Xylem IM170 G&L SERIES MODEL SVI - Manual (Page 7)

7
• When lubricants are operated at elevated temperatures,
the lubrication frequency should be increased.
• DO NOT intermix grease bases (lithium, sodium, etc.).
Completely purge old grease if changing grease base.
• Over greasing can cause excessive bearing tempera-
tures, lubricant and bearing failure.
1. Close all necessary suction and discharge valves.
2. Remove the coupling guards, the  coupling hex cap
screws, the coupling and coupling drive pin.
3. Remove pump and drain.
4. Remove the  motor hex cap screws. On units with
motor frames 13TC and larger, remove the  motor
adapter flange hex cap screws. With an adequately
sized crane, carefully remove the motor. DO NOT
rest the motor on the motor shaft.
5. Remove the  tie rod nuts and lock washers.
6. Carefully remove the suction bottom and strainer.
Larger units may require an adequately sized crane to
lift the motor adapter. DO NOT damage the shaft.
NOTICE: EDGES OF THE STAINLESS STEEL PARTS
ARE SHARP. WEAR APPROPRIATE PRO-
TECTIVE CLOTHING.
7. Remove the stack and casing.
8. Slide the mechanical seal rotary element, spring and
washer from the pump shaft.
9. Remove the seal stationary element from the pump
discharge head. Discard the entire seal assembly.
10. Lubricate the inside of the new mechanical seal as-
sembly with a quality grade of glycerin.
11. Lubricate the outside of the new mechanical seal sta-
tionary element with a quality grade of glycerin.
1. Insert the stationary seat into the discharge head
with the seal face out. DO NOT scratch or otherwise
damage the seal face. Insure that the stationary seat
is fully seated into the seal housing. With a clean, lint
free cloth, wipe the seal face clean of all lubricant or
debris.
13. To install a new mechanical seal rotary assembly, slide
the assembly onto the pump shaft, spring end first.
Be sure the top spring tip is in the hole of the rotary
portion of the seal. DO NOT scratch or otherwise
damage the seal face. With a clean, lint free cloth,
wipe the seal face clean of all lubricant or debris.
14. Carefully replace the impellers, spacers, bowls and
casing in the reverse order.
15. Install the base and strainer. Tighten the tie rod nuts
and torque to the value provided in the
“ENGINEERING DATA” section of this manual.
16. With an adequately sized crane, carefully lower the
motor onto the motor adapter, lining up the electri-
cal conduit connection and the  motor adapter bolt
holes, as required.
17. Install the  motor hex cap screws, torquing to the
value provided in the “ENGINEERING DATA”
section of this manual.
18. Place the coupling drive pin into the pump shaft and
install the coupling halves onto the motor and pump
shafts. Install the  coupling socket head screws, lock
washers and nuts, DO NOT tighten.
19. Position the motor assembly shim between the cou-
pling and the motor adapter. If the motor assembly
shim is not available, a 0.03" (5 mm) shim may be
used to locate the pump shaft assembly and to set the
correct height.
20. Tighten the  coupling socket head screws, torquing
screws to values provided in the “ENGINEERING
DATA” section of this manual. Tighten evenly so that
the gap between the halves is equal side to side and
top to bottom.
21. Install the  coupling guard halves.
• To remove the motor follow steps 1 through , as
provided in the “MECHANICAL SEAL REPLACE-
MENT” section of this manual.
• For motor frames 13TC and larger, remove the  mo-
tor hex cap screws and the motor adapter.
• Install the motor adapter flange onto the new motor,
torquing the  hex cap screws to the values provided in
the “ENGINEERING DATA” section of this manual.
• Complete the reassembly following steps 16 through
1 in the “MECHANICAL SEAL REPLACEMENT”
section of this manual.
• All additional unit service or maintenance, not
addressed in this manual, should be performed at a
qualified service location. Contact your local dealer or
G&L Pumps distributor for assistance.