Repair/Replace Low Pressure Pump Assembly. (FIGURES 2-6 and 2-7)

TM 55-1905-223-24-7

2-15.

Repair/Replace Low Pressure Pump Assembly. (FIGURES 2-6 and 2-7)

This task covers: a. Removal,

b. Repair,

c. Replacement.

INITIAL SETUP:

Tools

Equipment Condition

Tool kit, general mechanic's,

RO desalinator shut down. Refer

to TM 55-1905-223-10.

RO desalinator tagged "Out of Service,

Materials/Parts

Do Not Operate."

Nonmetallic hose P/N PVTBF075

Low pressure pump assembly P/N BC-4C-MD

Preformed packing P/N 135-023-10

Alternating current motor P/N 145-035-10

Teflon tape, Item 1, Appendix C

Warning tag, Item 11, Appendix C

REMOVAL

a. Close appropriate inlet feedwater gate valve (2, FIGURE 2-5, Sheet 1) for watermaker unit under maintenance.

b. Loosen hose clamp (3, FIGURE 2-6) and disconnect nonmetallic hose (2) from sediment strainer assembly.

c. Loosen hose (8) and disconnect pump outlet nonmetallic hose (9) from pump housing (10).

d. On magnetic starter assembly (FIGURE 2-7), support the assembly, and remove two machine screws (3) securing

magnetic starter assembly to main frame cross member.

e. Remove four machine screws (1) securing access door (2) and remove access door (2).

f. Tag and disconnect electrical leads at (4) low pressure pump, water quality monitor switch, power input from

auxiliary machinery MCC, and high pressure pump conduit box.

g. Disassemble power cord strain relief (5) from low pressure pump motor power cord (6).

h. Pull low pressure pump motor power cord (6) from magnetic starte r assembly.

i. Remove magnetic starter assembly.

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