Shimano BR-IM86-F, BR-IM85-F Service Instructions

SI-8JL0A-003-00

General Safety Information

WARNING

– To avoid serious injuries:

It is important to completely understand the operation of ● your bicycle’s brake system. Improper use of your bicycle’s brake system may result in a loss of control or an accident, which could lead to severe injury. Because each bicycle may handle differently, be sure to learn the proper braking technique (including brake lever pressure and bicycle control characteristics) and operation of your bicycle. This can be done by consulting your professional bicycle dealer and the bicycle’s owners manual, and by practicing your riding and braking technique.

If the front brake is applied too strongly, the wheel may lock

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and the bicycle may fall forward, and serious injury may result.

The hub of the Shimano front Inter-M brake has a built-in

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power modulator. This system controls the braking force so that excessive force is not applied if the braking force reaches the speciﬁ ed value. If the hub is not equipped with the power modulator, the braking force may be excessively applied. For this reason, we recommend using the Shimano front Inter-M brake and the hub as a set. Noise is generated by the operation of the power modulator when the brake is applied, but this is not a sign of a malfunction.

If using the BR-IM86-F/BR-IM85-F in combination with a

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suspension fork, care must be taken when selecting the suspension fork to use. Please consult with the shop or the bicycle manufacturer. If an incorrect type of suspension fork is selected, it could prevent the suspension fork from functioning properly because of overheating during braking or lack of strength in the fork, which could result in an accident.

The SB-8S20/ST-8S20/SB-7S45/BL-IM60/BL-IM65/

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BL-IM45 brake levers are equipped with a mode switching mechanism. Be sure to use the BR-IM86-F, BR-IM85-F with the mechanism in the C.R. mode position.

C.R mode position

The C indicates the mode position for compatibility with cantilever brakes. The R indicates the mode position for compatibility with roller brakes.

Obtain and read the service instructions carefully prior to

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installing the parts. Loose, worn, or damaged parts may cause serious injury to the rider. We strongly recommend only using genuine Shimano replacement parts. Always make sure that the front and rear brakes are working

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correctly before you ride the bicycle. If the road surface is wet, the tires will skid more easily.

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If the tires skid, you may fall off the bicycle. To avoid this, reduce your speed and apply the brakes early and gently. Read these Technical Service Instructions carefully, and

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keep them in a safe place for later reference.

CAUTION

– To avoid serious injuries:

When using the Shimano Inter-M brake system, avoid

continuous application of the brakes when riding down long slopes, as this will cause the internal brake parts to become very hot, and this may weaken braking performance. It may also cause a reduction in the amount of brake grease inside the brake, and this can lead to problems such as abnormally sudden braking. The design of the Shimano Inter-M brake system has been carried out based on standards such as ISO 4210 and DIN 79100-2. These standards specify the performance for an overall weight of 100 kg. However, BR-IM86-F is designed with the overall weight assumed to be 130kg. If the overall weight exceeds 100 kg (130kg for BR-IM86-F), the braking force provided by the system may be insufﬁ cient for correct braking, and durability of the system may also be reduced.

The front Inter-M brake system should only be installed to

the left side of a bicycle which is 26” or larger. If it is used on a bicycle which is smaller than 26”, the braking force may be too great, which could cause accidents.

In order to get the best performance from the Shimano

front Inter-M brake, be sure to use Shimano brakes cables and brake levers as a set. (Refer to the product line-up.)

The amount of movement of the inner cable must be

14.5 mm or more when the brake lever is depressed. If it is less than 14.5 mm, braking performance will suffer, and the brakes may fail to work.

Check that the front brake unit is ﬁ rmly secured to the hub

with the brake unit ﬁ xing nut.

Check that the hub axle is touching the back of the fork

end and the wheel is ﬁ rmly secured to the frame with the quick release or the hub nut. If the wheel is not installed properly, it may come off the frame, which could result in a serious accident when riding.

If any of the following occur while using the brakes, stop

riding immediately and ask the place of purchase to carry out inspection and repairs.

1) If abnormal noise is heard when the brakes are applied

2) If braking force is abnormally strong

3) If braking force is abnormally weak

In the case of 1) and 2), the cause might be not enough brake grease, so ask the place of purchase to grease the mechanism with special roller brake grease. Before applying grease, remove the grease hole cap and press-ﬁ t the tube into the back of the hole. Apply an appropriate amount of grease (approx. 5g) while turning the wheel slowly. After application, check that braking is properly applied and that no abnormal noise is heard.

Grease hole cap

Grease for roller brake

Turn slowly.

If the brakes are used

frequently, the components around the brake may become hot. Do not touch the components for at least 30 minutes after you ﬁ nish riding the bicycle.

If the brake cable becomes rusted, braking performance

will suffer. If this happens, replace the brake cable with a genuine Shimano brake cable and re-check the braking performance.

The BR-IM86-F/BR-IM85-F front brake units, and HB-

IM70, DH-2R35-E-H/DH-3R35-H front hub units should never be disassembled. If they are disassembled, it will no longer work properly.

12 mm or more

Components around the brake

NOTE:

Use a wheel with 3x or 4x spoke lacing. Wheels with radial ● lacing cannot be used because the spokes and the wheel can be damaged when applying the brakes and brake noise can be generated.

The front Inter-M brake is different from conventional band

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brakes in that the inside of the brake drum is ﬁ lled with grease. This may cause the turning of the wheel to be slightly heavier than usual, particularly in cold weather.

If you apply the front Inter-M brake strongly while the bicycle

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is stopped and then shake the wheel, you will notice that there is a small amount of play in the brakes. This is normal, and will not cause any problems at all while riding.

