We don't lube ours I think the crane from 1994 had them replaced once. No visible negative effects... I could see tons of sawdust building up would sawdust filled lube be worse then no lube? I can't tell you
Really. Our 75' gets lithium spray once a month. Pain in the ars when we start using ropes on the ladder.
On our stick cranes in vt we used to use the spray lithium any chance we got. I always hated the dry boom hop!
No lubing on the KB, replace the pads as required. On the Nifty Lift, the pads would chatter after a while (factory lubed the boom), spray lithium is what I use. Telescope the boom out, squirt a light coat on, retract the boom, wipe off the excess.
Paraffin wax? An old bicycling trick was to dip your chain in melted paraffin wax. No petroleum lube for dust particles to attach, and your hands stayed clean when handling the chain. Graphite is a dry lubricant, but is messy. Don't know how you'd apply it on a crane.
The KBoom does require lube ,Palfinger uses a spray lube that goes on wet and than drys and does not rub off easily, it is expensive , i do it every 5 to 6 months . i would not go longer than that , one can will last for two applications .
I was told something similar to Steve, maybe that it was food grade grease (not oil) or something different about the grease, but I have no clue why they would use it vs the grease they use on the rest of the boom. All in all it's not a big deal, but from what I was told, my boom doesn't require greasing for the slides, but if you start you have to keep doing it. I would just assume to never start, one less thing to deal with.
My National 1300 has "no lube" sliders. I used to use Lube-a-boom on my earlier boom trucks, but don't use anything now. Something similar to this came up on an electric bike forum I'm on, guys wanting or thinking they needed to lube the (plastic) gears. Turns out it seemed to cause more problems, my attitude, on my bike or my crane, is if it's plastic, I don't lube it. One less thing to mess with is always good.