Crown PE4500-60:
will bearly move but all 3 leads wires going to motor r very hot

I have 2 legs of 24v coming form the battery going to access 3. out of access 3 to the motor, I am showing 9-12v on each leg going to motor when its engaged, forward or reverse, the wheel barely moves and motor leads get super hot. what should the voltage be going to each leg? and do I need to go back and look at the POT on the throttle controls? this is my first time working on a powered hand truck. thanks
  • Posted 10 Oct 2015 05:39
  • Modified 10 Oct 2015 05:46 by poster
  • Discussion started by bradley_c
  • Florida, United States
Showing items 1 - 6 of 6 results.
Just ran into this one and it was a broken wire from the harness that goes to the drive motor. The Access module can't "see" what the drive motor is doing...hence the lift barely able to get out of it's own way. Many times the harness goes under the power cables and through months/years of turning left and right they wear down and brake and it's NO picnic trying to solve this problem.
  • Posted 1 Aug 2016 07:41
  • Reply by jeffrey_r
  • Pennsylvania, United States
Sorry not been on here for a couple of days. yes that would more than likely be it the only way. Of checking it if it's a crown controller would be through the dash, service mode, diagnostics, access3, inputs, then ecr1 and look to see if the counts go up as them motor drives. What drive motor is fitted?? If it's anything like the European trucks the crown drive motors have an external encoder, the earlier trucks have an internal encoder which is part of the bearing. It is a fairly common fault we have over 400 trucks on site mainly crown, jungheinrich and Still and we change quite a few each year and nearly all show the exact fault yours is showing, but on the crowns for some reason they don't always bring up an error code
  • Posted 16 Oct 2015 05:31
  • Reply by lifter01
  • West Yorkshire, United Kingdom
ok I think I have found it, it is on the M1the harness is on the top of the motor. and is the encoder were all 3 leads connect to the motor?
If so is there anyway of checking it?
  • Posted 13 Oct 2015 01:23
  • Reply by bradley_c
  • Florida, United States
Were would I find this in the book, is it a part in the controls up top in the handle or is it a part of the access #3 I cant find it in the book, thanks
  • Posted 13 Oct 2015 00:05
  • Reply by bradley_c
  • Florida, United States
Sounds like a bad encoder on the drive motor
  • Posted 10 Oct 2015 06:00
  • Reply by lifter01
  • West Yorkshire, United Kingdom
Sorry I don't know how the other post got posted but can someone remove them?
  • Posted 10 Oct 2015 05:50
  • Reply by bradley_c
  • Florida, United States

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