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 (5)
Remove all packing from gland in back head (5).
g.
Installation.
(1)
Position pump on foundation and check
f. Assembly.
alignment of coupling flanges.
(1)
Replace thrust bearing on shaft.
(2)
Install pump mounting bolts and again check
(2)
Position new inner bearing seal (11) in pump
alignment of coupling flanges. Flanges must meet squarely.
frame, and slide impeller shaft into position.
(3)
Replace coupling bolts and tighten.
(4)
Reconnect suction and discharge lines.
NOTE
When positioning shaft be careful not to
5-40. Motor
damage bearing seal.
a. General. The motor is a 7.5-hp, 1750-rpm, 115-volt
dc motor, flanged directly to the fresh and salt water standby
(3)
Slide inner bearing (10) into position on shaft
pumps. Ball bearings at each end of motor support the
and into pump frame.
armature and shaft.
(4)
Replace bearing lockwasher and bearing locknut
b. Maintenance.
The maintenance procedures for
(17).
replacing bearings, brush holders, coils, insulators, plug
(5)
Replace bearing cover (16) and tighten
springs and washers is the same as for the motor covered in
capscrews which hold cover in place.
(6)
Replace liquid deflector (9). Tighten setscrew in
deflector and check bearings by revolving shaft to see if shaft
5-41. Controllers
revolves freely.
(7)
Slide packing gland onto shaft against liquid
a. General. The fresh and salt water standby pump
deflector.
controller is a dc magnetic type with current limit acceleration.
(8)
Position back head (5) and impeller (19). Make
The contacts and springs on the controller are replaceable.
sure key (21) is properly seated in keyway and in impeller.
b. Maintenance. For maintenance of controllers see
(9)
Replace impeller screw; tighten and replace
impeller screw key.
(10) Replace pump casing (2) and capscrews (4).
5-42. Fuel Oil Transfer Pump
(11) Check pump by rotating shaft. Be sure pump
a. General. The fuel oil transfer pump is a DeLaval IMO
does not bind and impeller does not rub against casing side.
rotary displacement type pump direct-coupled to a 1750-rpm,
(12) Replace packing (7) by positioning two rings of
1-hp, 115-volt dc motor. The motor is controlled by dc
packing, seal cage (6), and then three rings of packing.
magnetic type controller operated from a START-STOP
switch located in the door of the controller, and an emergency
NOTE
STOP button located at the head of the engine room access
In replacing packing, stagger the butts of
ladder.
b. Maintenance and Adjustment.
packing rings so leakage will not occur
(1)
Inspect piping connections for leaks. Tighten
through butts.
leaking connections.
2)
Check for leakage at pump venthole (18, fig. 5-
(13) Slide packing gland into position and tighten
gland nuts evenly while rotating pump by hand. Do not
check mechanical seal.
overtighten as this may score the shaft.
5-104
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