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The top gears are just 90 deg bevel gears. The lower Zerk fitting lubes the bronze nut and worm shaft. The Nut is secured in the top of the extending leg. Lube the Zerk when the landing gear is all the way up to the top and it is supposed to lube the worm gear when it is extended. I use bearing grease in the Zerk. I also have a Zerk in the top so I do not have to remove the cap to lube the bevel gears.
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2011 2955RL Gen-Y Executive Kingpin
2022 GMC 2500HD Duramax/Alison
4X4 Crew Cab/Standard bed.
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