Originally Posted by Lloydg
I don't understand why EZ lube recommends you do it the way I did and others such as yourself speak of problems getting into brake problems.
Speaking only from my own experience, I only remove/repack every 3 years and use the EZ-Lube Zerk fittings for lubrication before every trip.
The biggest mistakes I see people who complain about the system stem more from misunderstanding about the system, service technician incompetence (both in using the system and normal bearing repack and brake inspection), and Zerk fitting failures (almost in that order).
If used as directed in the EZ-Lube manual (NEVER use compressed air grease guns is a warning) the system will continually flush out dirty partially cooked grease from the bearings regularly and you will always have fresh grease for every trip.
When removing the hub for brake inspections or bearing packing, a careless mechanic can scratch/tear the just installed or inspected rear grease lip seal on the axle threads when replacing the hub. This seal damage will defeat the EZ-Lube system by allowing even the low pressure grease from a hand pumped gun to escape the rear lip seal into the brake area.
Zerk fittings are by their nature subject to failure from dirt, heat, and the tiny spring behind the ball. If, when using a hand held grease gun, the Zerk will not "take grease," it must be removed and flushed to make sure it is not broken. If broken, it needs to be replaced and they are CHEAP. I always carry a few spares.
Using a "ZERK BLASTER" or similar device to "blast" grease into a plugged Zerk can cause dirt to be pushed into the axle core at the least and can overpressure the system failing the rear lip seal.