PH-20/PHX-20 Manual
44
Metering Pump Line
WARNING! Before performing any maintenance, make sure the Main Power
Switch is OFF and incoming power is locked OFF. Allow material temperature
to cool below 80F and bleed all material pressure to zero.
Weekly: When the Proportioning Pumps are functioning properly it is
not unusual to a small amount of Poly (R) material to appear on the
Pump Shaft. This material should be wiped away so dirt does no
accumulate on the Pump Shaft and the Pump Shaft Packings are not
damaged.
Yearly or as required: It is not unusually for those who use the PH Series Proportioner on
a regular basis to rebuild the Proportioning Pumps on a yearly basis and service the
Hydraulic Drive System (page 41) at the same time, when the Proportioner is out of service.
Pump Seal Replacement
Refer to Parts Identification Drawing (pages 54 (PHX) (56PH) for reference.
NOTE!
When Iso (A) Proportioning Pump Cylinder is disassembled for service, all parts
included in the Seal Kit (KT-PAX or KT-PA) should be replaced.
When the Poly (R) Proportioning Pump Cylinder is disassembled for service, all parts
included in the Seal Kit (KT-PAX or KT-PA) should be replaced.
When assembling Proportioning Pump lubricate all Seals, Piston Rod and Pump
Cylinder with #1 Lithium Grease to assist in assembly and minimize Seal damage
during re-assembly.
CAUTION! Use wooden or plastic tools or a brass brush for cleaning. Do not
use metal or abrasive tools that can scratch the contact surfaces.
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