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EXTERNAL BALANCED SEALS - SETTING THE DRIVE COLLAR BY POSITION
1.
Assemble the spring, seal cup, o-ring seal and carbon seal onto the drive collar. Care must
be taken so that the spring does not rest on the tab that is bent back. A portion of the spring
is offset to provide clearance for this tab. Care must also be taken to ensure that the pin on
the drive collar is in line with the slot on the cup.
2.
Install as a unit on the shaft.
3.
Install the backplate and casing.
4.
Install and tighten the casing clamp.
5.
Slide the drive collar and seal assembly toward the backplate until the nose of the drive collar
pushes the o-ring and carbon seal tight against the backplate.
6.
Slide the drive collar away from the backplate
1
/
32
" and secure the drive collar in this location
with the setscrews.
When the drive collar is properly positioned and seal components are properly installed, the
pump shaft should rotate freely by hand. If excessive effort is required to rotate the shaft,
check to be sure that all components are properly installed and that the drive collar is properly
positioned.
M A I N T E N A N C E