Ricoh A006 Technical Bulletin FT4460

Technical Bulletin No. RTB-013

SUBJECT: The noise from the exhaust fan motor DATE:March 15’ 92

PAGE: 1 of 1

PREPARED BY: S. Orita
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

We found that the following problem may occur in the field. We would like to inform you
of the troubleshooting in the field.

[ Phenomenon]

The exhaust fan motor (P/N AX020033) may make noise or the fan motor sometimes
cannot rotate.

[Cause]

The bushing in the exhaust fan contains oil-soaked felt. The oil acts as a lubricant
between the fan shaft and the bushing. When the temperature around the fan rises, the
oil may break down and this may cause the shaft and bushing to lock.

[ Solution]

Revision of service manual
Information only
Other

TO: Copier Technical Support Section

MODEL: F11 (FT4460)

To prevent this problem, the felt was removed from the bushing and the material of the
bushing was changed from metal to resin. (Oilless system)

The new resin type bushing (P/N A0065861) is resistered as a service part. The old type
bushing and the new type bushing are interchangeable.
Please install this new bushing in any field machines with the problem.

Exhaust Fan Motor

Bushing (P/N A0065861)