I don't use any grease on my kingpin and never have and don't see any abnormal wear. That sort of the defeats the use of a disk.
I do lubricate the springs and slide mechanism on my Hijacker hitch for the ease of unhooking.
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Lenny and Ros
2012 Montana 3400RL,680 Watts Solar,4xT-105 Trojans,GP-ISW2000-12 Inverter,Trimetric 2020, EMSHW50C
2009 Chevy Silverado 3500 LTZ Duramax 4x4 CC Dually, Banks Speed Brake
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