Ricoh A006 Technical Bulletin FT4460
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Technical Bulletin |
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No. RTB-013 |
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SUBJECT: The noise from the exhaust fan motor |
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DATE:March 15’ 92 |
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PAGE: 1 of 1 |
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PREPARED BY: S. Orita |
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TO: Copier Technical Support Section |
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CHECKED BY: |
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CLASSIFICATION: |
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MODEL: F11 (FT4460) |
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Action Required |
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Revision of service manual |
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Troubleshooting |
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Information only |
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Retrofit Information |
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Other |
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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]
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)
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