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Solenoid Operation
The solenoid is normally located on the bottom of a pneumatically operated pump for truck
applications.
In the non-activated state, the connection between the air tank and the pump is closed. When
activated, air flows from connection (P) of the solenoid to the pump, through opening (A). At the
end of the lubrication cycle, the solenoid valve returns to its original position closing the
connection between air tank (P) and pump (A). In this neutral position, the solenoid opens port
(A) to port (R) allowing air to flow from below to above the grease piston. Replenishing the
vacuum above the piston with air from below, held to a constant 5 psi via the air vent check
valve, prevents contaminants and moisture from entering the pump.
Before Sept 2019
After Sept 2019
Pressure Switch
A standard Lubecore automated lubrication system is equipped with a pressure
switch. Once the lubrication system has reached nominal operating pressure,
the pressure switch provides feedback to the timer. The pressure switch is, for a
pneumatically operated pump usually located in the front- center of the pump.
Pressure switches can also be located in manifold assemblies.
When a pressure alarm occurs, the operator is informed by an audible alarm
from the timer and when installed, a visual alarm. This visual alarm is usually a
green dash mounted LED identified by a Lubecore label.
Figure 2830
Lubecore air solenoid
Figure 2729
Air solenoid Schematic
Figure 2931
Pneumatic
pump pressure
switch location
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