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7
Figure 7
141
102
143
142
300
145
142
146
144
142
Hub Cover Installation
Install the hub cover as shown in Figure 1 and Figure 7. Tighten all
hex nuts to 15 ft·lb
ƒ
(20 N·m) torque.
Fan Maintenance
Preventative maintenance will prolong useful life and assure con-
tinued trouble-free operation. After the rst week and subsequently
at six month intervals:
• Torque all hardware to specications referenced in this manual.
• Visually inspect the fan for airborne debris damage, contact with
fan cylinder segments, and corrosive attack. Correct any situations
determined detrimental to fan operation.
• Remove any accumulated scale or dirt.
• Clear blade drain holes.
Service
Proper identication of your fan is necessary to insure you receive
correct replacement parts. The Marley cooling tower serial number
can be used to determine the fan and any components installed and
maintained as original equipment on a Marley cooling tower. The fan
diameter and moment weight class from the blade nameplate (see
Figure 3) is required to identify blades for replacement. The fan hub
➠