Spencer Power Mizer Multistage Centrifugal Cast Blowers - Manual (Page 10)

10
The fill rate is slow on Series 3000, 4000, 5000, and 6000
machines. Let these machines sit, preferably overnight, until
the oil is stabilized. If waiting is not possible, fill the sumps
from the top vent–recognizing that this procedure can result in
high oil levels as oil drains off internal components.
Series 7000, 8000
Oil Height Settings
Power Mizer Series 7000 and 8000 blowers have nonad-
justable oilers hard-piped directly into the sump. There is no
need to check oil height settings but make sure the sump and
oiler are level.
Filling Oilers
Replenish oil in the reservoir only after it drops below half full,
which will reduce the number of refills. If the oiler needs fre-
quent filling, this is not normal–look for an oil leak.
Note: Oilers ‘nuisance feed’ as the reservoir is screwed off
and on, which can lead to an overfilled sump. Screw the oiler
reservoir quickly to minimize overfilling. Tighten the reservoir
only hand-tight.
Allow the oil to stabilize for one hour. Fill the oiler with Mobil
SHC626 or equivalent, replace the oiler screw reservoir, and
tighten it to allow the oiler to feed. Repeat as necessary until
the oiler stops feeding (bubbles stop appearing). The oil level
should be at or slightly above the center of the oiler sight
glass (lower portion of oiler).
Use only approved lubricants (see page 7).
CAuTIOn: Oilers must be filled and checked for proper
oil level after each oil change.
CAuTIOn: Do not mix oils. Thoroughly drain the bearing
sump and oiler before changing to a different oil.
Flexible Couplings
Couplings are lubricated at the factory with Texaco Code 1912
coupling grease and should be relubricated with identical or
compatible grease every six months.
Two coupling lubrication ports are located 180° apart.
Remove the setscrew lube plugs from both ports. Install a
grease fitting in one port and rotate the coupling until the
grease fitting is angled down at 45°. Pump lubricant in until it
appears at the upper port. Remove the grease fitting and
replace and tighten the lube plugs.
VIII. Maintenance
WARnInG: DISCOnnECT AnD LOCk OuT ELECTRICAL
POWER BEFORE PERFORMInG MAInTEnAnCE.
Blower Bearing Removal
and Replacement
NOTE: Refer to the appropriate view for the blower series
involved. Some bearing system details may vary from those
illustrated.
CAuTIOn: note and record the orientation of the bearing
housing and components, taking care to retain their
position. Positioning may vary between grease and oil
lubricated machines.
These illustrations (page 11) and instructions apply to the
drive side of the blower. Bearings on the non-driven side are
serviced the same, except the coupling guard, coupling, and
motor need not be removed. Bearing housings are similar on
both the inlet and discharge ends and serviced in a similar
manner.
Series 1500
Bearing Removal Procedure
1. Remove the belt guard.
2. Release the tension in the belt drive and remove the belt.
3. Remove the belt pulley from the blower shaft.
4. Remove the bearing cap, locknut and lockwasher from the
bearing housing.
5. After removal of the bearing housing screws, attach
a flange type puller using the threaded holes for the
bearing cap. Carefully remove the bearing housing and
the bearing using the attached puller.
6. Remove the bearing from the bearing housing.
Bearing Replacement Procedure
1. Install components in reverse order of disassembly, starting
with the installation of the bearing housing onto the blower.
2. Ensure that the bearing is completely seated on the shaft.
3. Lubricate according to the instructions on pages 8 and 9.
Checking and Adjusting Belt Tension
1. Remove the belt guard.
2. Use a tension checker to measure the belt deflection force
in lbs. Refer to belt catalog tables for the correct deflection
and tension values for your specific combination of belts and
pulleys. Correct belt tension has been achieved when the
measured deflection falls within the recommended range.
3. Use the adjustment screws on the motor slide base to
move the motor closer to the blower if belt tension is too
high, or further from the blower if tension is too low.
4. Replace the belt guard.
Series 2500, 3500
Bearing Removal Procedure
1. Remove coupling guard.
2. Split the coupling halves, recording the relative position of
the motor and blower shafts (not the coupling shells).
3. Unbolt and move motor (if required).
4. Use puller to remove blower coupling half. Apply heat if
necessary.
5. For oil-lubricated bearing, drain all oil by removing drain
plug from the bottom of the bearing sump.
6. Remove bearing cap.
7. Remove shaft locknut, lockwasher, spacer, oil slinger,
bearing retainer and sump if present.
8. Remove bearing housing bolts.
9. Using a two-arm puller and the two tapped puller holes
(5/8" or 1/2") in the bearing housing, remove housing, bear-
ing, bronze seal and grease slinger, if present, as a unit.
10. ‘Drift’ the bearing out of the housing. Note: Watch for a
thrust washer that some bearings have behind the bearing.