3:1 hauling ratchet illustration
I use it if it is really heavy or a lot of friction. I usually prefer Dr. Piton/Congo's 2:1 ratchet. My girlfriend use it more often because she's in the featherweight climbing class.
Set up the 1:1 system as usual.
First put up the holding ratchet with the haulrope, then unclip the carabiner on your harness with the haulline tale. If you use Petzl Pro Traxion, clip the carabiner into the lower hole to prevent the rachet from accidental opening.
Attach an upper jug connected to a locking biner and a pulley to the rope coming out of the holding ratchet.
Tread a static 7-8-9mm line through this pulley. Add a BFK on one end, and a jug on the other. (BFK to prevent the system coming apart)
Attach this lower jug on the line to the pig and the end with the BFK to your harness with an clove hitch so you can adjust it. Also put some weight on the lower jug so it slides down the rope unassisted.
Also attach a 7-8-9mm line to the upper jug. Clip a biner at the same height or higher than the holding ratchet and clip the line through this. This line is used to pull the upper jug up when you operate the system (instead of pushing it up with your hand).
To operate the system sit down to pull up the pig. When you stand up pull down on the line attached to the upper jug andpull down on the haulline coming out of the holding ratchet.
To pass a knot it is best to switch to an 2:1 system by modifying the 3:1 system with an extra pulley.
i) You attach the lower jug to the biner beside the holding rachet
(don't take the jug of...you'll switch back to 3:1 after the knot is dealt with)
ii) the upper jug is turned around and set under the knot on the haulline
iii) you add the second pulley (holding the cord between the first pulley and you harness) to the upper biner beside the holding ratchet.
Then you can get the knot passed in your holding ratchet.
This 3:1 system works fine when your lower jug can slide down the haulline unassisted. Also the system has the drawback of not getting the pig all the way up to the holding ratchet because it's mounted beneath it. It also have more rope in the system than the 2:1 so it isn't as effective as the 2:1.