WARNING:
Lifting and handling heavy equipment poses a crush hazard. Use caution during lifting and
handling and wear appropriate Personal Protective Equipment (PPE, such as steel-toed shoes,
gloves, etc.) at all times. Seek assistance if necessary.
1.
Oil bearing seat on coupling end of shaft. Slide coupling end bearing (duplex, mounted back to-
back) on shaft as far as possible by hand. Place pipe or driving sleeve (such as the one shown in
6.1.5 Install the Ball Bearings on page 50
) over shaft, making sure it rests against inner race only.
Make sure bearing is "square" on shaft. Tap or press evenly until bearing is seated firmly against
the shaft shoulder. Do not mar the shaft, especially where it contacts oil seal. The duplex bearings
supplied by the factory as standard are manufactured by MRC. If equivalent bearings of other man-
ufacturer's are used, the arrangement will vary, The duplex bearing arrangement depends on the
type of construction used by the manufacturer. Refer to the manufacturer's instructions packed with
the bearings for duplex mounting arrangement.
2.
Insert the bearing lock washer, pressing tang into shaft keyway until it is firmly against the bearing.
3.
Oil shaft threads lightly and snug the bearing locknut against the lock washer. Tighten firmly with a
spanner wrench. Seat tang securely into slot in locknut with drift pin. If necessary, tighten locknut
slightly to match tang with slot. Do not loosen locknut to position.
Figure 62: Pump reassembly
4.
Slide bearing housing with O-ring in place, over impeller end of shaft and over outboard bearing.
5.
Tap outboard oil seal in place on bearing end cover (coupling end).
6.
Place bearing end cover and 0.152mm | 0.006" white manila gasket over coupling end of shaft and
fit into bearing housing. If oil seal is dry, oil lightly before sliding over shaft. Be sure to position
"TOP" (cast on cover) in line with "TOP" on housing. Bolt end cover firmly to housing.
7.
Oil inboard bearing seat on shaft. Slide inboard ball bearing on shaft as far as possible by hand.
Place pipe or sleeve (such as the one shown in
6.1.5 Install the Ball Bearings on page 50
over
shaft, making sure bearing is "square" on shaft. Tap or press sleeve evenly until bearing is seated
firmly against shaft shoulder. Do not mar shaft, especially where it contacts the oil seal or in stuffing
box area.
8.
Place a small amount of O-ring lubricant on inside of bearing frame at bearing housing and inboard
bearing seats, on O-ring, and on inboard oil seal. Slide shaft assembly into the bearing frame as far
as possible. When the bearing housing is properly installed (oil return hole at the bottom), the word
"TOP" located on the flange of the bearing housing will line up with the top of bearing frame. Be
sure bearing housing O-ring (1) is in place in groove on housing. Insert bearing housing bolts into
bearing housing and screw about 12.7mm | 1/2" into frame to hold shaft during further assembly.
6.7 Reassemble the Pump
3175 Installation, Operation and Maintenance Instructions
63
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