GSI Group PNEG-377, Service Manual

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Fan and Heater
Motors used in GSI fan units are all standard
NEMA frame motors and are specially designed for
use in crop drying applications. Most of the replace-
ment parts for these motors are handled by authorized
service stations of the various motor manufacturers.
1. Always disconnect and lock out power before
working on or around fan motor and electrical
components.
2. Malfunctioning electrical components
should be checked by a qualified electrician.
3. For extra motor life, any electric motor
should be run for 30 minutes, once a month.
This will help eliminate any damaging mois-
a. Fans setting idle in the summer offer an
excellent place for mud dobbers to build
their nests. A mud dobber nest on the
back of the fan blade will cause the fan
to be out of balance and vibrate.
b. Also, mice have been known to nest in
the back of a blade. When the fan is
started the centrifugal force kills the mice,
but throws the blade out of balance.
Lubrication
This is a ball bearing motor.
The bearings have been
given initial lubrication at the
factory. Motors without
regreasing capability are fac-
tory lubricated for normal
bearing life.
Relubrication
Intervals
(Motors with Regreasing
Capability)
New motors having been in stor-
age for over a year should be
Hours of
Service Per Year
5000 Hrs.
Continuous Normal Application
Seasonal Service Motor is idle
for 6 months or more
Continuous high ambients, dirty
or moist locations, high
vibration or where shaft end is
hot (pumps-fans)
254 to 326T
3 years
1 years
1 year
(beginning of
season)
6 months
Suggested Relube Interval
NEMAFRAME SIZE
42 to 215T
5 years
2 years
1 year
(beginning of
season)
6 months
364 to 447T
1 years
9 months
1 year
(beginning of
season)
3 months
Lubricant
Baldor motors are pre-greased normally with
Shell Oil Company's "Dolium R". Several equiva-
lent greases which are compatible with the Baldor
Procedure
fitting, clean tip of fitting and apply grease gun.
Use 1 to 2 full strokes on motors in NEMA 215
frame and smaller. Use 2 to 3 strokes on NEMA
Overgreasing bearings can cause premature bear-
ing failure. If motor is equipped with Alemite
furnished grease are Chevron Oil's "SRI No. 2"
and Texaco Inc.'s "Premium RB".
relubricated by the procedure noted in the chart to
ensure long operating life.
Insert 2 to 3 inch length of grease string into each
hole on motors in NMEA 215 frame and smaller.
Insert 3 to 5 inch length on larger motors. Motors
having grease drain plugs, remove plug and operate
motor for 20 minutes before replacing drain plug.
Keep grease clean. Lubricate motors at stand-
still. Remove and replace drain plugs at stand-
still. Do not mix petroleum grease and silicone
grease in motor bearings.
254 thru NEMA 365 frame. Use 3 to 4 strokes on
NEMA 404 frames and larger. On motors having
drain plugs, remove grease drain plug and oper-
ate motor for 20 minutes before replacing drain
plug.
On motors equipped with slotted head grease
screw, remove screw and apply grease tube to hole.
FAN SERVICE
ture build-up in the motor and bearings.
4. If excess vibration shows up at some point
when the fan has been running smoothly,
check the blade for these conditions: