The pump squeal means it is all of the way up, or has hit an obstruction.
Make sure that the safety bar is engaged when you make it to the squeal and then toggle the 3 way switch to the down position to get into the locked position. The locked position is necessary for use, and takes load off of the hydraulic pump.
It will only release 1-2" before stopping if all is correct.
When ready to bring down into travel, toggle the 3 way switch to raise only briefly, pull on the safety bar release cable, and then toggle to the down position. This is a flowing maneuver. Up, pull, down....that quick.
Check fluid level at the pump well in the down position
hth
steve
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2002 ford f350, 7.3 diesel
1985 hi-lo funchaser
kb0nai
kd7ctk
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