RS – Multi-Stage, I-280
Centrifugal Pump 280 – 16.03.EN
39
NOTE
Rotate the shaft so the mark (arrow) that was
put on during rotor TIR process is pointing
down. Tap with a soft mallet along the suction,
interstage and discharge casings. DO NOT
rotate shaft until both end jam nuts have been
torqued.
34. Install one jam nut (614) and torque to 20 ft/lbs.
Use removable thread locker and install second
jam nut (614) and torque to 30 ft/lbs.
35. Install new lubricated O-ring (89H) on outboard
bearing cap (37A).
36. Secure outboard bearing cap (37A) to discharge
casing (1) with nuts (615) and gland washers
(646) on studs (631).
NOTE
Rotate shaft (6) by hand to ensure smooth
rotation.
37. To install mechanical seal (90*), remove
temporarily installed bearing cap bolts (601),
bearing cap bolt washer (850), inboard bearing
cap (37), and bearing jam nuts (22). Remove
bearing frame bolts (600) and remove bearing
frame (99) with ball bearings (16). Only remove
snap ring (176) if snap ring is bigger than sleeve
(14A). Loosen jam nuts (614) on end of shaft (6)
to aid in snap ring removal. Torque jam nuts on
end of shaft after torqueing bearing jam nuts.
NOTE
Refer to mechanical seal vendor instructions for
complete seal installation procedure.
38. If applicable, install cartridge mechanical seal
(90*) on suction casing (9) with hex nuts (615)
on studs (630). Do not remove seal clip until
mechanical seal installation is complete. Center
drill setscrews on cartridge mechanical seal to
prevent cartridge mechanical seal sleeve from
moving during operation.
39. For type 1 mechanical seals, lubricate both
gland (17A) and stationary element (O-ring) of
mechanical seal (90) with suitable lubricant.
Insert stationary element of mechanical seal into
gland. Install O-ring (89H) on gland and
lubricate. Lubricate inside of suction casing
stuffing box.
40. Install mechanical seal (90) rotating elements
(mechanical seal spring retainer and spring).
Install rubber bellow with rotating seal face by
lubricating sleeve (14A) and inside rubber
bellow of seal and push onto sleeve (14A) up to
mechanical seal spring.
41. Install gland (17A*) on suction casing (9) and
secure with gland washer (646) and gland nut
(615). As applicable, ensure tap flush lines in
gland are positioned so flush lines (400) can be
connected.
42. Install snap ring (176), if removed in step 37,
and bearing spacer (78) with slinger (40) on
shaft (6).
CAUTION
While installing back-to-back ball bearings, DO
NOT unnecessarily hit ball bearings. If damage
to ball bearings occurs, replace damaged ball
bearings with new ball bearings.
After 20,000 Hours of service, replace the
ball bearings.
43. Install bearing frame (99) and secure with
bearing frame bolts (600). Install new ball
bearings (16) back-to-back in bearing frame
(99); back to back meaning lettering on the
outer race facing each other.
NOTE
Put removable thread locker on the second jam
nut refer to Table 14 for recommended torque
values.
44. If snap ring was removed to install mechanical
seal (90*), torque first jam nut (22) to 3 ft/lbs.,
second jam nut with removable thread locker
and torque to 30 ft/lbs. Install jam nuts (614) on
shaft (6) and torque to 30 ft/lbs.
45. Install new bearing isolator (168) in bearing cap
(37). Confirm that the breather vent (405), oil
view sight (143), and plugs (426) are still
installed in the bearing cap. Lubricate and install
O-ring (89F) on bearing frame. Secure bearing
cap to bearing frame (99) with bearing cap bolts
(601), bearing cap bolt washers (850) and
bearing cap bolt O-ring (89W).
46. Install tubing (400 and 401), as applicable.
Secure tubing by tightening nuts on male tube
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