Hello everyone i have a 1999 gradall 534D-6 and im having a problem with movement power. When the machine is cold it will move but is lacking power, once it warms up the movement is restricted even more and the front tires start locking up while trying to move. Once its locked up if you jabb the brake petal a few times it will free the brakes up and start moving again but not for long an it locks up again. Some of the things ive already checked is the 4x4 solenoid /spool valve the tilt fork solenoid/spool valve. I also did some speed tests an im only getting around 10mph on blacktop. Also there is Plenty of lifting power it will lift a 4000k load of lumber to the second floor with no issues. Any suggestions or help is greatly appreciated. Getting very frustrated :Banghead
Gradall hydraulic help!!
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