Lincoln Centro-Matic P653S, Manual

Page: 9 / 48

Page Number - 9
Form 404372
Electric Operated Centro-Matic Pump P653S
Description of Operation
Fig. 3 Disassembled pump housing - view from the bottom
1 - Venting element 2 - Integrated pressure switch
3 - Motor 4 - Pump elements with intergrated
lubrication lines
Fig. 4 Idle run of the switch joint on the venting element
1 - Inactive venting element
6 - Switch joint
7 - Cam (driven clockwise by the motor)
Pump Operation
Drive
• The pump housing consists of the following components:
gear motor, final gear drive, three pumping elements
connected together by internal passages and vent valve.
Pump can be configured with internal pressure switch or
transducer.
• The gear motor shaft is connected to the final stage gear
drive. The final gear has incorporated eccentric and cam
to drive the pumping elements and to control the internal
vent valve (Fig. 4).
• Vent valve is a two way normally closed spring biased
valve.
• Pressure switch is not adjustable and preset to 3,500 psig
(240 bar).
• Pressure transducer is adjustable. Factory setting is 3,500
psig (240 bar). Pressure setting of the pressure trans-
ducer can be adjusted from 1,400 to 4,600 psig (96 to 317
bar) in 100 psig (6.9 bar) increments.
Lube Cycle/Pressurization
• The motor turns the cam (7) clockwise to start lubrica-
tion cycle. As soon as pump starts to operate, the display
rotating segment is turning clockwise also (Fig. 20).
Maximum time to build the preset pressure is 12 minutes.
If pump does not build preset pressure, fault signal E1 or
E2 will appear on the display.
• Vent valve (1) is normally closed and stays closed during
lubrication cycle, preventing lubricant flow back to the
reservoir (see Fig. 4).
• The output of three pump elements (4) (Fig. 3) is com-
bined by internal passages.
• The eccentric drives the pump elements to pump the lubri-
cant from the reservoir and build the line pressure.
• The cam (7) will keep the vent valve (1) closed.
• Supply line can be connected to any one of the pump ele-
ment outlets. The remaining two pump elements outlets
should be plugged.
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