Met-Pro Fybroc 5500 series, Installation Manual, Page: 8 / 18

7
maintenance
1) Periodically lubricate the upper ball bearing(s)
when equipped with grease fittings.
2) Check for noise (mechanical or hydraulic) and
vibration.
3) Check float switch operation
4) Check flush line to the line shaft bearings for
buildup.
5) Check discharge pressure gauge periodically.
disassembly - Vertical 5500 series
1) Shut off motor. Shut off all valves controlling
flow of liquid from the pump. Disconnect the
power to the motor.
2) Disconnect discharge pipe and flush piping.
3) Unbolt motor and remove from motor support.
4) Remove the pump unit from the pit unless the
pit can be drained and the pump can be
worked on from the pit.
5) When the pump is lying in the horizontal
position, the pump column and shaft should
be supported to remove any bending stress
from the shaft.
6) Disconnect discharge pipe flange at the pump
casing.
7) Remove casing bolts (Item 1D) and remove
casing (Item 1) from cover (Item 11).
8) Fix the pump shaft at the coupling and
remove the impeller (Item 2) by turning the
impeller in a counterclockwise (CCW) direc-
tion facing the impeller. A strap wrench or
similar device may be required to disengage
the screw threads. Remove the sleeve cap
(Item 14A) and O-ring (Item 14B) if the pump
is so equipped.
9) Shaft removal for sizes: 1x1
1
/
2
x6, 1
1
/
2
x3x6,
2x3x6, 1x1
1
/
2
x8, 1
1
/
2
x3x8, 2x3x8, 3x4x8,
1
1
/
2
x3x10, 2x3x10, 3x4x10, 4x4x10
a) Remove coupling from the pump shaft and
remove slinger (Item 40) and bearing snap
ring (Item 12B).
b) Slide pump shaft (Item 6) up through the
column and pedestal. If resistance is
encountered, tap on the impeller end with a
soft mallet, or use wood as a buffer.
BE CAREFUL NOT TO DAMAGE SCREW
THREADS AT THE IMPELLER END.
c) Remove set screw (Item 12A).
d) Loosen lock screw in the threaded collar
(Item 66) and unscrew from shaft.
e) Slide bearing holder and bearing off shaft.
If bearing (Item 18) is to be replaced, it
must be pressed off the bearing holder
(Item 12).
f) Unscrew the shaft sleeve if the pump is so
equipped.
care must be taken not to mar or
scratch the shaft in removal or handling.
9A) Shaft removal for sizes: 4x6x10, 3x4x13,
6x8x13, 2x3x13, 4x6x13, 8x10x15
a) Remove coupling and outer screws (Item
37A).
b) Turn adjusting screws (Item 37C) clockwise
completely and jack shaft and bearing
assembly until bearing is clear.
c) Pull shaft and bearing assembly through
the pedestal.
d) Remove bearing housing snap ring (Item
21A).
e) Slide bearing housing (Item 21) from thrust
bearing.
f) Remove snap ring (Item 18B) and press
bearing off shaft.
10) Remove the bearing flush line(s) (127).
11) Remove the column-cover nuts (Item 11B)
and disengage cover (Item 11) from the
column. Note position of cover relative to
column flange.
12) Remove cover snap ring and slide cover
sleeve bearing (Item 93B) and pin (Item 93D)
from the cover.
13) Remove bearing holder nuts (Item 93F) and
remove bearing holders (Item 93) from the
column. Slide the sleeve bearing (Item 93A)
from the bearing holder.
reassembly - Vertical 5500 series
Replace all worn or defective parts as required. Clean
all those to be reused. Reassemble in reverse order
of disassembly, with the following notes:
1) After the shaft is installed in the pedestal and
column, adjust the shaft downward, prior to
installing the impeller.