JD Series
OM-05724
PAGE E - 16
MAINTENANCE AND REPAIR
7. After testing the upper seal, proceed with
PUMP END REASSEMBLY
.
Cooling Jacket Installation
Except as noted, all references are to FIGURE
E-2.
1. To support the motor assembly while installing
the cooling jacket, place the volute on the work
surface, lower the motor assembly into the vo
lute, and secure it with the screws (13, Figure
1).
2. Remove the screws (233) securing the lifting
handle (231) to the motor top cover (230), and
remove the handle.
3. Ease the cooling jacket (402) over the motor
top cover (230) and motor housing (302). Tap
on alternate sides of the jacket with a soft‐faced
mallet until the jacket is fully seated on the seal
housing (257)
. Make certain that the O‐rings
(401 and 403) remain in place.
4.
To complete installation, position the lifting
handle (231) on the rim of the cooling jacket
(402) and secure it with the screws (233).
5. Reinstall the lifting handle, remove the screws
(13, Figure 1), and remove the motor assembly
from the volute casing.
6. Proceed with
PUMP END REASSEMBLY
.
SEAL TESTING
All references are to FIGURE E-1.
The seal assemblies should be tested under pres
sure and submerged in water before the pump end
components are assembled.
Compressed air used in testing
must be
dry
. Moist air in the motor housing will
cause the moisture switch to trip.
Test 1: Upper Seal Integrity
This test is conducted with the pump un
der power. Refer to the wiring diagram
and observe all precautions outlined in
INSTALLATION, Section B when con
necting the motor cable to the control
box; otherwise, the pump could be dam
aged, and personnel exposed to injury
or death.
1. There are two screw plugs (268) in the seal
housing (257), and one in the motor housing
(302). Remove either plug and O‐ring (269) in
the seal housing.
2. Thread an air hose adapter into the plug hole;
install an air hose.
3. Remove the screw plug and O‐ring (268 and
269) from the motor housing.
4. Thread an air hose adapter into the plug hole;
install an air hose.
5. Connect the motor cable leads to the control
box.
Do not
apply power to the motor at this
time.
6. Submerge the motor assembly horizontally so
that both hose connections are covered.
7. Apply 14-15 psi pressure maximum to the
both
air hoses.
In the following steps
do not
apply
power
for more than 10 seconds
. Otherwise, the
unlubricated seal will overheat and may
burn.
8. Briefly apply power to the motor, and check for
air bubbles.
9. If air bubbles appear, shut off power, then apply
again. If air bubbles persist, the seal and/or mo
tor cover are leaking.
