Cat Lift Trucks (& Caterpillar) ET4000:
Trouble code 57 no hydraulics

Cat. Model ET4000 Serial number is ETB1450508. Getting a code 57. There is no hyd operation so wondering if anyone can help out.

Thanks alot
Rob
  • Posted 30 May 2018 08:06
  • Discussion started by RMK1
  • Alberta, Canada
Showing items 1 - 2 of 2 results.
Having same code. Motor and pump were changed out due to stripped splines. After new motor,pump install code 57 when request hydraulics. Hydraulics motor briefly work then codes out. Confirmed motor to controller connections and power feed/ fuses. No melting or oddities. Assume controller has bricked but can't see it working before new motor and pump were installed.
  • Posted 26 Oct 2018 03:56
  • Reply by madtech1187
  • Virginia, United States
code 57 = Pump Motor Pulse Input Fault
result of fault is line contactor opened, pump contactor opened.

First off check all the fuses, check the controller connections.
Look for any burnt or melted areas around the U, V and W power cable connections.
Go to the pump motor and make sure it has not been contaminated by any battery acid spills from overcharging and battery overflow.
(i only mention this because i have ran into this before and since the pump motor is not protected very well acid spillover can get into the motor and destroy the sensor bearing causing failures).
  • Posted 23 Jun 2018 21:09
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com

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