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 manufactured by the DeLaval Steam Turbine Company. The
(1)
Replacement of main contacts. Procedure for
pump has a capacity of 175 gpm at 35 psi. The prime mover
replacement and adjustment of main contacts is the same as
of the pump is a 10-hp, 1750-rpm, 115-volt dc, electric motor.
that given in d (2) above. Two sets of main contacts are
installed on the line contactor.
b. Purpose. The pump is installed against the forward
(2)
Coil replacement (d (3) above).
bulkhead of the engine room and can perform the following
(3)
Replacement of tail spring as follows:
functions:
(a)
Unhook tail spring from armature and
(1)
Discharge contents of dirty lubricating oil tank
adjusting screw, and remove. Installation is in reverse order
into a container.
of removal.
(2)
Transfer oil from the lubricating oil storage tank
(b)
Set tail spring tension with adjusting nut
to propulsion engine crankcase.
so that with panel removed from enclosure and inclined 450
(3)
Remove lubricating oil from the engine sump,
backward, the armature will return to its open position when
and send it through Purifier and back to the engine sump.
closed manually and released quickly.
c. Operation. The operation of the pump is as follows:
(4)
Replacement and adjustment of Auxiliary
Fluid enters the suction inlet, divides, and flows to the ends of
contacts as follows:
the rotors. At rotor ends it enters the rotor screw forms and is
(a)
Remove panel from enclosure (c (2)
propelled to the central discharge chamber. The rotors are in
above).
hydraulic balance. Packing is subject to suction pressure
(b)
Remove cotter pin (3, fig. 5-84) and slide
only. A piping connection is made between pump discharge
off contact holder assembly (7). Remove spring (8) and
and the pump side of the packing. Fluid is delivered through
stationary contact (2). Replace in reverse order of removal.
this pipe from discharge side of pump to the pump side of
(c)
Remove nuts (1) and remove movable
packing, thereby sealing air leaks.
contact (9). Replace in reverse order of removal.
d. Maintenance.
(d)
Adjust "Lead Dimension" (L.D.) to
(1)
Inspect all piping connections for leaks. Tighten
between 3/32 and 1/8 inch by loosening mounting nuts (6)
leaking connections.
and moving post (4) forward or backward.
(2)
Check for signs of air leakage at packing gland.
(5)
Replacement of line Contactor. See d (5) above.
If leakage is detected, tighten gland enough to stop leakage.
f. Emergency Stop Station.
(1)
Remove cover screws and lift off cover,
NOTE
disconnect electrical connections, loosen cable clamp and
Leakage at the gland will be indicated by
withdraw cable, remove mounting screws and lift switch
the sound of air being drawn into the
assembly from mounting.
pump.
(2)
Installation is the reverse order of removal
e. Removal.
5-45. Lubricating Oil Standby Pump
(1)
Disconnect suction and discharge pump to
a. General. The lubricating oil standby pump is a model A
piping coupling flange (fig. 5-85) by removing six bolts in
322AX250 rotor type pump
each flange.
5-113
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