarmstat. Page 170-5 of the 2003 LTC-40 Service Manual explains the procedure.

We have diagrams of our Hayden components including the fans here in our Document Library.

.pdf

Index Sensors.pdf (Size: 1.48 MB / Downloads: 5358)

(07-12-2013 22:55)cmillsap Wrote: The Haden fans (2) attached to the Hayden radiator on my LXi are controlled through a control circuit from the ECM through a 160*F N.O. single probe aquastat located on the bottom of the hydraulic oil reservoir.

Hi Chuck,

I'm not aware of any Detroit Diesel ECM output that would control the Hayden fan circuitry. It could very well be that this is the case on the 2000. I know that on my 2002 there's no ECM involvement. This might be another step in the upgrade.