Lister Clippers: How do I lubricate the gear?

After every 100 hours use, remove the screws in the head, clipper head itself and the gearbox cover. (image 1) and wipe away hair and used grease from the gear wheel. Check the wheel for wear and broken teeth, then re-coat the gear with clean grease, using Lister R2 or equivalent (Image 1.2) Refit the clipper head and gearbox cover before operating.