USER INSTRUCTIONS POLYCHEM GRP ENGLISH 71569132 12-04A
Page 36 of 52
flowserve.com
h) Remove the seal or packing gland nuts [6580.2] if
so equipped.
Figure 6-8
Figure 6-9
6.8.3 Removing the rear cover and seal
a) Remove the cover bolts [6570.4] and lockwashers
[6541.3] from the bearing housing [3200] (on Group
1 units) or support head [1340] and remove the
cover. Sizes 2K3x1.5G-10, 2K4x3G-10 and
2K6x4G-10 do not have bolts so remove the nuts
and eccentric washers instead, but there is no need
to remove the studs. (See figure 6-10.)
Figure 6-10
b) Remove the shaft sleeve [2400], gland [4120],
and seal [4200].
c) Remove cover nose gasket [4590.1] (or gland to
cover gasket on Group 3) together with the gland
[4120] and sleeve-to-shaft O-ring [4610.4]
(Groups 1 and 2).
d) If a component type inside mechanical seal [153]
is used, loosen the set screws on the rotating unit
and remove it from the shaft (see figure 6-11).
Then pull the gland [4120] and stationary seat off
the shaft. Remove the stationary seat from the
gland. Discard all O-rings and gaskets.
Figure 6-11
e) If a component type outside mechanical seal is
used, remove the gland and the stationary seat.
Remove the stationary seat from the gland.
Loosen the set screws in the rotating unit and
remove it from the shaft. Discard all O-rings and
gaskets.
f) If packing [4130] is used, remove it and the seal
cage [4134]. Remove the gland [4120].
g) The shaft sleeve [2400] can now be removed.
Unit now appears as shown in figure 6-12.
Figure 6-12
6.8.4 Power end disassembly
a) If the power end is oil lubricated, remove the
drain plug [6569] and drain the oil from the
bearing housing [3200].
b) If the pump has lip seals, a deflector [2540] may
be present. Slide it off the shaft.
c) Loosen the three set screws [6570.3] on the
bearing carrier [3240]. The bearing carrier must be
completely unscrewed from the bearing housing.
Do not pry against the shaft.
Mark 3A and ANSI 3A design
. The face of the
bearing carrier has three square lugs that protrude
from the surface. The bearing carrier is turned by
using an open end wrench on one of the square
lugs as shown in figure 6-13. Because the O-rings
[4610.2] will cause some resistance in removing
the bearing carrier assembly from the housing,
hold the bearing carrier flange firmly and with
slight rotation, pull it out of the bearing housing.
The bearing carrier assembly with the shaft and
bearings should come free.
