Flowserve Type R - Manual (Page 37)

R and RX SLURRY Pump USER INSTRUCTIONS ENGLISH 71569242 03-11 (E)
Page 37 of 56 flowserve.com
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6.8.8 Suction side Liner (if necessary
a) Place the suction side casing on a clean work
surface.
b) Remove the hex huts that secure the liner to the
casing.
c) Using long bolts in the tapped holes in the center
of the casing jack the liner out of the casing.
Use a pry bar to dislodge the nozzle lip.
d) Lift the casing away from the liner.
6.9 Examination of parts
Used parts must be inspected before
assembly to ensure the pump will subsequently run
properly.
In particular, fault diagnosis is essential to enhance
pump and plant reliability.
6.9.1 Casing, seal housing and impeller
a) Inspect for excessive wear, pitting, corrosion,
erosion or damage and any sealing surface
irregularities.
b) Replace as necessary.
c) Inspect the impeller [2200] and the liners [1916.1]
and [1916.2] for excessive wear or damage. Remove
the liners from the casings [1211 and 1212] if
necessary.
d) Inspect the casing [1211] and stuffing box [4132 or
4100 for expeller] for damage or excessive thinning
of wall sections due to wear or corrosion. Clean the
internal surfaces to maintain pump efficiency.
e) Inspect the protector plate [4132] and impeller
spacer [2460] and remove if damaged or worn.
Clean the internal bore of the stuffing box.
6.9.2 Shaft and sleeve [if fitted)
a) Replace sleeve if grooved, pitted or worn.
b) Clean the shaft and inspect for evidence of
corrosion, evidence of cracking, fatigue or mechanical
damage. Remove all burrs or nicks paying particular
attention to the areas under the lip seals. Check that
the shaft is straight within 0.002 inch (0.050 mm).
6.9.3 Gaskets and O-rings
After dismantling, discard and replace.
6.9.4 Bearings
a) It is recommended that bearings are not re-used
after any removal from the shaft.
b) The plain liquid lubricated bearings may be re-
used if both the bearing bush and bearing sleeve
show no sign of wear, grooving or corrosion
attack. (It is recommended that both the bush and
sleeve are replaced at the same time.)
6.9.5 Bearing isolators, labyrinths or lip seals
(if fitted)
a) The lubricant, bearings and bearing housing seals
are to be inspected for contamination and
damage. If oil bath lubrication is utilised, these
provide useful information on operating conditions
within the bearing housing.
b) If bearing damage is not due to normal wear and
the lubricant contains adverse contaminants, the
cause should be corrected before the pump is
returned to service.
c) Labyrinth seals and bearing isolators should be
inspected for damage but are normally non-
wearing parts and can be re-used.
d) Bearing seals are not totally leak free devices.
Oil from these may cause staining adjacent to the
bearings.
6.10 Assembly
To assemble the pump consult the sectional drawings,
see section 8, Parts list and drawings.
Ensure threads, gasket and O-ring mating faces are
clean. Apply thread sealant to non-face sealing pipe
thread fittings.
6.10.1 Bearing housing
a) Lubricate the internal bores of the bearing frame
[3130] with the same oil or grease used to lubricate
the bearings.
b) Install the thrust bearing housing [3230] in the
bearing frame [3130] to ensure a good sliding fit.
Remove the thrust bearing housing from the frame.
c) Install the oil sight gauge [3856] and the drain lug in
the bearing frame [3130] using Teflon pipe thread
sealant. Install the vent plug [6578].
6.10.2 Line bearing
a) Lightly lubricate the shaft [2110] at the line bearing
position. Install the line bearing [3011] on the shaft.
Use an induction heated or hot oil bath to first heat
the bearing [250
 F recommended], press the
bearing on shaft with the aid of a sleeve designed to
push the inner race only. Note that the bearing must
remain square to the shaft during assembly and that
the inner race must seat on the shaft shoulder.
b) Pack the line bearing with grease if the bearings are
being grease lubricated.
c) Protect the bearing by wrapping with a clean, lint free
cloth.
6.10.3 Thrust bearing
6.10.3.1 Frames 1, 2 & 3
a) Place the thrust bearing clamp ring [2542] loosely
over the shaft on the largest diameter.
b) Install the angular contact bearings [3031] on the
shaft [2110] using the same procedure as described