My grandfather rehabs lawn equipment, and one thing he has always done is to drill and install zerks on the mower deck spindles when they weren't installed...I have an old Jacobsen GT14, and it has drilled spindles.
The other thing to consider, when talking lubrication, is the QUALITY of the grease. I run one of three greases, and only one as of lately...Mobile 1, Pennzoil 707L, and Schaeffers. I have seen almost no failures running these three greases. Point being: don't buy junk grease.