I have a 1994, F350, crew cab dually, 7.3. Having a problem with right front brake - been told it is either line collapsing or caliper hanging up. Done it twice - both times got it loose by going back and forth hitting brakes. Need detailed instructions on how to replace the caliper and line. First time working on this truck. Have done engine work, etc. on my 29 year old GMC, with help. Can manage about anything with good instructions. Also been told should do both sides as truck will pull to the new side. Thanks in advance.

 

First the flex hose. These can deteriorate with age to the point where, under pressure from the brake pedal, they will let fluid thru to the caliper but not let it return to the master cyl., hence the brake stays on. If you can get it to lock up at home jack the right side up and unscrew the bleed screw a turn or so. If this releases the brake then you know you need to replace the flex. hose. If not then you know it is the caliper. Two issues with calipers. One is that the caliper slides may be sticky and so not letting the braking force off one pad. The other is the piston may not be releasing usually due to water and dirt getting past the piston rubber seal. If necessary take the pads out and see if the piston pushes back in easily with a "G" clamp. You can prise the rubber seal back a bit and spray WD40 round the piston. Do not use grease or ordinary oil as these will rot the rubber. Clean and lightly grease the caliper sliding surfaces and reassemble.

 

Or just rebuild it, while it's out


as I recall there is the piston and 2 seals

it cost like 8 bucks

 

F-150-250-350 4x2 and 4x4, E-150-250-350, Bronco and F-Super Duty Vehicles
Front Disc Brake Caliper, E-250-350

Removal

1. To avoid fluid overflow when the caliper wheel cylinder pistons are pressed into the caliper cylinder bores, siphon or dip part of the brake fluid out of the brake master cylinder reservoir.

l Discard the removed fluid.

2. Raise the vehicle on a hoist and install safety stands. Remove the wheel and tire.

NOTE:
Do not use a screwdriver or similar tool to pry the wheel cylinder piston away from the front disc brake rotor.

3. Place an appropriate size C-clamp on the front disc brake caliper with end of clamp against caliper and end of screw against outer shoe. Tighten the clamp to bottom the wheel cylinder pistons in the cylinder bores. Remove the C-clamp.


4. Remove the upper anchor bolt only.



NOTE:
The front disc brake caliper does not have to be completely detached to remove and install the brake shoes and linings.

5. Swing the front disc brake caliper down. Remove brake shoes and linings from the front wheel spindle.



6. If the front disc brake caliper is to be removed for repair or replacement, disconnect the front brake hose from the front disc brake caliper. Plug the end of the front brake hose to prevent fluid loss and the entry of air into the system. Remove the lower anchor bolt and remove the front disc brake caliper at this time.




7. Inspect the slide pin assemblies for any damage or wear. Replace if necessary, Inspect the rubber boots over the anchor bolts. Replace if torn or deteriorated.

Installation
1. Install slide pin assemblies. Lubricate slides with Disc Brake Caliper Slide Grease D7AZ-19590-A (ESA-M1C172-A) or equivalent. Position brake shoes and linings onto front wheel spindle. Rotate front disc brake caliper back up into position. If the front disc brake caliper was removed, position it to the front wheel spindle.

2. Install the anchor bolt(s) through front disc brake caliper and front wheel spindle. Tighten bolts to 115-135 N-m (85-100 ft-lb).

3. Replace both washers (each side of inlet block). Connect the front brake hose. Tighten inlet block bolt to 14-20 N-m (10-15 ft-lb). Bleed the system as described in this section.


4. Install wheel and tire assembly. Remove the safety stands and lower the vehicle.

5. If the brakes were not bled, and front disc brake caliper was not removed check the fluid level in the brake master cylinder reservoir and fill if required.

6. Pump the brakes several times to make sure you get a firm brake pedal (2455).

7. Operate the vehicle to check brake operation.

 

Thanks to all of you for the advice. Hope to tackle this sometime this week. Will let you know how it turns out.