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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: specifications are subject to change for improvement without notice. (English)
© May 2009 by Shimano Inc. XBC IZM Printed in Malaysia.
Technical Service Instructions SI-0061A-002
Adding mineral oil and
bleeding air
7. With the brake lever depressed, open and close the bleed nipple in rapid succession (for
approximately 0.5 seconds each time) to release any air bubbles which may be in the
calipers. Repeat this procedure about 2 to 3 times. Then tighten the bleed nipple again.
9. Tilt the brake lever backward at an angle of 30 degrees,
and then repeat step 8 and check that no air remains.
Next, tilt the brake lever forward at an angle of 30 degrees,
and then repeat step 8 and check that no air remains.
Repeat these steps until bubbles stop appearing.
10. Plug the oil funnel with the oil stopper so that the oil
inside the oil funnel cannot come out, and then remove
the oil funnel and retighten the bleed screw. In addition,
tighten the bleed screw until oil flows out to make sure
that there are no air bubbles remaining inside the
reservoir tank.
* Do not operate the brake lever at this time, otherwise air
may get inside the cylinder.
An oil funnel and an oil stopper will be required
when bleeding the air.
Bleed screw
Oil funnel
Oil stopper
2. Attach a 7 mm socket wrench, and fill the syringe with oil and connect a hose
to the bleed nipple. Then loosen the bleed nipple by 1/8 of a turn to open it.
Push the plunger of the syringe to add oil. The oil will start coming out from
the oil funnel. Continue adding oil until
there is no more air mixed in with the
oil that is coming out.
3. Once air stops coming out, temporarily close the bleed nipple.
Do not continually squeeze and release the
lever at this point.
If this is not observed, air bubbles may remain mixed
in with the oil inside the caliper, and it will take longer
to bleed the air. (If the lever is continually squeezed
and released, drain out all of the oil and then add oil
again.)
Bag
Bleed nipple
1. Set the brake lever so that it
is parallel to the ground, and
then remove the upper bleed
screw and insert the oil
funnel and the oil stopper.
5. The oil level in the oil funnel will drop at this time, so be sure to keep adding
oil to maintain the oil level so that air is not drawn in through the port (so that
air does not enter through the port).
Tightening torque:
4 - 6 N·m {35 - 53 in. lbs.}
Bleed nipple
Lever operation
Loose Slightly stiff Stiff
8. If the brake lever is then operated, air bubbles in the system will rise up
through the port into the oil funnel. Once the bubbles stop appearing, depress
the brake lever as far as it will go.
The normal condition is for the lever to be stiff at this point.
Tightening torque:
0.3 - 0.5 N·m {2.7 - 4.4 in. lbs.}
6. Once air stops coming out from the bleed nipple, temporarily tighten
the bleed nipple and pull out the oil stopper.
Oil stopper
4. Set a 7 mm socket wrench in place as shown in the illustration, and then
attach the bag to the tube. Connect the tube to the bleed nipple and then
loosen the bleed nipple.
After a little while, the oil and air will flow naturally from the bleed nipple into
the tube. In this way it will be possible to easily extract the greater part of the
air remaining inside the brake system.
It may help to shake the hose gently or to tap the reservoir tank or caliper
gently with a screwdriver or move the position of the caliper at this time.
SI-0061A-002-00
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