www.DaikinApplied.com 41 IM 915-13 • VISION - EXTENDED SIZES
Service and Maintenance
Periodic Service and Maintenance
1. Check all moving parts for wear every six months.
2. Check bearing collar, sheave, and wheel hub setscrews,
sheave capscrews, and bearing hold-down bolts for
tightness every six months.
3. Annually check and snug all electrical connections.
Inspect for signs of water damage such as corrosion
and repair if necessary. Check ground conductor and
connection integrity and correct if needed.
Bearing overheating potential. Can damage the equipment.
Do not over-lubricate bearings. Use only a high grade mineral
grease with a 200°F safe operating temperature. See below
for specic recommended lubricants.
Motor Bearings
Supply and return fans—Supply and return fan motors should
have grease added after every 2000 hours of operation. Using
the following procedure, re-lubricate the bearings while the
motor is warm, but not running. Use one of the greases shown
in Table 23.
Direct Drive Class II fans that are supplied with TECO
motors have double shielded bearings on frame sizes
140T-280T. These bearings are pre-packed with a long
life grease and are not re-greaseable. Larger frame
size TECO motors are re-greaseable and follow the
same lubrication recommendations as all other motors.
1. Remove and clean upper and lower grease plugs.
2. Insert a grease tting into the upper hole and add clean
grease (Table 23) with a low pressure gun.
3. Run the motor for ve minutes before replacing the plugs.
Specic greasing instructions are located on a
tag attached to the motor. If special lubrication
instructions are on the motor, they supersede all other
instructions.
Table 23: Recommended Lubricants and Amounts for Fan
Motor Bearings
Mfr. Grease
Amount to Add
(oz.)
Texaco, Polystar
or
Polyrex EM (Exxon Mobil)
or
Rykon Premium #2
or
Penzoil Pen 2 Lube
56 to 140 0.08
140 0.15
180 0.19
210 0.30
250 0.47
280 0.61
320 0.76
360 0.81
400 1.25
440 2.12
Fan Shaft Bearings
For safety, stop rotating equipment. Add one half of the
recommended amount shown in Table 25. Start bearing, and
run for a few minutes. Stop bearing and add the second half
of the recommended amount. A temperature rise, sometimes
30°F (1°C), after re-lubrication is normal. Bearing should
operate at temperature less than 200°F (94°C) and should
not exceed 225 (107°C) for intermittent operation. For a re-
lubrication schedule, see Table 24. For any applications that
are not in the ranges of the table, contact Daikin Applied.
The tables in this section state general lubrication
recommendations based on our experience and are intended
as suggested or starting points only. For best results, specic
applications should be monitored regularly and lubrication
intervals and amounts adjusted accordingly.
Any good quality lithium or lithium complex base grease, using
mineral oil, conforming to NLGI grade 2 consistency, and an oil
viscosity of 455-1135 SUS at 100°F (100-200 cSt at 40°C) may
be used for re-lubrication.
Compatibility of grease is critical. Re-lubricatable bearings are
supplied with grease ttings or zerks for ease of lubrication with
hand or automatic grease guns. Always wipe the tting and
grease nozzle clean.
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