Brake Pads - Front

Replace front disc brake pads on a 2007 Ram 3500 with 5.9L Cummins diesel engine, including proper caliper service and bedding procedure.

Warnings

Tools required

Parts

• Front brake pad set (axle set for both sides) × 1 — Use OEM specification or quality aftermarket
• Brake hardware kit (anti-rattle clips, shims) × 1 — Often included with pad set

Fluids

• DOT 3 brake fluid — 0.25 qt

Preparation

1. Park vehicle on level, solid ground. Place wheel chocks behind rear wheels.
2. Start engine briefly to build vacuum assist, then turn off. Pump brake pedal 10-15 times to release vacuum from brake booster.
3. Open brake fluid reservoir cap in engine bay to allow fluid displacement when compressing caliper pistons. Check fluid level and remove some if near MAX line.
4. Loosen front wheel lug nuts 1/2 turn while vehicle is on ground, but do not remove.
5. Lift front of vehicle using floor jack at front axle differential housing or frame rail jacking points.
6. Place jack stands under frame rails behind front axle. Lower vehicle onto stands and verify stability before working.
7. Remove front wheels completely and set aside.

Procedure

1. 1

   Inspect brake system condition
   Before beginning disassembly, inspect the brake rotor surface for deep grooves, cracks, or heat damage. Check brake hoses for cracks or swelling. Inspect caliper slide pins for evidence of seized or corroded movement. If rotors are damaged beyond light scoring, they should be replaced or resurfaced. Measure rotor thickness if possible and compare to specification (minimum thickness usually stamped on rotor hat).
2. 2

   Remove caliper slide pin bolts
   Locate the two caliper mounting/guide bolts on the rear side of the caliper. Verify the correct socket size for your specific caliper (commonly a large hex or Torx head on this platform). Using the correct socket or wrench, remove the lower mounting bolt completely. Remove the upper slide pin bolt. Keep these bolts and their rubber dust boots clean. The caliper is now free to pivot or remove.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)
3. 3

   Remove caliper from rotor
   Carefully lift the caliper up and off the brake rotor and caliper bracket. The brake hose is still attached, so do not let the caliper hang by the hose. Use a wire hanger or bungee cord to suspend the caliper from the suspension or frame. Position it so there is no tension on the rubber brake hose.
   ⚠Never allow the caliper to hang by the brake hose. The weight can damage the hose internally, leading to brake failure.
4. 4

   Remove old brake pads and hardware
   Remove the outboard brake pad from the caliper bracket. Remove the inboard brake pad. Note the orientation and position of any anti-rattle clips, shims, or pad retention hardware. Remove the anti-rattle clips from the caliper bracket. Inspect all hardware for damage, rust, or wear. Take photos if needed to remember hardware placement.
5. 5

   Clean caliper bracket and slides
   Use a wire brush to clean the brake pad contact surfaces on the caliper bracket where pads slide. Remove all rust, debris, and old brake dust. Spray thoroughly with brake cleaner and wipe clean. Inspect the caliper slide pins: remove them from the bracket, clean thoroughly, and inspect rubber boots for tears. Apply fresh silicone brake grease to the slide pins and reinstall them into the bracket, ensuring boots are properly seated.
   ⚠Use only silicone brake grease on slide pins and pad contact points. Do not use petroleum-based grease as it will damage rubber components.
6. 6

   Compress caliper piston
   With the caliper still hanging safely, use a large C-clamp or brake caliper piston tool to slowly compress the caliper piston back into its bore. Position the clamp on the back of the caliper body and against the back of the old inboard pad (or a block of wood). Slowly tighten to push the piston fully into the caliper. This forces brake fluid back into the reservoir. Watch the reservoir in the engine bay to ensure it does not overflow.
   ⚠Compress piston slowly to avoid damaging seals or forcing fluid out of reservoir cap. Have rags ready to catch overflow.
7. 7

