Discussion:
Fields and armatures

Additionally w/ respect to fields and armatures, the resistance between the comutator and shaft on a yale drive motor is 35k ohms. The yale p/n is 730004900, 36 volt, is this within tolerance?
  • Posted 16 Mar 2011 19:25
  • By 7777
  • joined 8 Mar'11 - 649 messages
  • New York, United States
Showing items 1 - 5 of 5 results.
The motor was completely pressure washed w/ extra attention to the armature. The reading at that point (after drying) was 35k ohm. Following your advice of using alittle cleaner, the resistance jumped to infinity.
Thank you
  • Posted 17 Mar 2011 21:30
  • By 7777
  • joined 8 Mar'11 - 649 messages
  • New York, United States
Will do, thank you
  • Posted 17 Mar 2011 18:06
  • By 7777
  • joined 8 Mar'11 - 649 messages
  • New York, United States
The reading should be more than 100k ohms. Your's is less at 35k. You could try taking some spray electric motor cleaner and washing it to see if the resistance increases to above 100k ohms.
  • Posted 17 Mar 2011 09:32
  • By mrfixit
  • joined 11 Dec'08 - 1,434 messages
  • New York, United States
I'm checking the commutator to the shaft ( disassembled motor), what should that resistance read at a minimum. If I check between pwr cables (on an assembled motor), I'm reading through the field, right? Do you know who sells recond. armatures?
  • Posted 17 Mar 2011 06:31
  • By 7777
  • joined 8 Mar'11 - 649 messages
  • New York, United States
it is bad, if your reading is accurate.
if this truck uses a GE controller, min. resistance is 100K ohms between any power cable (the commutator is attached and should be almost 0 ohms) and the frame (the shaft bearings are attached to and almost 0 ohms)
  • Posted 16 Mar 2011 21:08
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"

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Fact of the week
The use of "hello" as a telephone greeting is attributed to Thomas Edison. He is said to have suggested it as a simpler alternative to other greetings, such as "Do I get you?" or "Are you there?".