slow going gradall telehandler

I have a 2001 Gradall 534c6 telehandler with a pile of hours but does the job around the farm so really not interested in upgrading for 15hrs of use each season. I have a couple problems currently. 1st problem is the speed which is about 3 mph tops going forward, reverse just a bit better but not much. Yes, I have the left side inching peddle all the way back. I have the traction control peddle back also. 4x4 switch is also off on dash. Hydraulic fluid is 2/3 up on site glass so is fine....

slow going gradall telehandler

slow going gradall telehandler