Julian T
Well-Known Member
Recently my truck had developed a worrying habit, the rear axle was doing more braking than the front axle so having diagnosed front callipers requiring a rebuild I got my hands on a pair of seal kits and stripped and rebuilt the front callipers both callipers had partially seized pistons, I also replaced the pistons and seals in the brake master cylinder, I was not overly concerned about the rear callipers as I rebuilt those a couple of years ago when the o/s/r seized.
However after reassembly and bleeding the brake system I have discovered that should you apply the brakes and hold pressure as if doing a crash stop the pedal will drop (fade) after initial resistance, engine on, with engine off it does not and is hard as rock, engine on and first application brakes feel like they have air in the fluid, second application they feel right and after approximately 2 seconds the pedal starts to drop, also the brake warning lamp (not handbrake) is now staying on after the engine is started.
The sensor for the brake warning lamp is I assume the one in the bottom of the reservoir.
Brakes were bled initially at the master and then at the callipers starting at furtherest from the master cylinder.
At this stage I am wondering what I have missed, any suggestions will be appreciated.
Thanks Julian
However after reassembly and bleeding the brake system I have discovered that should you apply the brakes and hold pressure as if doing a crash stop the pedal will drop (fade) after initial resistance, engine on, with engine off it does not and is hard as rock, engine on and first application brakes feel like they have air in the fluid, second application they feel right and after approximately 2 seconds the pedal starts to drop, also the brake warning lamp (not handbrake) is now staying on after the engine is started.
The sensor for the brake warning lamp is I assume the one in the bottom of the reservoir.
Brakes were bled initially at the master and then at the callipers starting at furtherest from the master cylinder.
At this stage I am wondering what I have missed, any suggestions will be appreciated.
Thanks Julian