Xylem 2000 Series Frame Mounted Pumps AC8652 REV.C - Manual (Page 9)

Method 2- For Orange Hytrel Insert, 3500
Operation, or All Other Coupler Types
Except as Noted Below
(See Fig. 5B)
a. Make sure each hub is secured to its
respective shaft and that all connecting
and/or spacing elements are removed at
this time.
b. The gap between the coupling hubs is set
by the manufacturer before the units are
shipped. However, this dimension should
be checked. (Refer to the coupling
manufacturer’s specifications supplied
with the unit.)
c. Scribe index lines on coupling halves as
shown in Fig. 5B.
d. Mount dial indicator on one hub as shown
for parallel alignment. Set dial to zero.
e. Turn both coupling halves so that index
lines remain matched. Observe dial
reading to see whether driver needs
adjustment (See paragraph i below).
f. Mount dial indicator on one hub as shown
for angular alignment. Set dial to zero.
g. Turn both coupling halves so that index
lines remain matched. Observe dial
reading to see whether driver needs
adjustment (See paragraph i below).
h. Assemble coupling. Tighten all bolts and
set screw(s). It may be necessary to
repeat steps c through f for a final check.
i. For single element couplings, a
satisfactory parallel misalignment is
0.004"T.I.R., while a satisfactory angular
misalignment is 0.004"T.I.R. per inch of
radius R (See Fig. 5B).
FIG. 5B – CHECKING ALIGNMENT (METHOD 2)
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 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. Install keys and mount shaft hubs
with flange faces flush with shaft ends or
as otherwise specified. Unless otherwise
specified, BE (Shaft Gap) = 3.5” for
3x2x6.5F 2000 Series Firepump and 5.00”
for 4x3x9F 2000 Series Firepump. Tighten
setscrews.
FIG. 5C – SHAFT GAP
2. Bring the pump and motor halves of the
coupler into approximate height alignment,
by placing equal amounts of shims under
all the motor feet. Tighten the motor bolts.
3. Lightly coat seals with coupling vendor
supplied grease and roll the seal over the
spacer hub teeth into place. Position each
half spacer hub on register of shaft hub
and fasten parts together. Torque
fasteners to specifications in Fig. 5J.
DIAL
INDICATOR
INDEX LINE
RESILIENT
SEPARATOR
DIAL
INDICATOR
ANGULAR
ALIGNMENT
PARALLEL
ALIGNMENT
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