Make sure you vent the thing after filling & store it properly. Directions below stolen from a TR4 Forum
pull out the black handle & lock it, unscrew the grease reservoir from the head. stuff the reservoir with grease...can release the black handle to expel the old grease & help suck in your new grease. Reassemble, release black handle. Pump the gun with bleed valves open, once grease runs clean close the valves....pump grease thru to the tip...thats it. Take the pressure off the grease in storage by pulling & locking the black handle.
