Cat Lift Trucks (& Caterpillar) M40D:
Fault code A

I have a fault code of A displayed. The truck goes very slow with no hyd. If you turn the key off and then on, you get hyd. I checked the head cap. and found the neg. wire got hot and left scorch marks on the cap. What causes this? Any help? Thanks, Jim
  • Posted 2 Oct 2008 22:31
  • Discussion started by jim_v
  • Michigan, United States
Showing items 1 - 11 of 11 results.
to answer the question at hand
code A is:
Lift truck performance reduced. See Troubleshooting problem 5. Possible cause head capacitor failure.

and in the Problem 5 description it says:
Lift truck accelerates slower than normal with no lift.

- check the connections to the head capacitor and also the cables leading to the pos and neg heatsinks. Make sure they are tight and not corroded or burned. Check continuity.

check contiinuity on wire 34 to logics connector P2-2 , if good continuity then check head capacitor, if that is good then logics is bad.
  • Posted 29 Sep 2013 10:42
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
Hi did you fin out what code A was ??
  • Posted 29 Sep 2013 01:57
  • Reply by richard_m
  • lancashire, United Kingdom
I have no power to wire 34. Cap charges very fast. connections look good. no burnt parts. need trouble shooting guide. please help. Cat microcommand
  • Posted 21 Nov 2008 05:56
  • Reply by jim_v
  • Michigan, United States
sent email let me know if you got it
  • Posted 14 Nov 2008 10:41
  • Reply by truckparts123
  • New Hampshire, United States
please send info. check my profile for my email address. thank-you
  • Posted 13 Nov 2008 00:22
  • Reply by jim_v
  • Michigan, United States
I am sure adding the @ and sbcglobal.net will help...
  • Posted 11 Nov 2008 21:52
  • Reply by edward_t
  • South Carolina, United States
why won't it allow me to recieve?
  • Posted 11 Nov 2008 14:02
  • Modified 11 Nov 2008 14:03 by poster
  • Reply by jim_v
  • Michigan, United States
sorry. use jfr2006 @ sbcglobal.net. thanks, Jim
  • Posted 11 Nov 2008 13:56
  • Modified 11 Nov 2008 14:03 by poster
  • Reply by jim_v
  • Michigan, United States
when I put "jim_v" in my email program, it refuses to send to you...
I would think most folks put a reply address in their profile or somewhere if they want someone to be able to email them.
google gives me 864 choices for "jim_v" ,,,, which one should I use?

;-)
  • Posted 11 Nov 2008 09:10
  • Reply by edward_t
  • South Carolina, United States
please email me this. thanks, jim
  • Posted 11 Nov 2008 02:27
  • Reply by jim_v
  • Michigan, United States
E-mail me I will reply with code A troubleshooting. Email address in my profile
  • Posted 11 Oct 2008 07:46
  • Modified 11 Oct 2008 07:50 by poster
  • Reply by truckparts123
  • New Hampshire, United States

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