96
NOTE
Use the top of the mechanical seal installation tool as a push tube to seat the sta-
tionary portion of mechanical seal in the bore of the pump head. PAC-EASE may be
used to lubricate the sides of the seat for easier installation.
Carefully push seat into bore of pump head until firmly seated. 4.
C. Install diaphragm.
Using alcohol swabs, clean pump shaft. 1.
Apply a generous coating of PAC-EASE rubber lubricant emulsion (or 2.
equivalent) to diaphragm.
Without touching mating face of seal ring, push diaphragm onto pump 3.
shaft.
Using mechanical seal installation tool, push on diaphragm until sealing 4.
faces are in full contact (seated against each other).
NOTES
If binding occurs, apply additional PAC-EASE lubricant and slide the spring and dia-
phragm onto the pump shaft. The seal ring must mate completely and evenly with the
stationary seat for the sealing faces to function properly.
If required, a small non-marring hammer may be used to tap on the mechanical seal
installation tool to fully and evenly seat the diaphragm on the pump shaft.
D. Install spring.
NOTE
It is easier to install the impeller key before installing the mechanical seal spring.
Keep shaft, diaphragm, and spring well lubricated with PAC-EASE. 1.
Place spring on pump shaft. 2.
Push spring onto diaphragm. 3.
E. Perform Impeller Installation portion of RSD Impeller R&R procedure. (See
paragraph 81.)
F. Perform Inducer Installation portion of RSD Inducer R&R procedure. (See
paragraph 5.8.4.5.)
G. Perform installation portion of RSD Volute R&R procedure. (See para-
graph 5.8.4.2 on page 69.)
H. Perform paragraph 4.4.4.1.3, Performance Testing Test Procedure, to verify
repair complete and pump in working condition.
NOTE
Repair any leaks or problems before returning apparatus to service.
I. Update all maintenance log entries.
J. Return apparatus to service.
5.8.4.11 AP/CBP/MBP Pump Head R&R
Water leaking from pump head is typically NOT an indication of a failed pump head. The pump
head openings are designed to allow water out when a mechanical seal is bypassing water. Simi-
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