Technical information

6. Locate and remove the
pump casing bolts. These
bolts secure the motor and
motor adapter to the pump
casing (figure 5.5D).
7. Separate the motor and
motor adapter from the
pump casing to expose the
pump impeller (figure
5.5E). Remove the motor
and motor adapter from
the unit and place on a
workbench to continue the
procedure.
8. Locate and remove the
dust cap from motor end
to expose slotted motor
shaft. The motor shaft is
free to rotate, but must be
secured to remove the
impeller. To secure the
motor shaft, insert a flat
bladed screw driver in slot
to hold the shaft stationary
(Figure 5.5F).
9. Locate and remove the
impeller locking screw
(Figure 5.5G). Using a
socket and ratchet, the
impeller retaining screw
can be removed. Once the
retaining screw is removed,
the impeller can be
“unthreaded” from the
motor shaft to expose the
pump seal assembly.
10. Remove all seal parts
(Figure 5.5H). Note seal
component arrangement
to facilitate reassembly.
11. Clean motor shaft and
lubricate with a mild soap
solution.
12. Install new stationary seal
member in the pump
casing cavity (figure 5.5I).
UGH021/0301 VL Series Portable Chillers, 2 to 40 Tons
Page: 37
Typical pump casing bolts
Figure 5.5D
Motor shaft
Figure 5.5F
Typical impeller
Figure 5.5G
Impeller
Figure 5.5E