MTH M50 SERIES - Reassembly (P30)

1. Stand a piece of 3/4” pipe,
with the threads cut off, on a
workbench or similar fl at surface,
with the bearing placed on the
correct shaft end.
2. Insert the shaft into the pipe so
the bearing is between the pipe
Figure 4-25
Figure 4-25
Figure 4-26
Figure 4-26
Page 523
*Also refer to Alternate bearing
installation procedures.
2. Place the pedestal, pump
mounting surface up, in a vise
or suitable fi xture and insert the
bearing assembly. It should
be possible to install the shaft
assembly with fi rm thumb
pressure. Refer to Figure 4-26.
If more force is required, the
butt end of a hammer handle or
plastic mallet may be helpful.
The shaft assembly should never
be forced or driven in.
P3 & P30 BEARING
3
24A
33A
23
101
24
110
30
17
39
110A
110A
38
3
33B
31
31
33D
33C
33C
33C
33A
Figure 4-28 P30 Bearing Pedestal
and the shoulder of the shaft.
Refer to Figure 4-27.
3. Using extreme caution, gently
tap on the end of the shaft until
the bearing rests against the
shoulder. Never attempt to install
the bearings by striking the outer
race.
4. Repeat steps 1-3 for the
other bearing.
4F Reassembly (P30)
All parts should be visually inspected
and cleaned or replaced as outlined
in 4D above. It is recommended that
the bearings be replaced any time
the bearing pedestal is disassembled
for service.
KEY NO.
NAME / DESCRIPTION
Quantity
P-3
P-30
3
Bearing Pedestal
Bearing Pedestal
1
1
4
Snap Ring / Bearing Retaining
Snap Ring / Bearing Retaining
1
0
17
Shaft
1
1
21
Flinger
Flinger
1
0
23
Key
Key
1
1
24
BallBearing / Inboard
BallBearing / Inboard
1
1
24A
Ball Bearing / Outboard
Ball Bearing / Outboard
1
1
30
Coupling Guard
Coupling Guard
2
2
31
Bearing Frame Mounting Bracket
Bearing Frame Mounting Bracket
0
2
33
Capscrew
Capscrew
4
0
33A
Capscrew
Capscrew
0
2
33B
Hex Capscrew
Hex Capscrew
0
4
33C
Shoulder Screw
0
2
33D
Thru Bolt - Shaft
0
1
38
Bearing Locknut
Bearing Locknut
0
1
39
Bearing Lockwasher
Bearing Lockwasher
0
1
101
End Bell
0
1
110
Bearing Adjusting Nut - Inboard
Bearing Adjusting Nut - Inboard
0
1
110A
Bearing Adjusting Nut - Outboard
Bearing Adjusting Nut - Outboard
0
1
Figure 4-27
3. Install the Snap Ring (#4) in the
pump end of the pedestal. Be
sure the snap ring is seated
properly in the groove. The
beveled edge of the ring should
face away from the bearing.
4. Install the Flinger (#21) over the
snap ring. The bearing pedestal
is now ready for pump and motor
installation.
*Alternate bearing installation
procedures.
If an arbor press is not available,
the bearings may be installed on the
shaft using the following procedure:
This procedure is not recommended
and should only be used in an
emergency situation.