Scotsman MFE400 - Manual (Page 23)

SUBJECT: Small Flaker Coupling Noise
The correct diagnosis of any service problem is critical to making a correct repair. When small flakers (those
using the
1
⁄
10 H.P. gearmotor - models such as AF1, AF325, FD470, and MF400) produce a "clicking" or
"snapping" sound, one of the most likely possible problems is mis-alignment between the auger shaft and the
gearmotor output shaft. The sound is produced by the motion of the coupling between the two shafts because
of the mis-alignment. The noise may
seem to come from the evaporator. Another clue is finding aluminum
"dust" from the coupling on the gearcase cover.
A quick test is to spray some lubricant on the auger shaft at the top of the coupling. If the noise stops,
mis-alignment is the problem. The proper repair is to replace the following parts:
1. The coupling, part number A29915-002. Be sure to grease it when re-assembling.
2. The adapter, part number 08-0595-01.
3. Gaskets, part numbers 13-0628-00 and 02-1505-00.
3. The gearmotor cover, part number A28165-021. Check the oil and gears when the gearmotor is apart.
4. Also check the splines of the auger, they may have become damaged and then the auger must be replaced
also.
Scotsman is now shipping replacement gearmotors with the adapter included to insure that this critical part is
changed.
SERVICE BULLETIN
PS-5-93
July, 1993