JD Series
OM-05724
PAGE E - 6
MAINTENANCE AND REPAIR
PUMP AND MOTOR DISASSEMBLY AND REASSEMBLY
Review all SAFETY information in Section A.
Do not attempt to service the pump end
and/or motor assembly unless all power
to the motor has been shut off at the con
trol box; otherwise, injury or death could
result.
Use a lifting device with sufficient ca
pacity (see INSTALLATION, Section B).
If slings or chains are used to move the
pump or components, make sure that
the load is balanced; otherwise serious
personal injury or death could result.
The following maintenance and repair instructions
are keyed to the sectional views, FIGURES 1 and 2,
and their accompanying parts lists.
Select a suitable location, preferably indoors, to
perform required maintenance. All work must be
performed by qualified personnel. Recommended
spare parts are shown on the parts lists.
Check
TROUBLESHOOTING
, Section D to deter
mine causes and remedies of pump problems.
Disassemble only as far as required.
If a maintenance problem is electrical, see
ELEC
TRICAL TESTING
in
TROUBLESHOOTING
, Sec
tion D.
PUMP AND MOTOR DISASSEMBLY
If necessary to pry components apart to
separate them, use levers on both sides of
the component, and apply pressure even
ly. Be careful not to mar mating surfaces.
when removing parts from the rotor/shaft
assembly, be careful not to mar the surface
or tapered end of the shaft.
PUMP END DISASSEMBLY
Except as noted, all references are to FIGURE
E-1.
NOTE
The volute casing and impeller may be removed
without draining the oil from the pump.
Removing Pump From Stand
1. Engage the lifting handles (231 and 458, FIG
URE E-2) with a suitable lifting device, but do
not apply tension to the mounted pump.
2. Disengage the hardware securing the pump to
the system discharge piping.
3. Remove the screws (164 and 165) securing the
pump to the stand (26). Use the lifting device to
move the pump to a level work surface.
Suction Cover and Volute Casing Removal
NOTE
If the impeller (5) is to be removed, do not remove
the volute casing until the impeller screw (10) has
been loosened. Insert a wood block or metal bar
through the discharge opening to block impeller
rotation while loosening the impeller screw. After
loosening the impeller screw, remove the wood
block or bar, and proceed with volute casing re
moval.
1. Remove the screws (151) and use a pair of
screwdrivers to separate the assembled flange
(150) and suction cover (16) from the volute
casing (11). It is not necessary to remove the
adjusting screws (74) unless replacement is re
quired. Remove the suction cover O‐ring (100).
2. If replacement of the flange (150) or O‐ring
(152) is required, disengage the hardware (28)
and pry the flang off of the suction cover.
