My HJ61 has the hydraulic clutch slave cylinder. There is no adjustment. If that is how your clutch is set up then I'd say there is a problem with either your hydraulics, the clutch, or a pressure plate that has no tension.
I would think that your hydraulics would be ok as the clutch is disengaging as soon as you touch the pedal, but just check to see if the slave cylinder pushrod is returning back into its resting position.
I would think that if you had no hydraulic pressure then the clutch wouldn't disengage until the pedal was near to the floor.
That leaves clutch plate and pressure plate. Pressure plates can, and do fail. Another thing to consider is if the pressure plate bolts were correctly torqued up (if the clutch had been worked on earlier). Then there's the question of oil on the clutch plate. Unfortunately most answers rely on physically looking at the clutch/pressure plate!