Crown FC-4000:
Hyd. Flow Adjustability

I have a fairly new Crown FC4000 forklift and would like to install a Cascade Carton Clamp. Is it possible for me to adjust the 4th Function flow rate down to Cascade's recommended flow rate of 8 gallons per minute max? If so, how do I go about doing that?
  • Posted 27 Jul 2005 07:21
  • Discussion started by gustaf
  • Indiana, United States
Showing items 1 - 5 of 5 results.
i assume you want to reduce the rate of flow thinking it will reduce clamping pressure and keep your operators from crushing your product? Am i correct in this assumption?
This is a common problem with clamps that are not installed correctly with the correct flow regulation.

Your best bet is to get with cascade and obtain a flow regulation device. They sell many different types, manually controlled and now electronically as well.

Simply adjusting the pressure/flow may gain you some control over this problem but it also may create other problems with other functions. Generally the 3rd and 4th functions are called auxillary functions and are both controlled by the same flow regulator, or possibly they MAY have individual flow controls but you still donot gain the desired result due to the mfg limitations or lack there of. And furthermore Slowing down the motor control does not cure this problem, it just makes the clamp operate slower. Motor control adjustments do not change the pressure, they just change the flow speed. You still will have the same clamping pressure. Changing the size of the hose even though it will gain you some relative drop in speed you still have the same clamping pressure overall but you also create the problem of possibly blowing a underrated hose if you drop the size of the hose too much.

I understand you want to come out of this as cheap as possible to save money but it has been my experience that you get what you pay for. If you cheap out on the job you will not be satisfied with its results in the end. Do it right the first time. Get the right pressure control hardware for the attachment.
  • Posted 9 Jul 2012 01:25
  • Reply by Jplayer
  • North Carolina, United States
John Player Jr
LiftOne, LLC
Charlotte, NC
just use your ev100 handset plugged into pump card
  • Posted 8 Jul 2012 17:52
  • Reply by crownie
  • Victoria, Australia
installing a smaller hydraulic hose will not hurt the does not affect press , it affects VOLUME...volume is what controls the speed of the clamp....PRESSURE controls the force that the open or closed clamp applys......been a hydraulic mechanic since 1982...Been a Crown tech for 17 years....yes , you will need to update the data plate to reflect the reduced capacity of the truck
  • Posted 6 Jul 2012 14:52
  • Reply by theforkliftdude
  • Wisconsin, United States
better get a hold of Crown New Breman and get a modification for the data tag to show the carton clamp with derated weight capacity. The flow can be adjusted by changing the orfice in the hydraulic control valve even with SCR lift. The flow should not need changed to add the Cascade attachment depending on what it is. i dont recommend changing the diameter of the hose this will increase pressure which could damage the pump or even cause injury to the operator if for some reason the hose would rupture and im sure Crown New Breman would definatley say no to this. I know this because I'm a road service tech for a Crown factory dealer
  • Posted 17 Feb 2008 14:12
  • Modified 17 Feb 2008 14:17 by poster
  • Reply by whoknows
  • Ohio, United States

Whare are you located? The dealer can probably answer your question on the phone for no charge. I see you are in Indiana, so I may be working for your servicing dealer. The short answer is if the hydrualics pump runs off a contactor, some sort of orfice or valve may need to be installed to reduce the flow. If it is SCR controlled hydraulics, yes the flow rate can be adjusted. A quick and dirty way is to plumb the clamp with 1/4 inch hose. That will reduce the flow a lot. Whatever the 1/4" hose won't pass will be dumped back to the tank through the releif valve.

Hope this helps.
  • Posted 29 Jul 2005 10:00
  • Reply by Liftdoctor
  • Indiana, United States

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