Shimano DH-3NB1, DH-3RB1 Service Instructions

General Safety Information

NOTE:

Carefully read the Service Instructions for CYBER NEXUS.

Carefully read the Front Inter-M Brake System Service Instructions for roller brakes in
conjunction with these Service Instructions when using the hub DH-3RB1 for roller
brakes.

Use a 6 V/ 2.4 W bulb for the front lamp and a 6 V/ 0.6 W bulb for the taillamp.

SI-2ZX0A

Removing and installing the front wheel

When removing the bicycle wheel, first remove the connector. If the cables are pulled strongly, it
may break the cable wires or cause poor contacts. Furthermore, when installing the wheel, first
secure the wheel to the front forks and then connect the connector.

Connector

Connect

Cable

Front fork

DH-3RB1

Hub Dynamo

DH-3NB1

Technical Service Instructions

Installation of the front wheel

Install the wheel so that the side with the hub dynamo connection terminal is on the
right side when looking toward the front of the bicycle, and so that the hub connection
terminal is aligned with the front fork or with the basket stay.
Then install by following the procedure shown in the illustration below so that the
connection terminal is facing upward. Do not force the connection terminal to turn after
the quick release lever has been secured.

Front fork

Mudguard stay

Quick release nut

Volute spring

Note:

The toothed axle washer is not necessary for
a quick release type.

Connection terminal

Front fork

Connection
terminal

Checking the lamp illumination

Before riding at night, rotate the front wheel and check that the lamp illuminates.

These service instructions explain how to use and maintain the Shimano bicycle parts which have been
used on your new bicycle. For any questions regarding your bicycle or other matters which are not related to
Shimano parts‚ please contact the place of purchase or the bicycle manufacturer.

Please note: Specifications are subject to change for improvement without notice. (English)

®

Connect the two wires to ensure that the
current flows smoothly.

Mudguard stay

Quick release nut

One Holland, Irvine, California 92618, U.S.A. Phone: [phone]

Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: [phone]

3-77 Oimatsu-cho, Sakai, Osaka 590-8577, Japan

C

Nov. 2003 by Shimano Inc. PIT. SZK. Printed in Singapore