5.
Support bearing housing (134) and impeller end of shaft (122). Remove hex head bolts (370G) that
secure bearing housing (134) to suction elbow (315A).
6.
If packing is used, disassemble the gland (107), packing (106), and lantern rings (105) from stuffing
box. If mechanical seal (383) was used, please see the mechanical seal IOM for proper removal of
seal.
7.
With the power end properly supported. Carefully pull it from suction elbow (315A).
8.
The shaft sleeve (126) can be removed by loosening set screw and sliding the sleeve from shaft
(122). Be sure to retain the sleeve key (128D).
6.2.3 Disassemble the Power End
WARNING:
Lock out driver power to prevent electric shock, accidental start-up and physical injury.
1.
Lockout power supply to motor.
2.
Close suction and discharge valve.
WARNING:
The pump may handle hazardous and/or toxic fluids. Skin and eye protection may be required.
Precautions must be taken to prevent injury or environmental damage.
1.
Remove piping from pump.
2.
Remove coupling guard and coupling (direct connect) or belt guard and belts (belt drive).
3.
Drain oil from bearing housing, disconnect oil circulation system, and remove pump from sub-base.
4.
Wash down pump with appropriate cleaner.
5.
Disassemble Pump per instructions per that section. Discharge piping and impeller (101) will be dis-
assembled. The power end with the shaft (122) will be removed from the elbow (315A).
6.
Remove cap screws (370H) fastening thrust bearing retainer (109) to bearing housing (134). Care-
fully pull retainer over shaft. Top suction pumps have thrust bearing (112C) at the outboard location
and the thrust bearing stationary race and (6) small springs (9890) may be jarred free. Do not dam-
age oil seal (332).
7.
Be sure overhung portion of shaft is supported.
8.
Remove cap screws (370F) fastening radial bearing retainer (119B) to bearing housing (134). Care-
fully pull retainer away from bearing housing without damaging lip seal (333).
9.
Disassemble bearing halves by removing bolts and knocking out taper pins. Carefully lift top half.
The shaft (122) with bearings can be lifted from bottom half of housing
10. Remove thrust end locknut (136) and lockwasher (382).
a) For top suction pumps see
8.2.1 42-54 (Top Suction) AF with LMR Bearings on page 66
thrust bearing (112C), thrust bearing sleeve (196) and thrust bearing spacer (237) can be
pulled from shaft (122). Press or pull radial bearing (112) from shaft by applying force on inner
race bearing.
b) For end suction pumps see
8.2.2 42-54 (End Suction) AF with LM Bearings on page 66
the entire thrust bearing stack off by pushing against stationary race of thrust bearing (112C).
11. Loosen set screws and pull oil wheel (248) off shaft.
12. Push inboard radial bearing (168C) off shaft toward coupling end by applying force on bearing inner
race with a press.
6.2 Disassembly
54
Model AF (42"/1200mm/54"/60"/66") LM/LMR Bearings Installation, Operation, and Maintenance Manual
