18
OPERATION AND MAINTENANCE MANUAL
TR-IS SERIES
Centrifugal Pump
TR-IS
A
SS
E
M
B
L
Y
5d.
Now, insert the whole rotary seal sub-assembly on to the stub-shaft. This will contact the
stationary seal face previously placed in the backplate. Push to compress the assembly and then
insert the impeller key into the stub-shaft. Place the O-ring (
6G
) onto the stub-shaft end; this O-
ring seals between the stub-shaft, the rotary holder, and impeller. Now, insert the impeller and
tight it with the impeller nut. Do not forget to place the impeller gasket into the impeller nut.
Figure Q
.
5e
.
Due to the action of the two springs, it is normal to require some force to compress the
assembly when placing the rotary seal on to the stub-shaft. Tighten the assembly as it is indicated
in step
3c
. Next, tighten the impeller nut. For models
114
and
214,
use a torque value of
25 ft.lb
.
For all other models,
use a torque value of
40 ft.lb
.
Figure R.
Figure
R
Figure
Q
