PMC MN-06001, Manual

Page: 38 / 66

PMCA-20
Manual
38
Pump Base Service
To service Discharge/Inlet Ball
1. CLOSE appropriate Proportioner Inlet Material Supply Valve and remove the Air
Line from the Transfer Pump.
2. Ensure all material pressure in the Proportioner system is zero and remove top
screw plug from the top of the pump base.
3. Discharge Ball:
a. Remove Discharge Ball with a Magnet, clean Ball and Ball Seat, and inspect for
foreign material and flat spot(s) on Ball.
b. Using supplied Ball Seat Tool (TL-02), to check for proper Ball Seat/Ball Seat
Gasket compression, remove the cage. Snug Seat up to¼ turn maximum .
NOTE! It is recommended to replace the O-Ring anytime the cage is removed.
4. Inlet Ball:
a. Perform step 1 & 2 from above.
b. Remove Cage and Spring.
c. Remove Inlet Ball with a Magnet, clean Ball and Ball Seat, and inspect for
foreign material and flat spot(s) on Ball.
d. Using supplied Ball Seat Tool (TL-02), check for proper Ball Seat/Ball Seat
Gasket compression. Snug Seat up to ¼ turn maximum .
Pump Seal Replacement
Refer to Parts Identification Drawings for reference.
NOTE!

When Iso
“A” Proportioning Pump Cylinder is disassembled for service, all parts
included in the Seal Kit (KT-05001-60 or KT-05001-40) should be replaced.

When the Poly
“R” Proportioning Pump Cylinder is disassembled for service, all parts
included in the Seal Kit (KT-05002-60 or KT-05002-40) 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.

When the Pump Line End Block is disassembled for service, all O-rings included in the
O-ring Kit (KT-05009) should be replaced.

After reassembly of the Proportioning Pumps torque the Assembly Bolts to 30 ft-lbs
(40 N-m).
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.