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7)
Coat the 1/8 inch NPT plugs (if applicable) with a suitable pipe sealant, install into
the front housing and tighten.
Section (D)
External Mechanical Seal
Note: Mechanical seal must be removed first to provide access to the gland plate.
1)
Remove the mechanical seal (11) from the drive shaft by loosening the four set
screws.
Note: For the 312 and 314 refer to Steps 2 through 6 listed below under Double
2)
Remove the gland screws (16), lock washers (19) and gland (17).
3)
Remove the seal seat (25) and the two seal seat gaskets (18).
4)
Install new seal seat gaskets on the seal seat.
5)
Install gland, gland screws and lock washers.
6)
Install the mechanical seal with retaining clips onto the drive shaft being careful not
to damage the seal's wedge. Then remove the retaining clips. Slide the seal up to
the seal seat.
7)
Compress the mechanical seal by .09 inches (2.3 mm) and then tighten the four
setscrews.
Section (E)
Double Mechanical Seal
1)
To remove the mechanical seal (11) from the front housing, first remove the 1/8
inch NPT plug (9) and then loosen the four setscrews which are accessible through
the 1/8 inch NPT opening by rotating the pump shaft.
NOTE:
2)
Refer to paragraph (5) through (7) in the pump disassembly section.
3)
Remove the seal seat (inner) (26) and o-ring (25) from the front housing by
pressing it out.
The 312 and 314 have no gland plate.
Mechanical Seal and Step 8 in this Section.
For further seal removal the pump must be disassembled.
4)
Install a new o-ring on the seal seat (inner).
Seal Seat Inner
P. 9
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