Help!! A couple of months ago, I renewed all 5 flexible brake hoses on my 1997 LWB 3.0 GX Colorado and generally cleaned up discs, callipers, pads etc. Brake fluid changed -all OK and no issues at all.
During this work, I noted that the rigid brake pipes over the left rear axle were badly corroded and needed replacing. Ordered new ones from Mr T. The old pipes were removed OK, but to get the top pipe on the Load Sensing Valve free, necessitated the removal of the valve. Again, no huge problems other than usual corrosion! All freed and cleaned up, including bleed nipple.
Everything refitted to the car and bleeding commenced. BIG PROBLEM! Despite repeated attemps there is obviously air trapped somewhere in the system and the brake pedal is ineffective - asmall amount of pressure can be pumped up and help but falls away as soon as pedal is released.
Does anyone have any ideas or guidance for this one? Is there any Toyota guidance/Service Bulletin/procedure? I have searched through forums but can't seem to get a definite answer.
Hope someone can help.
During this work, I noted that the rigid brake pipes over the left rear axle were badly corroded and needed replacing. Ordered new ones from Mr T. The old pipes were removed OK, but to get the top pipe on the Load Sensing Valve free, necessitated the removal of the valve. Again, no huge problems other than usual corrosion! All freed and cleaned up, including bleed nipple.
Everything refitted to the car and bleeding commenced. BIG PROBLEM! Despite repeated attemps there is obviously air trapped somewhere in the system and the brake pedal is ineffective - asmall amount of pressure can be pumped up and help but falls away as soon as pedal is released.
Does anyone have any ideas or guidance for this one? Is there any Toyota guidance/Service Bulletin/procedure? I have searched through forums but can't seem to get a definite answer.
Hope someone can help.