User Manual

ManualsBrandsSpencer ManualsEquipment4BOB Multistage Centrifugal Blowers

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Lase

r systems have significant advantages such as reduced

maintenance costs and energy consumption; prolonged life for

bearings, seals and couplings; decreased bearing temperatures

and lower vibration levels. Many laser systems also identify and

measure soft foot conditions.

NOTE: Consult an alignment specialist if laser equipment is not

available.

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This

method may be done electronically following the instru-

ment manufacturerʼs instructions or by means of dial indicators

as follows:

1. Reinstall the coupling sleeve, seal and snap ring.

2. Clamp dial indicators on shafts 180° apart as shown.

3. Place indicator probes on opposite shafts as shown.

4. Rotate both shafts simultaneously in the correct operating

direction, taking readings at 90° intervals.

5. Adjust motor to achieve parallel and angular alignment. If

questions arise, contact the Spencer Service Department.

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1. R

emove old lubricant and clean the hub teeth.

2. Set a machine shop quality straightedge across the coupling

hubs (at the root diameter of the gear teeth).

3. Adjust the motor so the straightedge is evenly supported

between the coupling hubs at the 3, 6, 9 and 12 oʼclock

positions.

4. Using a feeler gage, measure the clearance between the

coupling hubs at the 3, 6, 9 and 12 oʼclock positions.

5. Adjust the motor so the gap is identical at all four positions

and in accord with the table of hub to hub gaps.

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Use a

flange-type gear coupling for both 1800 and 3600 RPM

motors. Do not use a sleeve-type coupling.

Sleeve bearing motors have a specified end play. End play limits

and the magnetic center (where motor will run) should be

scribed on the shaft by the manufacturer.

Use the following procedure to align a sleeve bearing motor

with a blower.

1. Make sure the motor shaft is level.

2. Position the motor so that when the rotor is pushed toward

the blower as far as it will go, there will 0.030" clearance

between the ends of the motor and blower shafts (or the

alignment faces on the coupling hubs).

3. Proceed with coupling alignment using the appropriate

instructions.

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• M

ake sure the blower is level before alignment.

• Mark the axial location of the motor before alignment as a

reference point to be sure it does not move.

• Avoid disturbing any factory-installed shims unless they are

to be replaced.

• Do soft foot corrections first; loosen all mounting bolts before

correcting any foot.

• During the final vertical adjustment of the motor, work on

one side at a time, loosening the jack bolts first so the motor

does not move laterally as mounting bolts are loosened.

• Use the smallest shim that will slide over the mounting bolts.

• Minimize the number of shims. One thick shim and 2-3 thin

shims are usually satisfactory.

• Remove all traces of dirt or contaminants from shims and

machine parts.

• Use stainless steel shims only.

• Never reuse shims.

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Blower Shaft Motor Shaft

Straightedge

Feeler Gage

Motor

Shaft