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Maintenance
Greenheck recommends these procedures to insure trouble free operation of this unit. Most unit failures can be
attributed to poor setup or poor maintenance.
A record of maintenance performed on this unit should be kept. This information will provide essential information
if problems are encountered. A section at the back of this manual is provided for recording the unit's maintenance
history.
CAUTION: When performing any maintenance on this
unit be sure that the power is disconnected and cannot
be accidently turned on. The control center disconnect
can be locked in the off position .
2 weeks after startup
Check belt tension - Belts tend to stretch after a period of
time. They should be periodically checked for wear and
tightness. Approximately
3
/8" of deflection per ft. of span
between sheaves is standard for belt tightness. When
replacing belts, use the same type as supplied with the unit.
Matched belts should always be used on units with
multigroove pulleys.
Replacement of belts - should be accomplished by loosening the tensioning device to the point where the belts
can be removed by hand. Do not force belts on or off as this may cause breakage of cords leading to premature
belt failure. Belts should be adjusted as shown above.
Every 3 Months
The filter in the unit should be inspected at least every 3 months. Depending on the environment filters could
require changing or cleaning more or less often. The filters can be slid out of either side of the unit.
If washable filters are installed, they can be washed in warm soapy water. An adhesive spray can be applied to
increase filter efficiency.
If disposable filters are installed, check by holding up to a light source. If light cannot pass through the filter, it
should be replaced. Replacement filters should be of the same manufacturer and size.
When reinstalling filters, be sure to install with the airflow in the correct direction indicated on the filter and with
any factory spacers that came with the unit.
Yearly
All bearings on units 108 to 118 are permanently lubricated and require no further lubrication under normal use.
Normal use being considered -20°F to 120°F and in a relatively clean environment. Units from sizes 120 to 220
should be checked monthly for lubrication.
Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited
to the exterior surfaces only. Removing dust and grease buildup on motor housing assures proper motor cooling.
Greasing of motors is intended only when grease fittings are provided. Many fractional motors are permanently
lubricated and require no further lubrication. Motors supplied with grease fittings should be greased in
accordance with manufacturer's recommendations. When motor temperature does not exceed 104°F (40°C), the
grease should be replaced after 2000 hours of running time as a general rule.
Wheels require very little attention when moving clean air. Occasionally oil and dust may accumulate on the wheel
causing imbalance. When this occurs the wheel and housing should be cleaned to assure smooth and safe
operation.
Routinely check all fasteners for tightness.
Belt Tension
Adjustment
Screw
Blower
Housing
Motor
Too Loose
Too Tight
R
o
t
a
t
i
o
n
NOTE: For motors of 1 HP or less a smaller sliding base
bracket is used to attach to blower.