Cat Lift Trucks (& Caterpillar) DP40:
alternator

Have a DP40 with some sort of relay next to the glow plug timer on the left side front firewall. The alternator has three wires, one goes to the battery, one to the indicator light & the other to this relay. Four wires in a plug going to this relay & we are unable to get this
as they are only sending a five wire solid state relay. Any ideas?
Thanks
  • Posted 27 Mar 2015 00:32
  • Discussion started by buckshot
  • Texas, United States
Showing items 1 - 3 of 3 results.
There are a couple different versions of this truck that changed during the years. There are a couple DP40 models that show up and a couple of DPL40 models... i've looked through all of them.

The best i can tell from the wiring diagram for the diesel model is this 'relay' as you put it does get a positive signal from the same circuit as the battery positive circuit on the alternator which comes from the battery positive off the battery, the diagram shows it tied into that circuit. The diagram is calling this the engine stop control timer. It looks to have a 4 wire connection also.
The way the diagram shows it there is a 3 wire connector and then a single wire connector all connecting to this device.
Would that sound like what you are dealing with?

the part number for this part is 16A1111001
  • Posted 30 Mar 2015 03:17
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
3CN90046
THE ALTERNATOR HAS THREE WIRES. 24V. ONE WIRE GOES TO THE BATTERY,ONE TO AN INDICATOR LIGHT & THE OTHER TO THIS RELAY.
THE RELAY LOOKS LIKE A SMALLER VERSION OF OLD STYLE EXTERNAL VOLTAGE REGULATORS ON AUTOS.
THANKS
  • Posted 27 Mar 2015 01:49
  • Reply by buckshot
  • Texas, United States
Full serial number off dataplate?
  • Posted 27 Mar 2015 01:36
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com

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