26
maintenance
MD5006
through
MD5010
models’ fan motors are oriented with the shaft up.
The motor may be hoisted by threading an eye bolt into the motor shaft and
lifting with a hoist. To remove the motor fastener hardware, lift on the motor
slightly with the hoist to remove the weight from the fasteners, then loosen
and remove motor fasteners.
On
MD5016
through
MD5018
models, the fan motor is located inside the
plenum of the cooling tower. The motor can be accessed through the mechani-
cal access panel. See the
Access Door Operatio
n section for instruction on
opening the access panel. Remove the drive belt by following the instructions
in the
Belt Tensioning
section.
Motor inside plenum models are equipped with either a hinged or sliding
motor plate. For hinged motor plate models, loosen the motor mount system
retaining bolts shown in the image. It is not necessary to loosen any hard-
ware other than what is indicated. Hinge the motor mounting system 90° out
through the access panel. Attach a hoist to the motor with straps or chains.
Lift on the motor slightly with the hoist to remove the weight from the motor
fasteners, then loosen and remove motor fasteners.
Hoisting attachment locations vary by motor - choose strap or chain
attachment locations carefully to provide a balanced lift.
For sliding motor plate models, the motor may be hoisted out through the fan
cylinder opening. Turn the adjustment rod(s) counterclockwise to slide the
motor toward the interior of the cooling tower. Remove the portion of the fan
guard nearest the motor location. It may be necessary to de-pitch or remove
one or more fan blades —consult the fan manual accompanying the cooling
tower. Attach a hoist to the motor with straps or chains. Lift on the motor
Caution
MOTOR MOUNT
RETAINING BOLTS
ACCESS PANEL
OPENING
INSIDE VIEW
HINGE
HARDWARE
JACKING SCREW
