Hello just got a 07 Navigator with 117k miles that pulled to the right when driving then to the left when brakes applied. I found out that the passenger side caliper pin were frozen and pistons kept brake pads applied.I had both calipers and pads replaced. Afterwards when driving noticed that the brakes took a second to release when I released the brake pedal was released. With the front on jack and spinning the tires discovered that the drivers caliper was dragging now.I replaced the drivers caliper again and brake hose and cured the dragging and the slow to release issues.I had the passenger hose replaced and when it came time to bleed got no brake fluid out of passenger caliper bleed screw so checked the hose fitting and still no fluid then unbolted hose and got no brake fluid out of brake line itself.Where do I start to look for the blockage?

Replace the brake hoses they have degraded internally and are blocked. Preferrably replace them with stainless brake lines instead of the rubber. Stainless won't degrade internally over time and provide better braking power,.A real common problem on older vehicles.

Yep, replace the brake hoses. In addition to normal degradation, hoses can be collapsed by rust where they go thru brackets, especially in salt states. Just think, they spread salt for safety, and destroy your brakes in the process.

Lynnmor wrote:Yep, replace the brake hoses. In addition to normal degradation, hoses can be collapsed by rust where they go thru brackets, especially in salt states. Just think, they spread salt for safety, and destroy your brakes in the process.Not just the brakes, but the electrical connections as well. Why, every time I'm working on a vehicle I own and have access to electrical connectors, I take them apart (Molex connectors or not) and fill them with di-electric grease

Go back to the other end of the steel line. Keep going til you find the problem. Another thought, is the ABS working? You may have to activate the system to get a proper bleed.

Look at the specific bleeding procedures for your vehicle. Many newer vehicles are required to have a specific procedure for AbS brakes.

2007 Navigator No Brake Fluid at Caliper | Good Sam Community

SidecarFlip
Explorer III
Jun 02, 2019
Replace the brake hoses they have degraded internally and are blocked. Preferrably replace them with stainless brake lines instead of the rubber. Stainless won't degrade internally over time and provide better braking power,
.

A real common problem on older vehicles.
Lynnmor
Explorer
Jun 02, 2019
Yep, replace the brake hoses. In addition to normal degradation, hoses can be collapsed by rust where they go thru brackets, especially in salt states. Just think, they spread salt for safety, and destroy your brakes in the process.
SidecarFlip
Explorer III
Jun 02, 2019
Lynnmor wrote:
Yep, replace the brake hoses. In addition to normal degradation, hoses can be collapsed by rust where they go thru brackets, especially in salt states. Just think, they spread salt for safety, and destroy your brakes in the process.

Not just the brakes, but the electrical connections as well. Why, every time I'm working on a vehicle I own and have access to electrical connectors, I take them apart (Molex connectors or not) and fill them with di-electric grease
bguy
Explorer
Jun 02, 2019
Go back to the other end of the steel line. Keep going til you find the problem.
Another thought, is the ABS working? You may have to activate the system to get a proper bleed.
Grit_dog
Navigator
Jun 02, 2019
Look at the specific bleeding procedures for your vehicle. Many newer vehicles are required to have a specific procedure for AbS brakes.
whjco
Explorer
Jun 02, 2019
SidecarFlip wrote:
Replace the brake hoses they have degraded internally and are blocked. Preferrably replace them with stainless brake lines instead of the rubber. Stainless won't degrade internally over time and provide better braking power,
.

A real common problem on older vehicles.

x2. Another problem with old flexible hoses is that the interior degrades and restricts brake fluid flow just enough to allow fluid past the restriction when applied but doesn't allow the calipers to retract thereby causing the brakes to drag and overheating the pads and rotor.

However, stainless braid brake lines aren't infallible. I had a total brake failure in my 2000 Ford Excursion when the flex section of brake line between the master cylinder and the anti-lock unit blew out. The truck was 10 years old at the time this happened.
Grit_dog
Navigator
Jun 02, 2019
Appears OP has replaced both front flex hoses already, or did I misread?
mich800
Explorer
Jun 02, 2019
Grit dog wrote:
Appears OP has replaced both front flex hoses already, or did I misread?

Yes, everyone is giving advice for things they did or not applicable. Appears they removed the flex line and no fluid at the hard line.
rowekmr
Explorer
Jun 02, 2019
Thanks everyone for the advice.

To clear things up we did replace both brake hoses. After replacing passenger hose we discovered no brake fluid coming out at bleeder screw, or loosened caliper banjo fitting on caliper nor the hard line fitting (brake hoses removed) with foot on brake pedal.
BenK
Explorer
Jun 03, 2019
Assume you have worked on brakes before and pretty much know what you are doing...if not, suggest going to a ASE Master Brake mechanic

Also assume you are waiting for the caliper & hose to fill up with brake fluid...then it will flow out the bleeder

Is the brake pedal going to the floor? Or is it stopping firmly?

If stopping firmly, there is a blockage

If going to the floor, the fluid is going somewhere (assuming the MC is in good condition)...like filling up the caliper and hose...