Flowserve MEN - Manual (Page 32)

MEN USER INSTRUCTIONS ENGLISH 71576288 - 02/13
Page 32 of 36 flowserve.com
32) Screw up and stagger according to
recommended torque. Do not use a striking-
face wrench.
33) Check the mobile rotation, which should not
have any jarring.
34) Mount the [6700-01] key on the shaft.
35) You may tighten a little, by hand, the nuts of
the stuffing box.
36) Reset the [9331] work piece guards on
the bearing and the [3134] support foot.
6.8.2 Mechanical seal 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 the bearing cover
rests on the circlips for a bore.
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 on the coupling side; check
its correct position in the groove.
7) Check that the shaft freely rotates without any
hard spot.
8) Check that the axial clearance is located at 0.1
mm (0.004 in.) maximum.
9) Prepare and clean the [1221] casing cover on
the bearing.
10) Tighten screws of the [6577-02] casing cover
with stuffing box according to torque (see table
torque, do not use striking-face wrench to
block).* For the pump 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.
11) Mount the casing cover [1221] on the bearing.
12) Prepare the [4200] mechanical seal.
13) Put O-ring for rotating seal ring and joint O-
ring for stationary seal ring into soapy water.
14) Mount the stationary seal ring in the casing
cover with the set of tools defined in § 6.5.
15) Mount the rotating seal ring, the spring and the
mechanical seal cupel with the set of tools
defined in § 6.5.
16) Prepare the [2250] impeller. Check the vanes
cleanliness.
17) Grease hydraulic rings.
18) Mount the [6700-02] key on the shaft.
19) Mount the impeller on the shaft and avoid
gripping the mechanical seal cupel.
20) Mount the [2905] plain washer.
21) Grease the shaft end threading. Screw up and
tighten the [2912] self-braked nut and respect
torques (see § 6.6).
22) Prepare and carefully clean the [1110] pump
casing.
23) Mount the [6511] and [6515] hexagonal filling
and drain plugs with their [4590-01] and [02]
gasket.
24) Put the pump casing supported on the suction
flange and install the [4590-03] special ring.
25) Present the bearing, the casing cover, and the
impeller hanging vertically from a lifting block
and set the whole in the well-orientated pump
casing.
26) 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.
27) Screw up and stagger according to
recommended torque. Do not use a striking-
face wrench.
28) Check the good rotation of the moving body
(no jarring).
29) Mount the [6700-01]-coupling key on the shaft.
30) Reset the [9331] work piece guards on
the bearing and the [3134] support foot.
These recommendations correspond to a
consecutive assembly and to a complete
dismantling. For a partial dismantling, only certain
areas will be relevant.
6.8.3 Mechanical seal assembly
The mechanical seal assembly does not need any
particular adjustment. The correct setting is
ensured by a clear support of the mechanical seal
cupel on the impeller hub. The stationary seal ring
is set with the help of the tube. The rotating seal
ring, with its joint slid onto the shaft, is set with the
help of the assembly cone and the tube.