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Clean and disinfect cooling tower with biocides. Systems with biofouling,
high general bacterial counts, or positive cultures of legionella may require
additional cleaning. Refer to “Fluid Cooler Cleaning” section—page 21.
Consult your water treatment expert as to prudent biological evaluation
testing.
GeareducermodelsusedonMHFluidCoolersaredesignedfor5-year
oilchangeintervals.Tomaintainve-yearchangeintervals,useonly
oil designed specifically for these Geareducers. If, after five years,
turbine-typemineraloilisused,theoilmustbechangedsemiannu-
ally. Refer to the Geareducer User Manual for oil recommendations
and further instructions.
Annually: Relubricate motor(s) according to the manufacturer’s instruc-
tions. See instructions on the next page for towers with the motor located
outside the plenum option.
Check to see that all bolts are tight in the fan and mechanical equipment
region, including the fan cylinder and fan guard. Refer to Component User
Manuals for torque values.
Inspect the fluid cooler thoroughly, making maximum use of instructions
given in the separate user manuals. Check structural bolted connections
and tighten as required. Make preventive maintenance repairs as neces-
sary.
Every 5 Years: If equipped, change Geareducer oil. Refer to the Geareducer
User Manual for instructions.
Motor Relubrication Instructions
Motor located outside plenum option. Double-flow models MHF706 and
MHF707 only.
Openandlockoutdisconnectswitchtomakecertainmotorcannot
be started.
1. Remove guard as shown in Figure 4. Opposite end motor bearing is
accessible from outside the tower.
2. Remove grease fill and relief plugs at both shaft extension end and
opposite end bearings and remove hardened grease, using clean
Maintenance
Note
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