I know this isn't VW related but there are some good mechanically minded people on here.

I'm working on a 50's era toyota bus with an old holden 6 cylinder engine (from Kingswood) in it.

The clutch doesn't fully engage when you press down on it. Where do I adjust this? I can see that the clutch rod has an adjustment thing on it (and I have adjusted this as far as I can), but that doesn't seem to be the answer.

I notice that the rod goes into a hydrolic cylinder. Might the problem be air bubbles in the pipeline fluid? And if so, where do I bleed the line at?

Is anybody familiar with these clutch systems?

Thanks anyone!

There should be a bleed nipple on the clutch cylinder on the side of the bell housing or gear box.
Rob.....

I am guessing you mean the "clutch" is not fully disengaging!
There could be three adjustments:
1 Adjustment of the position of the height of the pedal.
2 Adjustment of the "pedal" rod for height and more important "freeplay" at the pedal.
Without knowing this measurement leave at lease 20mm at the pedal - this will then leave the master cylinder cup not covering the return hole.
3 Adjustment of the "rod" in the slave cylinder to give "freeplay" at the pedal and/or the operating fork. Without knowing this measurement leave at lease 5mm at the rod

Then do your bleeding at the slave cylinder.

Thanks guys, the bus will be on the road tomorrow. Your help was helpful and appreciated.