Class 6030 CP lowering slowly

[Renaultman]

As per title. Normally she is really quick, up and down but it is really slow at the moment and hardly works at all in float or when auto boom suspension kicks in, it's slightly better in standard but still not right.
Anyone had similar and solved it, am guessing at check valve or maybe even levelling but have a niggling doubt it could be electrical.
TIA Tony

 

[lexion780tt]

Hi is it just the up and down that is slow every thing else working fine.

It it is it will be either the up and down slice in the valve block or more likely the hose burst valve on the lift ram

 

[Renaultman]

Hi is it just the up and down that is slow every thing else working fine.

It it is it will be either the up and down slice in the valve block or more likely the hose burst valve on the lift ram

Cheers yes everything thing else is spot on, even lift is as fast as ever. It's just the lower that's a pita I think you are probably right in saying it's the hose burst valve.

 

[Andy26]

Does your Scorpion have the safety overload cutout, I had the same symptoms you describe and it was the overload cutout.

Iirc, I had to adjust the gap between the sensor and plate near the boom pivot and adjust the sensor on the boom extension.

 

[Renaultman]

Does your Scorpion have the safety overload cutout, I had the same symptoms you describe and it was the overload cutout.

Iirc, I had to adjust the gap between the sensor and plate near the boom pivot and adjust the sensor on the boom extension.

Andy I'll have a look if you get chance, and you don't mind, it would be great if you could grab me a picture or two. If you still have it please

 

[Andy26]

Andy I'll have a look if you get chance, and you don't mind, it would be great if you could grab me a picture or two. If you still have it please

Yes no problem, the overload safety thing is fitted from late 2011 onwards. The rear sensor and plate are hidden behind the panels at the rear of the boom, the front one is a plate and sensor attached to the front of the boom.

 

[Renaultman]

Mine's 2011 so could be either I thought it might be behind that plate. Again thank you for your help.

 

[Andy26]

Mine's 2011 so could be either I thought it might be behind that plate. Again thank you for your help.

Look at the front of the main boom there will be a zinc covered plate and sensor.

 

[Andy26]

@Renaultman you will also have a rocker switch in the cab with a picture of a bucket and pallet tines.

If yours is an earlier machine, then as above I suspect it'd be the check valve or my first port of call the solenoid operating the lower function.

 

[Renaultman]

Had the plate off this afternoon, there is a roller/rocker switch that works the boom suspension that wasn't moving freely I have got that moving and now it lowers in any position but still not fast enough. If it was the solenoid would it go down at all? Like you am still thinking check valve. Mine has a rocker with a bucket pic, for the locking pins. The auto level for forks, man basket is on a key. Again many thanks.

 

[lexion780tt]

With the boom in the switch dosnt work most people wire tied them up to bypass load restriction only stops the lift system not the lower.

If you were to do it in a safe manner and use a ram stop you can take hose burst valve off off and plum ram in without it to try it.

 

[Renaultman]

With the boom in the switch dosnt work most people wire tied them up to bypass load restriction only stops the lift system not the lower.

If you were to do it in a safe manner and use a ram stop you can take hose burst valve off off and plum ram in without it to try it.

Thanks. Good Idea. I bet it's an expensive bit to replace if unnecessary.

 

[Andy26]

With the boom in the switch dosnt work most people wire tied them up to bypass load restriction only stops the lift system not the lower.

If you were to do it in a safe manner and use a ram stop you can take hose burst valve off off and plum ram in without it to try it.

On the rear of the boom there is a profile cut arc that the sensor detects, when this goes out of range the system knows the boom is at full height, when the boom is also extended then in this upper region of travel the boom drop rate is slowed right down.

Cable tieing the front sensor wheel that detects if the boom is extended would trick the system into thinking that the boom is retracted and so prevent the safety cutout system from operating.

 

[Renaultman]

On the rear of the boom there is a profile cut arc that the sensor detects, when this goes out of range the system knows the boom is at full height, when the boom is also extended then in this upper region of travel the boom drop rate is slowed right down.

Cable tieing the front sensor wheel that detects if the boom is extended would trick the system into thinking that the boom is retracted and so prevent the safety cutout system from operating.

More to play with. Thanks.

 

[Renaultman]

So I've taken some pictures, what's the betting mine is a Mish mash between the two variations, story of my life,

 

[lexion780tt]

The button on top right with padlock will over ride safe load

As yours is a cp the switch is at back of boom behind cover.

If it's not safe load it will be a hydraulic fault cos joystick is hydraulic for up down and crowd