Brake Caliper - Front

Replacement of the front brake caliper on a 1972 Ford F-100 with 302ci V8, including brake line disconnection, caliper removal, installation of new caliper, and brake system bleeding.

Warnings

Tools required

Parts

• Front brake caliper (specify left or right) × 1 — Use OEM specification
• Brake line copper crush washers (banjo bolt) × 2 — Use OEM specification
• Caliper bracket bolts (if corroded or damaged) × 2 — Use OEM specification

Fluids

• DOT 3 brake fluid — 0.25 qt

Preparation

1. Park vehicle on level, solid ground and set parking brake firmly
2. Place wheel chocks behind rear wheels
3. Loosen front wheel lug nuts 1/2 turn while vehicle is on ground
4. Raise front of vehicle with floor jack at frame rail or designated lift point
5. Support vehicle securely on jack stands rated for vehicle weight, positioned at frame rails
6. Remove wheel and tire completely
7. Locate brake fluid reservoir under hood and check fluid level - mark initial level for reference
8. Place catch pan under brake caliper area to catch fluid spillage

Procedure

1. 1

   Compress caliper piston
   Before disconnecting brake line, use a C-clamp to slowly compress the caliper piston back into its bore. Position the C-clamp against the back of the caliper body and against the outboard brake pad. This reduces brake fluid in the caliper and minimizes spillage when the line is disconnected. Compress slowly and watch the master cylinder reservoir - if it begins to overflow, stop and remove some fluid with a turkey baster or fluid pump.
2. 2

   Disconnect brake line from caliper
   Locate the brake line fitting on the inboard side of the caliper. Verify whether your caliper uses a banjo bolt (with two copper crush washers) or an inverted-flare tube nut fitting, as 1972 F-100 calipers commonly use an inverted flare fitting. If the brake line uses an inverted-flare tube nut, use a flare nut wrench (not a standard open-end wrench) to prevent rounding off the tube nut. If it uses a banjo bolt, use a properly sized box wrench or socket. Carefully loosen and disconnect the brake line. Be prepared for brake fluid to drain from the line and caliper. Remove the fitting completely and if applicable, note that there are two copper crush washers - one on each side of the banjo fitting. Discard the old washers (do not reuse). Immediately plug the brake line with a rubber cap or brake line plug to minimize fluid loss and air entry. Allow caliper to drain into catch pan. Do not overtighten on reinstallation.
   ⚠Use a flare nut wrench, not a standard open-end wrench, to prevent rounding off the banjo bolt hex. Do not overtighten on reinstallation as this can crack the banjo fitting.
3. 3

   Remove caliper mounting bolts
   Locate the caliper bracket/support mounting bolts that secure the assembly to the steering knuckle/spindle. Verify the correct head size and mounting arrangement against factory specifications for your specific 1972 F-100 disc brake setup before selecting tools. If bolts are corroded, apply penetrating oil and allow to soak for several minutes. Using the appropriate socket and breaker bar, remove both caliper bracket bolts completely. The caliper and bracket assembly will now be free from the spindle.
   ℹ️These bolts are under significant load and may be very tight. Ensure your tools are secure to prevent slipping and injury.
4. 4

   Remove caliper and bracket assembly
   Carefully lift the caliper and bracket assembly away from the brake rotor and spindle. The brake pads may come with the caliper or remain on the rotor - note their orientation for reinstallation. Set the old caliper assembly aside on the workbench. Do not allow the caliper to hang by the brake line at any time.
5. 5

   Inspect mounting surfaces and hardware
   Examine the spindle mounting surface where the caliper bracket bolts to the knuckle. Remove any rust, corrosion, or debris using a wire brush. Inspect the caliper bracket bolt threads and holes - if threads are damaged or bolts are severely corroded, replace the bolts. Check the brake rotor surface for excessive wear, scoring, or warping. Verify rotor thickness meets minimum specification if there is any doubt about rotor condition.
6. 6

   Prepare new caliper for installation
   Remove the new caliper from packaging. Verify it matches the old caliper (left or right side, mounting configuration). If the caliper came with the piston extended, carefully compress it fully into the bore using a C-clamp. Remove any protective caps from the brake line port. Ensure the caliper bleeder screw moves freely - loosen slightly then retighten to verify (do not remove completely yet).
7. 7

