9
a. Disconnect power supply to the motor and remove
motor from baseplate or remove coupling spacer if
spacer type coupling is installed.
b. Remove all cooling or lubricating lines.
c. Remove drain plug (216).
d. Remove cap screws (212) and separate power end
from casing. Fig. 4160 Series - Remove wearing
ring (7) from casing (1) if worn.
e. Remove impeller screw (26), impeller washer (270),
impeller washer gasket (30) and o-ring (272) and
pull impeller (2) from shaft with an impeller or wheel
puller. Remove impeller key (32) from shaft.
f. Loosen gland nuts (210) and remove gland bolts
(209), gland (17) and gland clips (206). The packing
box cover (11) may now be removed from the frame
(19).
g. Remove packing (13) and lantern ring (29) from
packing box cover and clean bore of the cover.
h. If pump is fi tted with single mechanical shaft seal,
mark the position of the seal retainer (230) on
the shaft sleeve (14) to assist in reassembly.
Remove seal rotating assembly (89B) from the shaft
sleeve and stationary seal seat (89A) from the
gland (251).
If pump is fi tted with double shaft seal, push inboard
stationary seal seat (89A) from packing box cover
(11) and the outboard seal seat (89A) from the seal
gland (251). Remove rotating seal assembly (89B)
from the shaft sleeve (14).
i. Remove shaft sleeve (14) from pump shaft (6).
Loosen set screws (211) in defl ector and remove
defl ector (40).
j. Remove pump half of fl exible coupling and key
(46) from pump shaft (6). Remove cap screws
(213), cap screws (332) and jack screws (286) and
pull bearing cover (37) from bearing housing (33).
k. Open tangs of lock washer (69) and unscrew and
remove bearing lock nut (22) and bearing lock
washer (69).
l. Insert small pry bar under fl ange at bearing housing
(33) and carefully force shaft with bearings (18) and
(16), bearing housing (33) and grease retainer (51)
from coupling end of frame (19).
m. Mark location of grease retainer (51) on the shaft
then press grease retainer and bearing (16) from
impeller end of shaft.
n. With bearing puller, remove bearing housing (33)
and bearing (18) from coupling end of shaft. Press
bearing from bearing housing.
o. Wash bearings and bearing cover to remove old
grease. Oil lubricated pumps include o-ring (232) on
bearing housing. Check and replace if nicked or
damaged.
6. REASSEMBLY
Clean and inspect all parts, replacing any worn or damaged
parts, also replace all gaskets and o-rings. Replace
mechanical shaft seal showing worn faces, hardened
elastomer or loss of spring tension.
a. Inspect bearings and replace if worn.
b. Press grease retainer (51) onto shaft to position
marked. Press bearing (16) onto shaft until inner
race of bearing is against shaft shoulder.
NOTE: Press only on inner race of bearing. Apply
fresh grease to bearing if grease lubricated.
c. Carefully press bearing (18) into bearing housing
(33) until properly seated in bottom of bearing
housing. Press bearing housing assembly onto
shaft (6) until inner race of bearing is against shaft
shoulder. Apply fresh grease to bearing and bearing
cover if grease lubricated.
d. Insert shaft assembly into frame (19), from the
coupling end, until there is approximately 5/16”
between fl ange of bearing adapter (33) and end of
frame.
If oil lubricated bearings, apply light oil to exterior of
bearing housing (33) and o-ring (232) and carefully
guide bearing housing into frame to prevent
damage to o-ring.
e. Place bearing lock washer (69) on the shaft and
thread bearing lock nut (22) tight against bearing
lock washer. Bend tangs of washer into bearing
lock nut.
f. Place bearing cover (37) on bearing housing (33)
and replace and tighten cap screws (332). Also
replace cap screws (213) and jack screw with lock
nut (286) and (204) but do not tighten. Replace
shaft key (46) and pump half of fl exible coupling
on shaft.
ALL PUMPS WITH PACKING
g. Place packing box cover on bench and insert shaft
sleeve in bore with keyway down. Insert packing as
described in Section D item 3.
h. Position defl ector (40) on shaft. Apply Permatex or
Silastic sealing material to end of sleeve which will
seat against shaft shoulder and slide entire packing
box cover assembly (11) onto the shaft and align
keyways.
i. Assemble split gland onto shaft and replace gland
clips (206), bolts (209) and nuts (210).
ALL PUMPS WITH SEALS
Before installing any new seal or replacing old seals,
inspect and clean all parts. Remove all burrs, nicks, etc.,
from shaft and sleeve.
j. Place defl ector (40) on shaft and secure. Apply
Permatex or Silastic sealing materials to end of
sleeve that seats on shaft shoulder and slide onto
shaft, lining up keyways.
SINGLE SEAL
CAUTION: Protect the lapped faces of the stationary
seal seat and rotating seal washer during installation.
k. Apply light oil to the outer surface at the stationary
seal seat and o-ring (89A) and press seal seat into
the seal gland (251).
Summary of Contents for DEMING 4060 Series
Page 18: ...Notes ...
