Discussion:
Combi will not drive.

The combi will change in all directions but will not drive. Checked the proper fuses and all are good. changed the parking brake button still wont drive. Tested the brake valve at the rear wheel and front right wheel and they are working. Checked the plc board and it points to the 4 port diverter valve, dont think its getting power. any ideas
  • Posted 14 Jun 2025 01:32
  • By Nic_Olson
  • joined 16 May'25 - 5 messages
  • Ontario, Canada
Showing items 1 - 3 of 3 results.
Hi Nic,
First I would check for internal leaks in each hydraulic motor (port L). Usually we should have leaks of approx. 0.5 liters/min.
If everything is OK, I would check the output from the PLC for the forward solenoid and the reverse solenoid, plug X3.1 (pin 1+2 white color, positiv for forward solenoid) and (pin 3+4 brown color, positiv for revers solenoid). The PLC board may be faulty.
Anyway, the guys at Combilift will help you, they're pretty pro.
  • Posted 16 Jun 2025 21:01
  • By Cristian_Virgil
  • joined 20 Mar'20 - 4 messages
  • Romania
cristian.ilinca@wylze.ro
Hi Nic
Not sure of the specific issue and or age of your truck, but Combilift have a dedicated Technical Team covering North America. If you still need support, you can complete a quick technical support form at the bottom of the main combilift.com web site or direct link https://warranty.combilift.net/technical-support-form/. The form only asks for the minimal info so the team can quickly help you. There is no login required and no charge for this support.

The North America Team will be back to you quickly. Hope you get sorted quickly.
  • Posted 16 Jun 2025 17:42
  • By Richard_Irwin
  • joined 20 Feb'20 - 80 messages
  • Monaghan, Ireland
hi there are many things that can stop the unit driving but if you have directional change working just a question make sure brake light is operating on the dash when you put handbrake on i have had trouble with the switch under the inching pedal which also activates the brake just a thought richard from combilift will help you when he sees the post
rule of thumb dont over think the problem some times its easier than you think
  • Posted 15 Jun 2025 17:43
  • By skyreach
  • joined 2 Apr'22 - 40 messages
  • Victoria, Australia
reach for the sky

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