Goulds Pumps AF (Axial Flow) (6"-36) MXR Bearings" - Manual (Page 27)

AF (6-36) IOM 25
When using positions 2 and 4 in steps 1-3, correct
any misalignment by sliding the motor back and forth
to attain the proper alignment.
5. Repeat steps 1-4 substituting position 2 for
position 1 and position 4 for position 3. Use the
same marks made on the coupling from position 1
and be sure to turn the coupling halves together.
METHOD 2 - Feeler Gauge Method
For the following steps refer to Fig. 21.
1. Insert a feeler gauge at position 1 at the periphery
of the couplings. Mark this position on both
flanges.
2. Record the largest gauge size that fits snugly
between the two flanges.
3. Rotate both flanges to position 3 - 180
.
4. Insert a feeler gauge at the periphery of the
couplings at position 3
5. Record the largest gauge size that fits snugly
between the two flanges.
6. Calculate the difference between the readings at
positions 1 and 3. The difference should not be
greater than .003" (.076mm).
7. Correct any misalignment by shimming under the
motor or gearbox feet to attain the proper
alignment.
When using positions 2 and 4 in steps 1 - 6, correct
any misalignment by sliding the motor or gearbox
back and forth to attain the proper alignment.
8. Repeat steps 1-6 substituting positions 2 and 4
for position 1 and 3 respectively. Use the same
marks made on the coupling from position 1 and
be sure to turn the coupling halves together.
PARALLEL ALIGNMENT
The unit is in parallel alignment when indicator “P”
(Parallel Indicator) does not vary by more than .003”
(.076mm) as measured at four points on the coupling
periphery 90' apart at operating temperature. There
are two methods outlined below that are acceptable
to achieve the desired alignment.
NOTE: Equal amounts of shims must be added to
or removed from each driver foot. Otherwise the
vertical angular alignment will be affected.
METHOD I - Dial Indicator Method
For the following steps, refer to Fig. 21.
1. Zero the indicator “P” at position 1 of coupling half
(Y). Mark this position on both flanges.
2. Rotate both flanges 180
 to position 3. Observe
needle and record reading.
3. Negative Reading - Coupling half (Y) is shifted
toward position 1.
If the value is greater than .003” (.076mm), correct the
misalignment by evenly (at equal amounts on both
sides) shimming the motor higher.
When using positions 2 and 4 in steps 1 - 2, correct any
misalignment by sliding the motor evenly toward
position 2.
Positive Reading - Coupling half (Y) is shifted
toward position 3.
If the value is greater than .003" (.076mm), correct the
misalignment by evenly (at equal amounts on both
sides) shimming the motor or gearbox lower.
When using positions 2 and 4 in steps 1 - 2, correct any
misalignment by sliding the motor or gearbox evenly
toward position 4.
4. Repeat steps 1-3 until indicator “P” reads .003"
(.076mm) or less.
5. Once the ideal alignment is reached, repeat steps
1-4 substituting position 2 for position 1 and
position 4 for position 3.
METHOD 2 - Straight-Edge Method
For the following steps refer to Fig. 21.
1. Place a straight edge across the two coupling
flanges at position 1 and mark the spot on both
flanges.
2. Adjust the motor or gearbox so that the straight-
edge rests evenly on both flanges (within .003"
.076mm).
3. Rotate both flanges 90
 to positions 2 and repeat
steps one and two.
4. The unit will be in parallel alignment when the
straight edge rests evenly (within .003” .076mm) on
the coupling periphery at both positions along the
periphery.
3