Terex t200

[Rytwent]

Hi all. Got a 2004 terex t200 with 3200 hours on and every now and then when tilting or crowding the headstock the boom drops very harshly! It’s worse when your trying to do delicate work ie pick up or drop off a wobbly pallet and you just need to tilt or crowd the fork slightly it drops the boom and all delicate work is like trying to smash concrete! Not sure if it’s a possible fault with the joystick or something wrong with the valve block .ie bit of dirt in valve or valve rod sticking. Once got told there’s a valve underneath the inner boom to do with the headstock tilt and crowd. Any help or advice is much appreciated! Thanks