You are much better off to pack the wheel bearing by hand, then to use the Zerk fitting. If you check the "forum" you will find a lot of problems from over greasing the bearings. Grease is not like motor oil that it is used as you drive. My F250 recommends 60K intervals for greasing front bearings. Or about 5 years. I did them at 58K and they were in perfect condition. I have seen some vehicles go 100K before greasing. Om my 5th I try to do the bearing about every 12K, more to inspect brakes then worry about bearings.