Donaldson Torit WSO 20, Installation And Operation Manual

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9
Donaldson Company, Inc.
Blower and Motor (Unpowered WSO 25-2
and 25-3)
The two types of blowers, Torit Backward Incline, TBI,
and Torit Radial Blade, TRB, are installed following the
same procedure. Both can be ordered for top mount.
1. The blower and motor are shipped assembled and
partial disassembly is required before installing.
2. Remove eight motor-mount bracket fasteners;
remove the motor, motor-mount bracket, and blower
wheel as an assembly as shown.
3. Turn housing over and apply sealant to the outside-
edge of the bolt pattern on the blower housing.
Mount the blower housing to the collector using the
inlet cone fasteners.
4. Apply sealant to the outside-edge of the bolt pattern
on the blower housing. Reinstall the motor, bracket,
and blower wheel assembly. Align the tab on the
blower housing with the slot in the motor-mount
bracket.
5. Rotate blower wheel after installation to ensure
proper clearance between the inlet cone and the
blower wheel.
Do not allow the fan wheel to
come loose from the motor as it
may cause severe injury or property damage.
To ensure proper attachment of the fan wheel:
Tighten all setscrews in fan wheel.*
Tighten all setscrews in bearings.*
Repeat after 8 hours of operation.
Repeat again after two weeks of operation.
Reference Wheel Setscrew Torque Table.
Wheel Setscrew Torque
Setscrew Size
Diameter
Carbon Steel Setscrew
Torque*
In. Lb. - In. Lb. - Ft.
1/4 75 6.2
5/16 144 12
3/8 252 21
7/16 396 33
1/2 600 50
5/8 1164 97
3/4 2016 168
7/8 3204 267
1 4800 400
*Stainless steel setscrews are not hardened and should not
be tightened to more than half of the values shown.