Xylem 9100 Series Base Mounted Centrifugal Fire Pumps AC8585 REV.C - Manual (Page 12)

misalignment is .004"T.I.R. per inch of
radius R (See Figure 6B).
Grid Couplings
NOTE: The following procedure is intended
for mounting and alignment of Rexnord
Industries, LLC. and Clarke Fire Protection
Products, Inc., Tapered Grid Couplings.
Adequate lubrication is essential for
satisfactory operation. Grease supplied by
the coupling manufacturer is highly
recommended. Other greases to be used
should be approved by the coupling
manufacturer.
Alignment is shown using a spacer bar and
straight edge. Rexnord Industries, LLC. and
Clarke Fire Protection Products, Inc. state
this practice has been proven for many
industrial applications. Superior alignment
can be achieved through the use of dial
indicators as shown above.
1. Clean all metal parts using non-flammable
solvent.
2. Lightly coat seals with coupling vendor
supplied grease and place on shafts
before mounting shaft hubs.
3. Install keys and mount hubs with flange
faces flush with shaft ends or as otherwise
specified.
4. Reposition hubs on shafts as required to
achieve the required hub gap shown in
Figure 6H or otherwise specified. The
length of engagement on each shaft
should be roughly equal to the shaft
diameter.
5. Tighten setscrews.
6. Bring the pump and motor halves of the
coupler into approximate height alignment,
by placing equal amounts of shims under
all the motor feet.
7. Tighten the motor bolts.
8. Use a spacer bar equal in thickness to the
gap specified in Figure 6C. Insert bar, as
shown below, to same depth at 90°
intervals and measure clearance between
bar and hub face with feeler gauges. The
difference in minimum and maximum
measurements must not exceed the
angular installation limits shown in Figure
6H.
FIGURE 6C – USING SPACER BAR
9. Align so that a straight edge rests within
the limits shown in Figure 6D on both
hubs as shown below and also at 90°
intervals without rotating the coupling.
Check with feelers. The clearance must
not exceed the PARALLEL OFFSET
installation limits specified in Figure 6H.
FIGURE 6D – USING STRAIGHT EDGE
10. If adjustment is needed, loosen the motor
bolts and add (or remove) an equal
amount of shims under each motor foot to
align the height. To correct side
misalignment, strike the side of the motor
foot with a mallet.
11. Tighten the motor bolts and check again.
If a correction is made, re-check alignment
in all directions. Repeat this process until
the desired result is obtained.
12. Pack gap and grooves with coupling
vendor supplied grease before inserting
grid. When grids are furnished in two or
more segments, install them so that all cut
ends extend in the same direction as
shown below. This will ensure correct grid
contact with non-rotating pin in cover
halves.
13. Spread the grid slightly to pass over the
coupling teeth and seat with a soft mallet.
12