Motor and pump assembly, Assembly procedure - continued – Power Soak MX-220-HTS Owner's/Service Manual User Manual
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Motor and Pump Assembly
Assembly Procedure - Continued
10.
Install the mechanical seal on the shaft sleeve by hand. A twisting motion may be
needed to make it ride smoothly over the shoulders on the sleeve. Push it by hand until
it contacts the seat, make sure the spring and spring holder line up properly. *(see note)
11.
Install the snap ring using one hand to hold the snap ring pliers and the other hand to
compress the spring. When the spring pressure is released, the spring will push the
shaft sleeve outward, exposing the shaft sleeve o-ring to view temporarily.
12.
Install the impeller key, first twisting the shaft sleeve on the shaft until the keyways
line up.
13.
Install the shaft sleeve gasket.
14.
Place the impeller on the shaft engaging the key.
15.
Put the impeller screw gasket, impeller washer, and impeller washer gasket
together on the impeller screw as an assembly.
16.
Install the impeller screw subassemblies. With one hand, push the impeller back
against the mechanical seal spring and with the other hand turn the impeller screw in
hand tight.
17.
Check to see if the shaft sleeve has moved to its final position covering most of the
shaft sleeve o-ring.
18.
Tighten the impeller screw to 15 ft-lb. torque.
19.
Install the casing gasket on the shoulder of the adapter.
20.
Install the casing and tighten all the casing screws.
21.
Turn the motor shaft and check for any bindings or rubs caused by such things as
damaged or mis-aligned parts. Re-check all casing bolts for tightness. Tighten casing
bolts one at a time, turning the motor shaft, until rub disappears.
*NOTE
An optional procedure for assembly of the mechanical seal consists of mounting the
mechanical seal and the snap ring on the sleeve as a subassembly, which is then
placed in position on the motor shaft. Experienced pump mechanics may find that
this is more convenient as long as they recognize that this way introduces some
additional hazards of damaging or improper assembly of precision seal parts.