   Install caliper and bracket to spindle
   Position the new caliper and bracket assembly over the brake rotor and align the mounting holes with the spindle. Insert both caliper bracket bolts and thread by hand to ensure proper alignment. If using threadlocker (recommended), apply a small amount of medium-strength threadlocker to the bolt threads. Using a torque wrench and appropriate socket, tighten the caliper bracket/support bolts to the factory-specified torque (verify exact value in the 1972 F-100 shop manual), alternating between bolts.
   Torque spec

   Caliper Bracket Bolts100 Nm (74 lb-ft)
8. 8

   Reconnect brake line to caliper
   Remove the plug from the brake line. Install one NEW copper crush washer onto the banjo bolt, then insert the bolt through the banjo fitting on the brake line. Install the second NEW copper crush washer onto the bolt, then thread the banjo bolt into the caliper brake line port. Hand tighten first to ensure proper thread engagement. Using a 7/16" flare nut wrench and torque wrench, tighten the banjo bolt to specification. Do not overtighten.
   ⚠Always use NEW copper crush washers. Reusing old washers will result in brake fluid leaks and potential brake failure.
9. 9

   Bleed brake caliper
   Attach a clear hose to the caliper bleeder screw and route the other end into a clean container partially filled with fresh DOT 3 brake fluid. Have an assistant pump the brake pedal 3-4 times and hold pressure. With pressure held, use a 5/16" or 3/8" wrench to open the bleeder screw 1/2 turn. Fluid and air will flow through the hose. When flow stops, close the bleeder screw before the assistant releases the pedal. Repeat this process until only clear, bubble-free fluid flows from the bleeder. Monitor the master cylinder reservoir constantly and refill as needed - never let it run dry or air will enter the system. After bleeding is complete, tighten the bleeder screw to specification.
   ⚠️If the master cylinder reservoir runs empty during bleeding, air will enter the entire brake system requiring bleeding at all four wheels. Keep reservoir topped off at all times.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
10. 10

    Verify caliper installation and check for leaks
    Inspect the banjo bolt connection for any signs of brake fluid seepage. Wipe the area clean with a rag and observe for several seconds. Check the bleeder screw for leaks. Pump the brake pedal several times to build pressure and verify the pedal feels firm. Recheck all connections for leaks while pedal pressure is applied. Add brake fluid to the master cylinder reservoir to bring level to the MAX line.
11. 11

    Reinstall wheel and lower vehicle
    Clean the wheel hub face and wheel mounting surface of any dirt or corrosion. Install the wheel and tire onto the hub, ensuring proper seating. Thread all lug nuts by hand to prevent cross-threading. Snug lug nuts in a star pattern using the lug wrench, but do not fully tighten yet. Carefully raise vehicle slightly with floor jack to unload jack stands, remove jack stands, then lower vehicle completely to the ground. With vehicle weight on the wheels, torque lug nuts in a star pattern using a torque wrench to the factory-specified value for the 1972 F-100 (verify in shop manual; commonly in the 85-115 lb-ft range depending on stud size).

Reassembly

1. Ensure brake fluid reservoir is filled to MAX line with fresh DOT 3 brake fluid
2. Clean any spilled brake fluid from brake components, suspension parts, and wheel well
3. Double-check all fasteners are torqued to specification
4. Verify bleeder screw is closed and banjo bolt connection is dry

Verification

• With vehicle still parked and engine off, pump brake pedal 10-15 times - pedal should become firm and hold pressure without sinking
• Start engine (if equipped with power brakes) and verify pedal drops slightly but remains firm
• Inspect all brake line connections at the new caliper for any fluid leakage
• Test drive vehicle at low speed (under 15 mph) in a safe area and apply brakes firmly - verify straight stopping with no pull to either side
• After test drive, recheck all fasteners and connections - retorque if necessary
• Perform several moderate stops from 30-40 mph to seat brake pads - braking performance will improve after pad break-in over first 100-200 miles
• If brake pedal feels soft or spongy after bleeding, additional bleeding may be required - repeat bleeding procedure
• Check brake fluid level after test drive and top off if needed

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