Raise the front wheels when greasing?

[RKL]

On the Freightliner chassis do you lift the front wheels off the ground when you grease the chassis or do you grease with wheels on the ground...I have been raising the wheels for years but wonder if you can grease with a pressure air grease gun just as well with wheels down....thanks....RKL

[FIRE UP]

RKL,
I too have been lifting wheel off the ground for greasing components in the front end suspension and steering systems. I've done experiments where I could not get grease into certain fittings while the wheels were loaded and, when they weren't, I could easily get grease into the fittings. Grease guns, whether air powered or manually powered, are pretty darn powerful but, sometimes, the weight, and certain conditions will prevail and you simply CANNOT get the grease into certain fittings without unloading the front end. That's my opinion anyway. I have no idea what Freightliner or any other chassis mfgr stipulates in their service protocol.
Scott