14
MOTOR LUBRICATION
Recommended Motor Bearing Lubrication Intervals
Interval
Service Environment
1 – 2 Years
Light Duty in Clean Atmosphere
1 Year
8 – 16 hours/day – Clean, Dry Atmosphere
6 Months
12 – 24 hours/day – Moisture Present
3 Months
12 – 24 hours/day – Dirty, High Moisture
When lubricants are operated at elevated tempera-
tures, 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.
(e-SV 1–125)
1. Close all necessary suction and discharge valves to
isolate the pump from the system.
2. Drain the liquid from the pump by removing the
drain plug and opening the needle valve on the
vent plug.
3. Remove the coupling guards, the 4 coupling hex
cap screws, the coupling and coupling drive pin.
See 1-3, Figure 5.
4. Remove the 4 motor hex cap screws (inner screws)
on the seal housing. See step 4.
5. Remove the seal housing plate on 33-125SV
models, using the two tapped holes provided.
Threading 2 of the hex cap screws into these
holes and evenly tightening the screws. Lift and
remove the seal housing between the pump and
motor shaft. Exercise care when sliding the seal
housing between the shaft to prevent damage to
the stationary seat. See step 5.
6. Turn the seal housing upside down and remove
the stationary seat and o-ring. Remove and discard
the large o-ring used to seal the seal housing
to the pump head. Inspect the seal seat for any
burrs or debris. Make sure that the seat is clean.
Lubricate the shaft or sleeve lightly. Use a water-
based lubricant. Install the new seat by pressing
the seal housing with your thumb. DO NOT USE
EXCESSIVE FORCE and, if possible, place a clean
soft cloth over the seal face to protect the seal
faces during installation.
7. Remove the rotary portion at the mechanical seal
by sliding the rotary unit axially upwards along
the pump shaft. Inspect the pump shaft for any
burns or debris. Any burrs should be ground
smooth with (fine grit) emery paper. See step 7 in
Figure 5.
8. Lubricate the o-ring located in the ID of the
rotary unit of the mechanical seal with a lubricant
compatible with the seal elastomers. Carefully
slide the rotary unit of the mechanical seal down
the shaft. Rotate the seal to locate the pin on
the bottom of the seal with the holes in the shaft
sleeve (33-125SV only). Cycle seal up and down to
lubricate o-ring and prevent seal from sticking to
shaft. See step 8 in Figure 5.
9. Install a new seal housing o-ring on the seal
housing. A lubricant can be used to hold the
o-ring on the diameter of the seal housing.
Carefully reinstall the seal housing between the
pump and motor shaft and slide the seal housing
down the shaft into position. Use caution when
mounting the seal housing between the pump/
motor shaft so that the seal face on the stationary
seat is not damaged. See step 9 in Figure 5.
10. Reinstall the 4 hex cap screws, tightening the
screws evenly and then torquing them to the
values given in the engineering data. See step 10
in Figure 5.
11. Reinstall the coupling pin and locate the space
shim on the shaft on the seal housing. If the shim
is not available, a 5 mm spacer can be used. See
step 11 in Figure 5.
12. Reinstall the coupling halves and evenly tighten
the coupling bolts and torque them to the values
given in the coupling section. Remove the spacer
shim and save for future use. See step 12 in Figure
5.
13. Rotate the shaft by hand to insure that the pump
and motor rotate freely. Reinstall the coupling
guard.
14. The pump and system should be vented prior to
starting the pump. See Section 3, page 13, for
venting procedures.
(Sizes 33SV-125SV) Fitted with Cartridge Seals
1. Complete steps 1-4 as defined above for conven-
tional seals.
2. Loosen the 4 set screws located around the ID of
the pump shaft.
3. Remove the cartridge seal using the two tapped
holes provided on the gland of the cartridge seal
by threading two of the hex cap screws into these
holes and evenly tightening these screws. Lift and
remove the cartridge seal between the pump and
motor shaft.
4. Inspect the pump shaft for any burrs or debris.
Any burrs should be ground smooth with (fine
grit) emery paper.
5. Install a new o-ring on the turned fit of the new
cartridge seal. Lubricate the o-ring located in the
ID of the cartridge seal. Use a lubricant compat-
ible with the seal elastomers to hold the o-ring.
6. Install the new cartridge seal on the pump by care-
fully sliding it between the pump and motor shaft
and then sliding it into position.
7. Complete steps 11-14 as defined above for the
conventional seals.
8. After installing the coupling, tighten the four set
screws located in the collar of the cartridge seal to
secure the seal to the pump shaft.
9. Rotate the shaft by hand to insure that the pump
and motor rotate freely. Reinstall the coupling
guard.
10. Use vent connections on cartridge seal for proper
venting.
