The owner's manual for this model does not discussion the ByPass Valve in much detail, only in moving the tractor when stalled. The attached photos show the left side ByPass Valve, which is the side which is not disengaging, in the Engaged and Disengaged positions.
Have a 2008 Hustler Model 928481and planning on changing the Hydrostatic Transmission fluid. Prior to starting the process, check to ensure the Bypass Valves to disengage the transmission are working allowing to bleed the system. Right side transmission will disengage, Left side remains in...