Flowserve DMX - Manual (Page 44)

DMX/DMXD/DMXH/DMXDH USER INSTRUCTIONS ENGLISH 85392728 - 10/09
Page 44 of 60
the two top bolts at the adjusting screws. Ream
the dowel holes and install dowel pins [6810].
Loosen adjusting screws and tighten the two top
bearing housing bolts.
6.8.10 Centralize rotor axially
a) Pour a small amount of oil on thrust collar and
thrust shoes. Install inboard thrust bearing
assembly.
b) Make sure center mark on masking tape is in line
with Seal Chamber face per Step e) of check
rotor axial float instructions.
c) Install dial indicator on thrust bearing housing
[3200] so indicator contacts end of shaft. Set
indicator at zero.
d) Push rotor outboard to ensure contact between
thrust bearing [3013] and bearing housing [3200].
e) Read the distance the shaft moved on the dial
indicator. This is the amount of shims [3126] to
be installed between thrust collar [3610] and
shoulder of shaft.
f) Remove masking tape.
6.8.11 Final bearing assembly
a) Remove inboard thrust bearing assembly.
b) Roll out both lower half bearing linings [3020].
Remove both bearing housings [3200].
c) Remove thrust collar lock nut [3713] and thrust
collar [3610].
d) Install both completely assembled mechanical
seals to shaft . Insert into seal chamber. Do not
tighten gland nuts [6580] or mechanical seal
drive collar at this time.
e) Position inboard flingers [2540] and outboard
flingers [2540] onto shaft and place in their
approximate position. Refer to pump sectional
drawing in section 8 of this manual.
f) Slide inboard thrust bearing seal ring [4010] over
shaft (refer to thrust bearing drawing and
instructions). Rest it on shaft in its proper
position. (Refer to pump assembly drawing).
g) Install shims [3126}.
Ensure proper thickness of shims [3126]
are seated against shoulder on shaft.
h) Install thrust collar key [6700], thrust collar
[3610], and lock nut [3713]. Tighten lock nut and
tighten set screws in lock nut.
Before installing thrust collar [3610] onto
shaft, heat the thrust collar to 104 °C (220 °F) (M AX.)
in successive stages working from periphery towards
centre.
i) Rig bearing housings [3200] to an overhead
hoist. Assemble bearing housings [3200] to
casing. Install dowel pins [6810] and snug cap-
screws [6570].
When installing bearing housings to casing,
ensure flingers [2540] are properly positioned with
the inner part of the bearing housing. Refer to pump
sectional drawing in section 8 of this manual.
j)
Tighten bearing-body-to-casing screws [6570] to
the proper torque value.
Ensure dowel pins [6810] seat correctly to
obtain rotor alignment.
k) Wipe a film of oil on journal area of shaft. Place
lower half of bearing lining on shaft. Wipe a film
of oil on lower half of bearing lining. Roll lower
half of bearing lining into lower half of bearing
housing [3200].
l) Place upper half of bearing lining [3020] in
position on top of shaft.
m) Ensure bearing housings [3200] and parting-
flange surfaces are clean and free of dry
“permatex”. Coat flange with new “permatex”.
Assemble bearing housings [3200]. Install dowel
pins [6810] and cap-screws [6570]. Tighten cap-
screws to the proper torque value.
n) Assemble lower half of bearing lining [3020] to
thrust bearing housing in the same manner as
Step k).
o) Assemble upper half of bearing lining [3020] in
the same manner as step l).