Fairey winch adjustment

Evenin all, does anyone know how to adjust the clutch on the "pto box" at the back of my transfer box so when I get stronger wire I can uprate the pulling power of the winch? It's set at 1.4t for the electric board, but apparently can be set upto 14,000lbs. (or does anyone have a manual for it they can e-mail to me?) cheers.

on the manual, it says:

- set transfer box in neutral
- engage 1st gear
- engage power take off
- switch engine off
- (I will also set winch drum to free spool, tho not mentioned on manual)

- loosen M10 bolt at back of power take off unit
- loosen 5mm grub screw at the side of the ring
- insert 8mm rod into the available slot at the side of the ring
- turn clockwise to increase pulling torque, anti-clockwise to reduce pulling torque

- 80lbs torque on the ring = 8000lbs pull (+/- 15%)
- 75lbs torque on the ring = 7400lbs pull (+/- 15%)
- 60lbs torque on the ring = 6000lbs pull (+/- 15%)