Trouble Shooting - Modular Lube Systems
DESCRIPTION
In a Lincoln Modular Lube lubrication system, lubricant from the pump flows through the metering
devices and to the lubrication points serviced by the system. If any component of this system
does not freely accept and discharge its portion of the lubricant, a blockage has occurred.
This blockage will result in higher than normal pressure to be developed by the lubricant pump.
Depending on the application or system design, this blockage can cause a complete loss of
lubricant flow through the entire system, and no lube point will receive lubricant.
A blockage is indicated by higher than normal system pressure developed by the pump as it
attempts to deliver lubricant. The higher pressure resulting from a blockage can be indicated
through the use of performance indicators, or other devices such as pressure switches,
incorporated into the system design.
Divider Valves
A Modular Lube divider valve is a proportioning device consisting of an inlet and end section, and
a minimum of three working divider valve sections. A master divider valve is the first divider valve
downstream from the lubricant pump, and usually proportions lubricant to a series of secondary
divider valves.
Divider valves contain a piston specially fitted to that section, built in outlet check valves, and
various passageways that direct and meter the flow of lubricant.
Divider valves are manufactured with either one (single) or two (twin) lube outlets. Stampings on
the face of each section indicate the series of divider valve (UV, MC, MM), the lubricant volume
discharged per piston stroke expressed in thousandths of cubic inches (35 = .035 in
3
), and the
number of lube outlets required (S = single, one outlet only; T = twin, two lube outlets required).
Caution: Never block a lubricant outlet port that is designed to discharge lubricant.
PERFORMANCE INDICATORS
Lincoln performance indicators are pressure-sensitive devices that pinpoint excessive pressure in
series progressive lubrication systems. These devices, which are installed in the alternate outlet
ports of divider valves, signal a fault either by causing an indicator pin to protrude or by releasing
lubricant to the atmosphere.
It is recommended that some type of performance indicator be used to monitor every working
outlet of a Modular Lube System.
Reset Type Performance Indicators
Reset indicators stop lube system operation when a fault occurs. These devices can be used in
either master or secondary divider valves. When a lube line becomes blocked, the resulting high
pressure extends the indicator pin.
The high pressure prevents the affected divider valve piston from completing its cycle, causing
pressure to backup through the divider valve. The indicator pin remains extended until it is reset
manually. This helps locate the lube line that is blocked.
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