News service and business centre for materials handlingHOME
DISCUSSION FORUMS : Forkliftaction.communicate
I have a Cat Model:NR4500P S/N:8NR3641703 36volt with code
Code33:KS closed
Mod 6

Lost mast lift up function first now no functions work at all. Pump that's not even kick on.
Anyone have any info on what the code means

Appreciate the help Thanks
  • Posted 30 Aug 2019 09:41 PM
Total replies: 16. Showing items 1 - 16 of 16 results.
  • swoop223
  • North Carolina, United States
according to the service book Alarm 33 Mod 6 describes it as:
The safety contact did not operate when the slave controlled it. It was stuck in the open position.
Mod 6 is the EPS (steering) control system
check the sensors on the steering gear, there should be 3 of them and they can be checked with a vom, they have orange indicator lights on them but still disconnect them and check with the meter. Make sure they are adjusted correctly.

You've been swooped!
  • Posted 30 Aug 2019 11:43 PM
Appreciated will check on the items listed
  • Posted 31 Aug 2019 01:57 AM
What are the specs for checking the sensors? Also there were no lights on ,on the sensors
  • Posted 3 Sep 2019 07:45 AM
  • • Modified 3 Sep 2019 07:50 AM by poster
  • swoop223
  • North Carolina, United States
with the lift powered on you can put something metallic (magnetic) in front of the face of the sensor and there is an led light on the top that should light up when it closes. Thats the easiest way to test one.
I'll have to look through the service book and see if there is info on how to test it another way.

You've been swooped!
  • Posted 3 Sep 2019 02:34 PM
Ok I tested the sensors and led came on all three sensors 32 33 34. When I did it on 33 the alarm beeping stopped on the sicos menu then code 54 pop up.

Is there anyway to attach a picture to the forum page?
  • Posted 3 Sep 2019 10:19 PM
I have a zapi handset but not familiar on how to use it
  • Posted 3 Sep 2019 10:20 PM
  • swoop223
  • North Carolina, United States
Not without running it by forum admins first.
if you like you can send it to my email address, its listed in my profile and also shows in my signature on every post i make.

It's good they work, the code changed because you activated a sensor out of an expected sequence most likely. I'll check on that new code and see what it means and get back to you as soon as i can.

You've been swooped!
  • Posted 3 Sep 2019 11:52 PM
I just sent you a email
  • Posted 4 Sep 2019 02:23 AM
Is there a procedure on checking the steering wheel
  • Posted 5 Sep 2019 09:23 PM
ANY BREAKS IN THE OVERMAST CABLE and you lose all lift and aux functions. Usual break is at base inside reach where cable comes out. But with no reach, its difficult to access that area. Cat and Jungheinrich are same problem. You may need another lift to raise carriage or unhook reach hoses to extend. Poor system
  • Posted 8 Sep 2019 09:26 PM
Easi Tek thank you will check on this next week
  • Posted 8 Sep 2019 09:29 PM
the over mast cable you stated is inside the mast?

Also have you ever had any issues with the realays? Cat is calling them K1 & K2 Part no: RL188826
  • Posted 12 Sep 2019 05:09 AM
  • swoop223
  • North Carolina, United States
the 'over the mast' cable he speaks of isn't actually a "cable". CAT's genius engineers came up with the bright idea of making a twinline hose assembly with the wire tube made into the hose so basically you have 2 hoses like a twinline hose with a hollow tube in the center of the hoses, all made into one assembly. And the catch to that is the wires running through this tube are loose wires you have to pull through the tube assy and then install the connector ends on after you get it pulled and installed on the mast. I guess running a separate cable was too easy for them so they decided to add a challenge to the mast hydraulic/electric hose concept. And to top that off the route they run the hose with the hose brackets just add's to the challenge when reinstalling the hose assy.
It's not an easy job by any means.
As for the K1 and K2 relays? K1 and K2 reference the contactors, are you meaning the K11 and K12 relays?, from what i remember i never had any issues with those myself.

You've been swooped!
  • Posted 12 Sep 2019 07:59 AM
Would that issue with the cable give us Code 33 as well? Going to try to check on the connector ends sometime today
  • Posted 12 Sep 2019 10:50 PM
  • swoop223
  • North Carolina, United States
probably not, the sensors or contact related to the error is in the steering unit sensors or their associated wiring most likely, not out on the mast. But since the auxillary functions on the mast do work off of the auxillary pump circuit which also operates steering it may.
Checking that wire harness in the mast isn't that hard, just raise the carriage up and extend the reach out to get access to the plug at the base of the carriage frame, then find the other end of the plug on the outside of the left side of the mast and check the continuity of each wire. They are color coded so it would be hard to mix up the wires. if one of the wires is broken it will have more resistance than the others. If you wiggle the harness/hose assy around while connected you will probably see alot of variation in readings. Or possibly might see it open up completely.

You've been swooped!
  • Posted 13 Sep 2019 07:26 AM
  • • Modified 13 Sep 2019 07:32 AM by poster
LOL, Swoop has definitely done one of those jobs! Yes, it doesnt make sense how complicated it is to change over mast wires on a Cat, Juhngheinrich, and now Unicarrier. Need a fish to pull wires through.
  • Posted 16 Sep 2019 10:31 AM
Total replies: 16. Showing items 1 - 16 of 16 results.

Having trouble using the Discussion Forums? Contact us for help! accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.


Forkliftaction Media Pty Ltd
PO Box 1439
Milton QLD 4064
About Forkliftaction
The Forkliftaction Team
Privacy Policy
Site Map
Business Directory
Discussion Forums
Industry News
Events Calendar
Jobs & Resumes
Photo Galleries
Blog articles
Our Bloggers

Industry Brands
Company Index
Regions & Countries

Advertise on Forkliftaction
Editorial Features / Calendar
Featured Businesses
Past News Editions
Industry Associations
Storing your login information automatically.

When you select the 'Remember me' option, your login information will be stored on your computer in the form of a cookie. When you visit again, the stored login information will be retrieved automatically and you will not have to submit your login parameters (email address and password) each time you want to visit our members-only pages.

A cookie is a small piece of data that is sent to your browser from a web server and stored on your computer's hard drive. A cookie can't read data off your hard disk or read cookie files created by other sites. Cookies do not damage your system.