I-120
GH Pump 120 – 16.02.EN
20
CAUTION
Use a hoist with adequate lifting capacity; refer
to Section VII, Paragraph B, for lifting the
complete unit.
When pump is handling hazardous fluid,
extreme care must be taken to ensure safety of
personnel when attempting to drain pump and
piping before disconnecting the pumping unit.
Suitable protection devices should be used
and/or protective clothing should be worn.
Applicable hazardous material procedures must
be followed.
NOTE
Mark or number each component while
dismantling according to sequence.
The individual components should be
unscrewed or removed.
1. Complete Section XI, Paragraph A before
continuing with disassembly.
2. Remove coupling guard (*131) and disconnect
coupling (*42) from frame mounted pump.
3. Disconnect tubing and tube fittings, as
necessary.
CAUTION
Use a hoist with adequate lifting capacity; refer
to Section VII, Paragraph B, for lifting the
complete unit.
4. Unbolt bearing frame (*19) or motor (*200) from
base and move pumping unit to open working
area.
5. Remove splash guard (131A) from motor
adaptor (71*) if splash guard hasn’t already
been removed.
NOTE
Take special care during disassembly with the
mechanical seal rotary and stationary elements
when removing the casing off the shaft.
6. On frame-mounted pumps, remove capscrews
(600*) from backcover (11) and casing (1).
Remove rotary assembly from casing and take
to a suitable work area.
7. On close-coupled pumps, remove nut (600*)
from bolt (601*) from motor adaptor (71),
backcover (11) and casing (1). Remove rotary
assembly along with motor and take the items to
a suitable work area.
8. Remove hex nuts (615) and flat washers (645)
from studs (630). Slide gland (17) towards
slinger (40) to release tension on mechanical
seal (*90) or slide back and remove gland
halves from packing rings (*180).
9. Remove impeller capscrew (26), impeller O-ring
(89C), impeller washer (28), and impeller gasket
(73X). The best tool to remove impeller
capscrew is a hex wrench welded to a socket
head.
10. Remove impeller (2 or 3) from shaft (*6).
Remove impeller key (32).
11. Remove capscrews (*601) from bearing frame
(*19) and motor adaptor (*71). Remove
backcover from motor adaptor and from shaft
(*6). Remove O-ring (89) from backcover and
discard.
NOTE
Refer to mechanical seal (*90) vendor
instructions for proper mechanical seal removal
procedure.
DO NOT remove rotating element of
mechanical seal (*90) from shaft sleeve (*14),
at this point, especially if mechanical seal is
relatively clean and in good working condition.
12. On pumps equipped with mechanical seal (*90),
remove seal spacer (*68), sleeve gasket (73),
and shaft sleeve (*14) with mechanical seal
from shaft (*6). Inspect rotating element of
mechanical seal before removing from shaft
sleeve. If replacement is required remove
rotating element of mechanical seal from shaft
sleeve.
13. Remove old packing (*180), lantern ring (*29)
and packing retaining ring (*63) from backcover
(11).
14. Remove gland (17), and O-ring (89X) from shaft
(*6).
15. Remove slinger (40) from shaft (*6). If the
slinger is damaged and needs replaced or it is
necessary to replace the ball bearings (*16 or
*18).
16. Remove capscrews (605) and remove motor
adaptor (71) from motor.
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