Yamaha YFM400FAR Service Manual

Also see for YFM400FAR: Owner's manual Service manual Assembly manual

Contents

3 - 41CHKADJBLEEDING THE HYDRAULIC BRAKE SYSTEMBLEEDING THE HYDRAULIC BRAKESYSTEMWARNINGBleed the brake system if: The system has been disassembled. A brake hose or brake pipe have beenloosened or removed. The brake fluid has been very low. The brake operation has been faulty.A loss of braking performance may occur ifthe brake system is not properly bled.1.Bleed: Brake system*****************************************************Air bleeding steps:a.Add the proper brake fluid to the reservoir.b.Install the diaphragm. Be careful not to spillany fluid or allow the reservoir to overflow.c.Connect the clear plastic hose 1 tightly tothe caliper bleed screw 2.d.Place the other end of the hose into acontainer.e.Slowly apply the brake lever several times.f. Pull the lever in and hold it.g.Loosen the bleed screw and allow the leverto travel towards its limit.h.Tighten the bleed screw when the lever limithas been reached, then release the lever.i. Repeat steps (e) to (h) until all the airbubbles have disappeared from the fluid.j. Tighten the bleed screw.NOTE:If bleeding is difficult, it may be necessary tolet the brake fluid settle for a few hours.Repeat the bleeding procedure when the tinybubbles in the system have disappeared.k.Add brake fluid to the proper level.Refer to “CHECKING THE FRONT BRAKEFLUID LEVEL”.T R..Bleed screw:6 Nm (0.6 m • kg, 4.3 ft • lb)