Flowserve MEN - Manual (Page 31)

MEN USER INSTRUCTIONS ENGLISH 71576288 - 02/13
Page 31 of 36 flowserve.com
e) Dismantling of bearing:
Remove the [2540] thrower, the [6544] circlips,
the [3260] bearing covers, the [2110] shaft and
bearing housing. Remove the [3011] shaft
radial ball bearings.
6.7.1.2 Dismantling of a MEN pump with the
mechanical seal GM option
DISMANTLING OPERATIONS
a) Loosen the [6577-01] hexagon bolts (or [6577-
02] for gripped casing cover with stuffing box)
and remove the complete rotor set.
b) Release the [2912] nut, remove the [2905]
plain washer, the [2250] radial flow impeller,
the [6700-02] key sub.
c) Loosen the [6577-02] hexagon bolts (if casing
cover with stuffing box is not gripped) and
remove the [1221] casing cover with the fixed
ring of the [4200] mechanical seal. Remove
the fixed ring of the [4200] mechanical seal
from the [1221] casing cover with the stuffing
box.
d) Dismantling of bearing: remove the [2540]
thrower, the [6544] circlips, the [3260] bearing
covers, the [2110] shaft and bearing housing.
Remove the [3011] shaft radial ball bearings.
6.8 Assembly
6.8.1 Packing option
ASSEMBLY OPERATIONS
1) Mount the [3011] radial ball bearings with
press in support on the [2110] pump shaft
collars. Do not press on the outer bearing race
but on the inner one.
2) Press the [3260] bearing cover, pump side.
3) Press the [6544] circlips and check its position
in the bearing arrangement, pump side.
4) Turn over the bearing and attach the bearing
cover with the circlips.
5) Put the bearing housing vertically, pump side,
supported on the workbench, press together
the shaft + radial ball bearings + [3260]
bearing cover (coupling side) into the bearing
housing. Position the bearings in their
arrangements without pressure, (press on the
outer bearing race, if the [3260] bearing cover
is not mounted).
6) Press the circlips [6544] on the coupling side;
check its correct position in the groove.
7) Check that the shaft freely rotates without any
jarring.
8) Verify that the axial clearance is between 0.1
and 0.5 mm (0.004 and 0.020 in.).
9) Mount the [2540] rubber thrower against the
pump cover (at 1 mm or 0.04 in.).
10) Carefully degrease the surface of the shaft
sleeve of the [2110] shaft and the [2450] bore
of the sleeve.
11) Spray the "T of LOCTITE" activator on the
shaft sleeve surface.
12) Lay down the 601 "LOCTITE BLOCPRESS"
glue on the shaft surface and in the bore of the
[2450] sleeve.
13) Press the shaft sleeve on the shaft surface
(big external bevel towards the pump) by
rotating to spread well the glue. Wipe up the
excess glue. Let the Loctite glue polymerize
for at least 15 min.
14) Prepare and clean the [1221] casing cover
with stuffing box.
15) Press the [4130]-gland packing taking care to
stagger the joints by 90° to each other. (See
the paragraph concerning the stuffing box
conception). Press the [4131] follower.
16) Press the [6572] stuffing box studs and
thoroughly tighten.
17) Lubricate the external diameter of the [4120]
gland flange.
18) Assemble the [4120] gland flange and screw
up the [6581] hexagon nut by hand.
19) Check by hand that the shaft sleeve is secured
well to the shaft.
20) Mount the [1221] casing cover with stuffing
box on the bearing, and adjust it suitably (stud
of the stuffing box in the horizontal axis).
21) Tighten screws of the [6577-02] casing cover
with stuffing box according to torque (see
torque table, do not use striking-face wrench
to block).
* For the pumps 50-32-125, 65-40-125, 65-50-
125, 80-65-125, 50-32-160, 65-40-160, 100-
80-200 and 125-100-200, the [1221] casing
cover with stuffing box is gripped between the
[3200] bearing and the [1110] pump casing
and will be fixed only when the pump casing is
mounted with [6577-02] hexagon bolts.
22) Prepare the [2250] impeller, carefully check
water lines and clean them if necessary.
Lightly grease hydraulic rings.
23) Mount the [6700-02] key on the shaft.
24) Mount the impeller on the shaft.
25) Mount the [2905] plain washer.
26) Grease the threaded shaft end. Screw up and
tighten the [2912] self-braked nut while being
careful with torques (see § 6.6).
27) Prepare and carefully clean the [1110] pump
casing.
28) Mount the [6511] and [6515] hexagonal filling
and drain plugs with their [4590-01] and [02]
gaskets.
29) Put the pump casing supported on the suction
flange and install the [4590-03] special ring.
30) Suspend the bearing, casing cover and
impeller arrangement vertically from a lifting
block and set lower the whole arrangement
into the well-orientated pump casing.
31) Prepare the [6577-01] or [02] hexagon bolts.
For the pump of types MEN 80-65-125, 80-65-
160, 80-65-200L, 100-80-160, 125-100-250L,
put a tightness product such as
"TUBETANCHE 577" on these bolts.