Cat Lift Trucks (& Caterpillar) 2EC30:
Code 33

Unit starts up, line contactor kicks in and kicks out right away, can't find code 33 any were in service manual, any ideas anybody, thanks.
  • Posted 22 Apr 2016 03:37
  • Discussion started by All Lift Tech
  • California, United States
Showing items 1 - 5 of 5 results.
Found transistors shorted, replaced, now I have code 60 with pump contactor kicking in as soon as key is turn on...go figure....thanks for the info!
  • Posted 26 Apr 2016 03:32
  • Reply by All Lift Tech
  • California, United States
code 33 is actually a mix of 2 other problems
also the service manual is kinda strange in this one because of the way they list the problem codes v/s the display codes, it can be confusing.
Anyway the manual lists it as problem #24 Display '33'

display shows 33, action light ! illuminates, no lift truck operation: line contactor closes and opens.

possible causes: failure in pump circuit

in the checks it refers to problem 22 and 23 (display '31' and '32')

so we go to problems 22 and 23.

possible causes listed for problem 22 (display31) code are:
Faulty wire connections: D4P, or T1P and T2P failed, failed pump driver board or failed logics.

possible causes listed for problem 23 (display 32) code are:
Faulty wire connections: D4P, or T1P and T2P failed, failed pump driver board or failed logics.

both have same possible causes.

- look for ANY burned connectors, connections or wires
- loose connections
- smashed or compressed connectors, corrosion or foreign material
- Also check:
Wire #45 from emitter of transistor T1P and T2P to P4-7 and P2-10
Wire #34 from pump driver board to pos heatsink
Wire #1 from pump driver board to neg heatsink
Wire #119 from pump shunt (+) to P2-18
Wire #29 from pump shunt (-) to P2-19

repair any defects and reconnect wires

of course you want to test diodes:
D4P
check transistors:
T1P and T2P
check pump driver board
check head capacitor also

replace any that fail checks

if all components pass tests the replace logics
  • Posted 23 Apr 2016 09:58
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
A2EC363282
  • Posted 23 Apr 2016 00:28
  • Reply by All Lift Tech
  • California, United States
A2EC363282
  • Posted 23 Apr 2016 00:27
  • Reply by All Lift Tech
  • California, United States
we need a full serial number
  • Posted 22 Apr 2016 07:52
  • Reply by edward_t
  • South Carolina, United States
"it's not rocket surgery"

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