OM-07264
S SERIES PUMPS
PAGE E - 13
MAINTENANCE AND REPAIR
Terminal Housing And Power Cable Reassemb
ly
).
To disconnect the power cable (7) from the termi
nal housing, pull the terminal plate (13) away from
the terminal housing. When shipped from the fac
tory, the connections between the power cable
leads and the terminal posts (17) were encapsu
lated in heat‐shrink tubing (10) and bonded to the
terminal plate with silicone adhesive (not shown).
(In service, the adhesive may have been replaced
by potting compound during previous repair.) If
damage is extensive and the terminal plate and ter
minals are to be replaced, simply cut the power
cable leads above the terminal collars and heat‐
shrink tubing, and discard the terminal plate and
terminals.
If damage is not extensive and it is necessary to re
place the terminal plate or terminal components,
carefully cut away the tubing and adhesive. Dis
connect the power cable leads from the terminal
posts, and separate the terminal plate from the ter
minal housing (1). Unscrew the hex nuts (11), and
remove the terminal posts and dyna seal washers
(15) from the terminal plate. Remove and discard
the terminal plate gaskets (12 and 14).
Remove the hardware (2 and 3) securing the green
and yellow ground leads to the terminal housing.
Reinstall the hardware.
See
Terminal Housing/Power Cable Reassemb
ly
if no further disassembly is required.
Intermediate And Rotor Disassembly
(Figure 1)
See
PUMP END DISASSEMBLY
, and remove all
pump end and seal components.
With the pump end disassembled and the motor
cavity drained of oil, secure the pump in an in
verted position. Remove the hardware (38 and 39)
securing the motor housing (11) to the intermedi
ate (8). If necessary, tap around the parting sur
faces with a soft‐faced mallet to break the seal be
tween the intermediate and motor housing. Re
move the intermediate and discard the motor
housing gasket (10) and O‐ring (36).
Use caution to prevent the rotor (33) from falling on
the stator windings. Carefully pull the rotor and as
sembled bearings (9 and 55) from the motor hous
ing. Reach into the motor housing and remove the
wave washer (15) from the upper bearing bore.
Cover the motor housing with a clean, lint free cloth
to avoid contamination by dirt or other foreign ma
terial.
Bearing Removal
(Figure 1)
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected
in place
. It is
strongly
recommended that the bearings
be replaced
any
time the shaft and rotor
assembly is removed.
Before removing the bearings from the rotor shaft,
clean and inspect the bearings
in place
as follows.
Clean the bearings thoroughly in
fresh
cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven
tilated area; free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain
ers.
Rotate the bearings by hand to check for rough
ness or binding and inspect the bearing balls. If ro
tation is rough or the bearing balls discolored, re
place the bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the motor
housing and bearing bore. Replace the shaft and
rotor (as an assembly), the motor housing or inter
mediate if the proper bearing fit is not achieved.
If replacement is required, use a bearing puller to
remove the upper and lower ball bearings from the
rotor shaft.
