Inspection
Inspection of the fan should be conducted in the first
30 minutes
,
8 hour
and
24 hour
intervals of satisfactory operation. During
the inspections, stop the fan and inspect as per the
Conditions Chart
.
30 Minute Interval
Inspect bolts, setscrews, and motor mounting bolts. Adjust and tighten as necessary.
8 Hour Interval
Inspect belt alignment and tension. Adjust and tighten as necessary.
24 Hour Interval
Inspect belt tension, bolts, setscrews, and motor mounting bolts. Adjust and tighten as necessary.
Maintenance
Establish a schedule for inspecting all parts of the fan. The frequency of inspection depends on the operating conditions and
location of the fan.
Inspect fans exhausting corrosive or contaminated air within the first month of operation. Fans exhausting contaminated air
(airborne particles) should be inspected every three months, or sooner. Regular inspections are recommended for fans
exhausting non-contaminated air.
It is recommended the following inspection be conducted twice per year.
•
Inspect bolts and setscrews for tightness. Tighten as necessary. Worn setscrews should be replaced immediately.
•
Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. See Belt and
Pulley Installation on page. 5.
•
Bearings should be inspected as recommended in the conditions chart.
Conditions Chart
RPM
Temperature
Fan Status
Greasing Interval
100
Up to 120ºF
Clean
6 to 12 months
500
Up to 150ºF
Clean
2 to 6 months
1000
Up to 210ºF
Clean
2 weeks to 2 months
1500 Over
210ºF
Clean
Weekly
Any Speed
Up to 150ºF
Dirty
1 week to 1 month
Any Speed
Over 150ºF
Dirty
Daily to 2 weeks
Any Speed
Any Temperature
Very Dirty
Daily to 2 weeks
Any Speed
Any Temperature
Extreme Conditions
Daily to 2 weeks
•
Inspect springs and rubber isolators for deterioration and replace as needed.
•
Inspect for cleanliness. Clean exterior surfaces only. Removing dust and grease on motor housing assures proper
motor cooling. Removing dirt from the wheel and housing prevents imbalance and damage.
Lubricants
M.K. Plastics
uses petroleum lubricant in a lithium base. Other types should not be used unless the bearings and lines have
been flushed clean. If another type of grease is used, it should be lithium-based grease conforming to NLGI grade 2
consistency.
A NLGI grade 2 grease is a light viscosity, low-torque, rust inhibiting lubricant that is water resistant. Its temperature range is
from –30ºF to +200ºF and capable of intermittent highs of +250ºF.
Motor Bearings
Motor bearings are pre-lubricated and sealed. Under normal conditions they will not require further maintenance for a period of
10 years. However, it is advisable to have your maintenance department remove and disassemble the motor, and lubricate the
bearings after 3 years of operation in excessive heat and or in a contaminated air stream consisting of airborne particles.
Fan Bearings
Greasable fan bearings are lubricated through a grease fitting on the bearing and should be lubricated by the schedule,
Conditions Chart.
For best results, lubricate the bearings while the fan is in operation. Pump grease in slowly until a slight bead forms around the
bearing seals. Excessive grease can burst seals resulting in high operating temperatures, thus reducing bearing life.
In the event the bearing cannot be seen, use no more than three injections with a hand-operated grease gun.
Motor Service
Should the motor prove defective within one-year period, contact
M.K. Plastics
directly, or your nearest motor service
representative.
8