To check the amount of

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looseness in the head parts, grasp the middle of the handlebar and one of the front forks as shown in the illustration, and then move the head parts back and forth in the directions indicated by the arrows. Moreover, because the brakes give a small amount of play if you apply the brakes fully and shake the wheel as described above, this will make it more difﬁ cult to check the looseness in the head parts.

Parts are not guaranteed against natural wear or

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deterioration resulting from normal use. For maximum performance we highly recommend Shimano ●

lubricants and maintenance products. For any questions regarding methods of handling or

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adjustment, please contact the place of purchase.

SI-8JL0A-003

BR-IM86-F

Inter-M Brake

BR-IM85-F

Technical Service Instructions

In order to realize the best performance from the Shimano front Inter-M brake system, we recommend that the following combination be used.

Brake BR-IM86-F/BR-IM85-F

Hub HB-IM70/DH-2R35-E-H/DH-3R35-H

Lever

Brake cable

Installation of the brake to the frame

Install the adapter to the front fork so that the thread

hole of the adapter side is facing upward, as shown in the ﬁ gure.

Tightening torque: 6 – 8 N·m {52 – 70 in. lbs.}

5 mm Allen key

Fixing bolt

Place the drop prevention rings onto the ﬁ xing bolts.

The projections of the drop prevention rings should be touching against the front fork at this time.

Drop prevention ring

Touching

Check that the front brake unit is ﬁ rmly secured to the

hub body with the brake unit ﬁ xing nut.

Brake unit fixing nut

In case of the quick release type: With rollets Surface with rollets should be facing outward. In case of the hub nut type: without rollets

Tightening torque: 15 – 20 N·m {131 – 174 in. lbs.}

SB-8S20/ST-8S20 SB-7S45/BL-IM60

BL-IM65/BL-IM45

Brake unit

Adapter

Thread hole of adapter side

Place the wheel with the front brake unit installed into

the fork end as far as it will go, and turn the brake arm so that it is touching the adapter. Then set it securely with the quick release or the hub nut.

Touching

Hub axle

In case of the quick release type: Secure the cam lever of the quick release firmly.

Tightening torque: 5 – 7.5 N·m {44 – 65 in. lbs.}

In case of the nut type:

Hub nut

Tightening torque: 20 – 25 N·m {174 – 218 in. lbs.}

Secure the brake arm with the ﬁ xing bolt and press-ﬁ t

the drop-prevention ring. Next, touch the protruding section of the drop prevention ring to the adapter.

Adapter

Fixing bolt

Touching

Drop prevention ring

Tightening torque: 6 – 8 N·m {52 – 70 in. lbs.}

Installing the brake cable

After checking that the adjusting bolt and adjusting nut

are fully tightened, insert the outer casing holder unit into the inner cable in the direction shown below.

Adjusting nut

Adjusting bolt

After checking that the stamp of the back side of the

inner cable ﬁ xing bolt unit is “F”, pass the inner cable through the hole of the inner cable ﬁ xing bolt unit.

Inner cable fixing bolt unit

Outer casing holder unit

Stamp "F"

Brake arm

5 mm Allen key

Place the components as shown in the following ﬁ gure

and tighten the inner cable ﬁ xing nut. At this time, if the TL-IM21 is used, it will be possible to mount the inner cable ﬁ xing bolt unit easily.

101 mm

Tightening torque: 6 – 8 N·m {52 – 70 in. lbs.}

Align the red mark on the inner cable ﬁ xing washer so

that it faces in the direction of the groove in the winder unit, and then insert the inner cable ﬁ xing bolt unit and push it into the groove in the winder unit as far as it will go.

Groove in winder unit

Inner cable fixing bolt unit

Insert the inner cable fixing bolt unit into the groove in the winder unit as far as it will go.

Route the inner cable along the groove of the winder

unit.

Groove of winder unit Inner cable

Hook the inner cable over the cable hook.

Insert the outer casing holder unit into the hole of the

brake arm from underneath and slide it to the lower section of the hole.

Outer casing holder unit

After checking that the outer casing holder unit is

securely inserted into the back of the brake arm hole, attach the inner end cap. Then, set the inner end cap so that it does not touch the ﬁ n or the spokes.

Inner end cap

Inner cable fixing nut

Red mark on inner cable fixing washer

Inner cable

Cable hook

Brake arm

Outer casing holder unit

Turn the cable adjusting bolt to tighten the inner cable.

Cable adjusting bolt

Installation of the brake cable can be completed by the above procedure. When detaching the cable, perform in reverse order.

Adjusting the brake cable

After checking that the wheel does not easily turn

while the brake cable is being pulled, depress the brake lever about 10 times as far as the grip in order to run in the brake cable.

Depress about 10 times

Note:

If the brake cable is not run in, it will need to be adjusted again after only a short period of use.

Turn the cable adjusting bolt of the brake unit or brake

lever so that there is about 15 mm of play in the brake lever.

The amount of brake lever play is the distance from the position where the brake lever is not operated to the position where a force is felt suddenly when the brake lever is pulled.

Cable adjusting bolt

15 mm of play

Cable adjusting bolt

After depressing the brake lever to check the braking

performance, secure the cable adjusting bolt with the cable adjusting nut.

Tightening torque: 1 – 2 N·m {9 – 17 in. lbs.}

Cable adjusting nut

These service instructions explain how to use and maintain the Shimano bicycle parts which have been used on your new bic ycle. 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.

One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003

Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222

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

* Service Instructions in further languages are available at :

http://techdocs.shimano.com

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