NBE Brawn mixer BTO Series, Operation And Maintenance Manual

Page: 9 / 40

BTO-S
ERIES
O
PERATION
& M
AINTENANCE
M
ANUAL
12838 Stainless Drive, Holland, MI 49424 Phone: 616/399-5600 Fax 616/399-3084
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Copyright 2018 BRAWN Mixer www.BRAWNMIXER.com Page 3 of 9
11/27/2018
INSTALLATION, Cont.
3. Couple the mixer shaft to the gear drive output shaft
coupling and secure with the hardware provided.
Torque as recommended in
TABLE 1 . Refer to
precautions under the Shaft and Impeller
Assembly section.
4. Install impeller(s) on lower shaft (refer to
Shaft and
Impeller Assembly section).
TABLE 1: RECOMMENDED TORQUE VALUES
HARDWARE
SIZE
TORQUE VALUES (FOOT POUNDS)
STANDARD GRADE 2
& 300 SERIES
STAINLESS
HIGH STRENGTH
GRADES 5 & 8
3/8-16 17 27
7/16-14 27 40
1/2-13 40 65
9/16-12 65 90
5/8-11 85 125
3/4-10 135 225
7/8-9 145 365
1-8 210 545
BOLT-TIGHTENING RECOMMENDATIONS:
Inadequately or improperly tightened hardware can
loosen due to vibration during mixer operation. This can
result in reduced mixer life or damage to equipment.
Recommended torque values for tightening all in-tank
and mounting hardware are listed in
TABLE 1 . These
average torque values should be considered only as a
guide and not as absolute values.
SHAFT & IMPELLER ASSEMBLY
To install the impeller on the shaft, slide the impeller hub
over the mixer shaft, place the hook key in position,
lower the hub over the hook key and tighten the set
screw. The set screw must seat in the countersunk hole
in the hook key. Proper impeller mounting is illustrated in
FIGURE 1 . If an axial flow impeller of bolt-together
construction is used, blades should be bolted to the
bottom of the impeller hub ears as shown in
FIGURE 2 .
FIGURE 1: IMPELLER MOUNT WITH HOOK KEY
FIGURE 2: TYPICAL AXIAL FLOW
IMPELLER ASSEMBLY (A45 SHOWN)
START UP
1. All units are lubricated before shipment. The
lubricant level should be checked with the unit
mounted in its correct operating position. Lubricant
should be added or removed to bring it to the correct
level. The catalog for the gear unit shows the oil level
for various mounting positions.