1.Open your pot of grease. There should be a plastic or metal disc with a hole in the centre, about 30mm across. If you haven't got a pot of grease like this, go and buy one. Castrol MS3 is a good choice for kingpins.
2. twist the handle on the bottom of the greasegun through 90 degrees, it will come away from the barrel and be held by a length of chain. Make sure the chain is hooked into one of the little slots to stop the piston coming out of the barrel in the next step.
3. Unscrew the top part of your greasegun, the bit with the nozzle and trigger on it. You are now holding the barrel with the piston in it.
4. Invert the barrel over the hole in the plate. Hold the barrel in one hand and the handle on the chain in the other.
Push firmly dwon on the barrel, pressing the circular plate down into the grease. This will force grease up through the hole into the barrel of the grease gun.
At the same time, pull smoothly on the handle , pulling the chain and the piston back up into the barrel, allowin the grease to fill the void without leaving air pockets.
5. When the piston is fully retracted, hook the chain into a slot again to stop the piston coming out and squirting the grease everywhere.
6. Replace the top
7. Release the chain to place the grease under compression
8. Undo the bleed valve at the rear of the gun to let any air out
9. Pump the trigger to get the grease flowing out of the nozzle. There's another bleed valve on the top that you can use to release air above the pump
10. Grease your kingpins with the chain loose, but ALWAYS make sure you pull the chain fully back and hook it into the slot when you finish. Otherwise the gun will burst its seals and leak while it's in storage.
