I have an older clark that the mast drops while under a load. The bigger the load the quicker it drops. mostly when the load is in the second and third stage. The hydrolic fluid is full and there are no noticable leaks. Is there a bleeder screw that I can try and where is it or do I possibly have something more going on here?
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You can bleed to the cows come home and it'll still drop. sometimes the inner tubes are pitted and rusty, this causes premature packing ware and the load drops. check the tubes when you take it apart.
The boom was rebuilt about 7 years ago. The lift is used often but not constent, maybe a couple of hours a day total. I am leaning toward that myself. I thought I would try bleeding the system before having the cylnders rebuilt but dont know where a bleeder screw is.
Sounds like you need to get the lift cylinders resealed.
possible inner leaks in lifting cilinders or should check main valve unit.
Regards
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