   Install new brake hardware and pads
   Install new anti-rattle clips onto the caliper bracket if included in your pad set. Apply a thin layer of silicone brake grease to the pad backing plate edges where they contact the bracket (do not get grease on friction material). Install the new inboard brake pad into the bracket, ensuring it seats properly against the piston. Install the outboard brake pad into the bracket. Verify both pads move freely in the bracket.
8. 8

   Reinstall caliper over pads
   Remove the caliper from its suspended position. Carefully position the caliper over the new brake pads and align the caliper mounting holes with the slide pins in the bracket. Ensure the brake hose is not twisted. Press the caliper fully into place.
9. 9

   Install and torque caliper slide pin bolts
   Do not grease the caliper mounting bolt threads or bolt heads; apply medium-strength threadlocker to the threads if specified by the manufacturer, or install clean and dry per factory spec. Install both upper and lower caliper slide pin bolts by hand. Using a torque wrench, tighten both caliper mounting bolts to the manufacturer specification for this HD platform (verify against factory service data — commonly in the ~150-190 ft-lb / 200-260 Nm range for the 2007 Ram 3500 front caliper bolts). Verify the caliper is secure and pads are properly seated.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)
10. 10

    Repeat for opposite side
    Repeat steps 1 through 9 for the opposite front brake assembly. Always replace brake pads on both sides of an axle together to maintain balanced braking performance. Ensure all hardware and torque specifications are identical on both sides.
11. 11

    Reinstall wheels and torque lug nuts
    Reinstall both front wheels onto the hubs. Thread all lug nuts by hand to prevent cross-threading. Using a torque wrench and star pattern (tightening opposite nuts in sequence), torque all lug nuts to 140 Nm (103 ft-lbs). Re-check torque after full pattern is complete.
    ⚠️Improperly torqued lug nuts can cause wheel separation while driving. Always use a torque wrench and star pattern.
    Torque spec

    Wheel Lug Nuts183 Nm (135 lb-ft)
12. 12

    Lower vehicle and restore brake pedal
    Raise vehicle slightly off jack stands with floor jack. Remove jack stands and lower vehicle completely to ground. Close the brake fluid reservoir cap. Before moving the vehicle, pump the brake pedal slowly 10-15 times until it becomes firm. The first few pumps will move the caliper pistons back out against the new pads. Pedal must be firm before driving. Check brake fluid level and top off to MAX line with fresh brake fluid meeting the specification stamped on the reservoir cap (DOT 3 or DOT 4 as specified) if needed.
    ⚠️Vehicle CANNOT be driven safely until brake pedal is pumped and firm. First pump will go to floor as pistons re-extend.
13. 13

    Perform brake pad bedding procedure
    New brake pads must be properly bedded to achieve full braking performance. In a safe area with no traffic, perform 8-10 stops from 40 mph to 15 mph with moderate pedal pressure, allowing 30 seconds of light driving between stops to cool brakes. Then perform 3-4 harder stops from 50 mph to 20 mph with firm pedal pressure. Allow brakes to cool for 5-10 minutes without using them. Avoid aggressive braking or coming to complete stops during bedding when possible. Do not drive aggressively until bedding is complete.
    ⚠New pads will have reduced stopping power and may produce odor or smoke during bedding. This is normal. Allow proper cooling between stops.

Reassembly

1. If caliper bracket bolts were removed (not standard for pad replacement), apply medium-strength threadlocker and torque to 120 Nm (88 ft-lbs)
2. Re-check wheel lug nut torque after 50-100 miles of driving
3. Monitor brake fluid level for first few days after service and top off if needed

Verification

• Verify brake pedal is firm and does not sink when pressed with engine running
• Test brakes at low speed in safe area before normal driving - vehicle should stop straight without pulling to either side
• Verify no brake fluid leaks around calipers or hoses
• Listen for abnormal noises during initial brake applications - light squealing during bedding is normal, grinding or clicking is not
• After bedding procedure, braking performance should feel normal and balanced
• After 500 miles, verify wheel lug nut torque is still correct at 140 Nm (103 ft-lbs)

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