124 CLCH-SVX07C-EN
Routine Maintenance
Refer to Tabl e 37 for minimum torque of motor mounting and bearings bolts.
Motor Bearing Lubrication
Obtain an IOM from the motor manufacturer for the specific motor installed. The motor
manufacturer’s recommendations take precedence for all matters related to the start-up and
routine maintenance of the motor.
Motor grease fittings have been removed from factory-installed motors in compliance with UL
regulations. Motor bearings require periodic maintenance throughout their life. Many different
styles of motors come as standard selections, so please obtain the motor IOM and use the
manufacturer-recommended grease.
Fan Motor Inspection
Inspect fan motors periodically for excessive vibration or temperature.
Coils
All coils should be kept clean to maintain maximum performance.
Steam and Water Coils
WARNING
Hazardous Chemicals!
Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper
handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as
required. For personal safety refer to the cleaning agent manufacturer’s Materials Safety Data
Sheet and follow all recommended safe handling practices. Failure to follow all safety
instructions could result in death or serious injury.
Table 37. Minimum hex head bolt torque in lb.-ft. (Grade 5 bolts)
Size (inches) Thread Designation Minimum Torque
1/4-20 UNC 6
1/4-28 UNF 7
65/16-18 UNC 14
5/16-24 UNF 16
3/8-16 UNC 24
3/8-24 UNF 28
7/16-14 UNC 42
7/16-20 UNF 45
1/2-13 UNC 69
1/2-20 UNF 83
9/16-12 UNC 99
9/16-18 UNF 118
5/8-11 UNC 150
5/8-18 UNF 176
3/4-10 UNC 254
3/4-16 UNF 301
7/8-9 UNC 358
7/8-14 UNF 422
1-8 UNC 500
1-14 UNF 602
Note: Soft metric conversions are not acceptable for screw and hex sizes.
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