Greenheck DGX Installation, Operation And Maintenance Manual page 39

Motors
Motor maintenance is generally limited to cleaning
and lubrication (where applicable).
Cleaning should be limited to exterior surfaces only.
Removing dust and grease build-up on the motor
assures proper motor cooling.
Motors supplied with grease fittings should be
greased in accordance with the manufacturer's
recommendations.
Wheels
Wheels require 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
proper operation.
Bearings
The bearings for Greenheck fans are carefully
selected to match the maximum load and operating
conditions of the specific class, arrangement and fan
size. The instructions provided in this manual and
those provided by the bearing manufacturer will
minimize any bearing problems.
Recommended Bearing Lubrication Schedule for Greenheck Fans
Fan RPM
250
500
750
1000
1250
1500
2000
* Suggested initial greasing interval is based on 12 hour per day operation and 150°F maximum
housing temperature. For continuous (24 hour) operation, decrease greasing interval by 50%
- If extended grease lines are present, relubricate while in operation, only without endangering
personnel.
- For ball bearings (operating) relubricate until clean grease is seen purging at the seals. Be sure
not to unseat the seal by over lubricating.
- For ball bearings (idle) add 1-2 shots of grease up to 2 inch bore size, and 4-5 shots above 2 inch
bore sizes with a hand grease gun.
- For roller bearings add 4 shots of grease up to 2 inch bore size, and 8 shots for 2 inch - 5 inch
bore size with a hand grease gun.
- Adjust relubrication frequency based on condition of purged grease.
- A high quality lithium based grease conforming to NLGI Grade 2 consistency, such as those listed
below.
Mobil 532
Mobilux #2
Maintenance - Routine
Relubrication Schedule in Months*
Bearing Bore Size (inches)
1/2 - 1 1 1/8 - 1 1/2
6 6
6 6
6 5
5 3
5 3
5 2
5 1
Texaco Multifak #2
Texaco Premium #2
39
IMPORTANT!
Do not allow water or solvents to enter the motor
or bearings. Motors and bearings should never
be sprayed with steam, water or solvents.
IMPORTANT!
Greasing motors is only intended when fittings
are provided. Many motors are permanently
lubricated, requiring no additional lubrication.
IMPORTANT!
Lubricate bearings prior to periods of extended
shutdowns or storage and rotate shaft monthly
to aid in corrosion prevention. If the fan is
stored more than three months, purge the
bearings with new grease prior to start-up.
1 5/8 - 1 7/8 1 15/16 - 2 3/16
6 6
6 5
4 3
2 1
2 1
1 1
1 0.5
B Shell Alavania #2
Exxon Unirex N2
2 7/16 - 3
6
4
3
1
1
0.5
0.25