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Frame-Mounted Units Only
• Alignment MUST be checked prior to running. See FIGURE 2.
• Tighten all hold-down bolts before checking alignment.
• If realignment is necessary, always move the motor.
Shim as required.
• Parallel misalignment, shafts with axis parallel
but not concentric: place dial indicator on one hub
and rotate this hub 360° while taking readings
on the outside diameter of the other hub. Parallel
alignment is achieved when reading is 0.010-inch
(0.254 mm) total indicator reading (TIR), or less.
• Angular misalignment, shaft with axis concentric
but not parallel: place dial indicator on one hub and
rotate this hub 360° while taking readings on the
face of the other hub. Angular alignment is
achieved when reading is 0.020-inch (0.508 mm) TIR,
or less.
• Final alignment is achieved when parallel and
angular requirements are satisfied with motor
hold-down bolts tight.
NOTICE: Always recheck both alignments after making
any mechanical adjustments
TABLE 1: Bellhousing Dimensions
A
SAE No.
mm
1
511.18
20.13
2
447.68
17.63
3
409.58
16.13
4
361.95
14.25
5
314.33
12.38
Note: Dimensions are for estimating purposes only. Certified dimension drawings are available on request. All dimensions in inches.
6
FIGURE 2
B
in
mm
in
530.23
20.88
552.45
466.73
18.38
488.95
428.63
16.88
450.85
381.00
15.00
403.23
333.38
13.13
355.60
SAE-Engine Drive Pumps
Requirements For Proper Operation
Pump End:
When delivering the required capacity/gallons per minute (gpm)
to the system piping, the pump must add the amount of head
required by the system at the capacity. The operating head-
capacity point should be as close as possible to the highest
efficiency line shown on the performance curve, and must be
below the head-capacity line labeled "maximum" revolutions
per minute (rpm). The maximum operation rpm for the pump is
determined by bearing life, or in some cases, by the pressure limits
of the pump. Suction and discharge openings are National Pipe
Thread (NPT) tapped for standard pipe, or faced and drilled per
ANSI B16.1, class 150 for standard flanges as indicated. Maximum
working pressure for class 30 cast iron, per ANSI B16.1, is 175 psi.
Engine:
Internal combustion engines are variable speed, variable power
machines. The power output depends on the engine speed/
rpm and will be reduced when operating altitude, and/or the air
temperature increases. When driving the pump at the rpm required
to deliver water into the system piping, the engine must operate
within the engine manufacturer's minimum and maximum rpm
limits. The power output to supply the pump power demand
must not exceed the continuous rated power of the engine, after
derating for all power consuming engine accessories and adjusting
for installation site altitude and air temperature.
Verify Match Of Pump End To Engine
SAE Bracket Size:
Engine drive pumps are available to fit engines having a standard
SAE 5 through SAE 1 bellhousing and flywheel. For a new engine,
the engine supplier can provide the SAE housing number. For
an existing engine, the bellhousing bore and bolt circle can be
measured and compared against the standard SAE housing
dimensions listed in TABLE 1, to identify the housing SAE number.
• Measure the bellhousing bore (A), and the bolt
circle (B), as accurately as possible with a tape
measure (to the nearest 1/32-inch).
• Count the number of threaded holes in the bell
housing (C). Test the threaded holes with a bolt
to determine the thread series.
• Compare the measured dimensions (A), (B), and (C)
against TABLE 1 to determine the SAE number of
the bellhousing to be sure it matches the SAE
number of your pump.
Bolt Holes
C
No.
mm
in
21.75
12
19.25
12
17.75
12
15.88
12
14.00
8
Diameter
mm
in
11.91
15/32
10.32
13/32
10.32
13/32
10.32
13/32
10.32
13/32
FIGURE 3
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