25
Sheave Assembly Bolt Torque
Busing Type
ft·lb
ƒ
N·m
SD
5
10
SK
15
20
SF
25
30
E
35
50
maintenance
each other and level within
1
⁄
2
° (
1
⁄
8
" in 12") in order to not adversely affect
belt and sheave life.
• Alignment can be achieved by placing a straight edge across the top of
the sheaves making sure that it is level and measuring down to the bottom
surface of both sheaves at four points. See photo.
• The number of grooves on the motor and fan sheaves may not match
each other, or the number of grooves on the belt. Always install the belts
on the highest grooves on the fan sheave. Doing so will reduce the force
on the fan shaft bearings, thus increasing their life.
Fan Motor Access and Removal:
Always shut off electrical power to the tower fan motor prior to
performing any inspections that may involve physical contact with
the mechanical or electrical equipment in or on the tower. Lock out
and tag out any electrical switches to prevent others from turning
the power back on. Service personnel must wear proper personal
protective clothing and equipment.
The MD fan motors are located inside or
outside the cooling tower, depending on
the model. On
MD5006
through
MD5010
models, the fan motor is located outside the
cooling tower. The motor is fully accessed
by removing the motor protection hood.
Remove motor protection hood and the
drive belt by following the instructions in
the
Belt Tensioning
section.
Warning
