BMW K 1100 LT/RS - Manual (Page 289)

34.31
Troubleshooting: Front wheel/rear wheel brake
Brake rubs/vibrates.
no
Check brake pads.
Are brake pads worn/damaged? yes
Renew brake pads.
Brake pedal soft/spongy.
no
Check brake fluid.
Is brake fluid too low? yes
Top up brake fluid to MAX level.
no
Check brake system.
Is there air in brake system? yes
Bleed brake system.
no
Check brake system.
Is brake system leaking? yes
Repair leaks.
Brake pedal difficult to move/hard.
no
Check brake pads.
Are brake pads glazen/worn? yes
Renew brake pads.
no
Check brake piston/brake cylinder.
Does brake piston/brake cylinder jam? yes
Replace brake piston/brake cylinder
no
Check brake system.
Is supply from brake fluid reservoir blocked? yes
Clean brake fluid reservoir/brake line.