8240 link arms won’t go down

[Joe159632478]

I have a 8240 that the link arms will not lower on but they will lift if I let the oil out the rams and try them also it won’t calibrate

 

[agrimax]

Knobs on the EDC panel turned correctly and the switch to the rear of the gear levers in the down position?

 

[Joe159632478]

Knobs on the EDC panel turned correctly and the switch to the rear of the gear levers in the down position?

Yes all the knobs are correct and the switch is in the down position

 

[agrimax]

I would have thought it should throw a fault code but the lowering solenoid may have stuck or failed. You could swap them over to see. In front of the lift cross shaft,below the seat......
It's been a while since I had an 8240, but I'm nearly sure I had that problem too.Think oil seeped past an o-ring into the solenoid and stopped it working. Cleaned and new o-ring and ok again.

 

[Joe159632478]

I would have thought it should throw a fault code but the lowering solenoid may have stuck or failed. You could swap them over to see. In front of the lift cross shaft,below the seat......
It's been a while since I had an 8240, but I'm nearly sure I had that problem too.Think oil seeped past an o-ring into the solenoid and stopped it working. Cleaned and new o-ring and ok again.

Thank you will have a look at the o rings I did swap them over early to and seemed to pump
Up all the time For some reason maybe I was doing some thing wrong

 

[Joe159632478]

Still no luck any more ideas ??

 

[agrimax]

With the quadrant lever fully forward,did you try lowering with the fender buttons?
Failing that,it may be time to remove the control valve and see if there is something sticking internally,or a piece of debris stuck in an orifice..........
@forblue may be along soon......

 

[Joe159632478]

I have tried the fender buttons they won’t drop it either I have taken the valve off under the cab stripped a cleaned it and still no luck I also tryed putting power directly to the plugs but it will still only lift and won’t go down

 

[agrimax]

Don't know..........
Will they lower if you disconnect the assister rams completely? Another thought.......could the ASC lever be turned slightly to auxiliary position?

 

[Joe159632478]

Not that I am aware of I will check again if it was turned would it still lift but no lower ?

 

[agrimax]

If it was half turned,I'd think it would allow a certain amount of oil to still go to the control valve where the solenoids are.,hence still letting the arms lift.
It's just a thought though.........don't know if it would prevent lowering.........

 

[forblue]

asc valve will stop up and down...........

 

[ridger]

Pickup hitch rods stuck?

 

[ridger]

Had a linkage that looked like a small clothes hanger type wire come off my tm one time which stopped the arms moving, it moved some kind of thing which displayed the height of the arms in the cab