have three options for using this approach:
First, using a grease gun, you can supply lubricant
to a single metering valve mounted in a convenient location.
The valve in turn can supply up to 18 lubrication points.
Second, you can set up a master metering valve to supply
lubricant to several zoned valves, each capable of servicing
18 points. Third, the system becomes automatic when you add
the electric grease pump and timer to you master valve and
secondary valve arrangement.
A tractor equipped with a grease pump could
supply automated efficiency to numerous implements equipped
with centralized systems simply by setting the timer to meet
the needs of each unit.