Complete brake fluid flush procedure for 2014 Ram 2500 with 6.7L Cummins Diesel, removing old brake fluid and replacing with fresh DOT 4 fluid to restore braking performance and prevent corrosion.

Warnings

Tools required

Parts

• Mopar DOT 4 Brake Fluid × 3 — Mopar 68046821 or equivalent DOT 4

Fluids

• Mopar DOT 4 Brake Fluid — 2 qt

Preparation

1. Park vehicle on level, solid ground and engage parking brake.
2. Place wheel chocks behind rear wheels if raising front, or front wheels if raising rear.
3. Loosen all wheel lug nuts 1/2 turn before raising vehicle.
4. Raise vehicle using floor jack at manufacturer-designated lift points and support securely on all four jack stands.
5. Remove all four wheels to access brake calipers.
6. Locate all four brake bleeder screws (one per caliper) and spray with penetrating oil if corroded.
7. Open vehicle hood and locate brake fluid reservoir on master cylinder (driver side firewall).
8. Clean area around brake fluid reservoir cap to prevent contamination.
9. Have approximately 2 quarts of fresh Mopar DOT 4 brake fluid available and unopened until needed.

Procedure

1. 1

   Remove old fluid from master cylinder reservoir
   Use turkey baster or brake fluid transfer pump to remove as much old brake fluid as possible from the master cylinder reservoir. Dispose of old fluid in appropriate waste container. Wipe inside of reservoir with clean lint-free rag to remove sediment. Fill reservoir to MAX line with fresh Mopar DOT 4 brake fluid from sealed container.
   ⚠Do not allow reservoir to drop below MIN line during entire procedure or air will enter the system.
2. 2

   Prepare bleeder screw and hose at right rear caliper
   Start with the wheel farthest from master cylinder (right rear). Attach clear plastic tubing over bleeder screw, ensuring tight fit. Place other end of tubing into collection container with enough old brake fluid to submerge tube end (prevents air from being drawn back in). Clean bleeder screw area with wire brush if needed.
   ℹ️Bleeding sequence for this vehicle: Right Rear, Left Rear, Right Front, Left Front (farthest to closest).
3. 3

   Bleed right rear caliper
   Have assistant firmly depress brake pedal and hold down. While pedal is held, open bleeder screw 1/2 to 3/4 turn using box-end wrench. Old fluid will flow through tube. When pedal reaches floor and fluid flow stops, close bleeder screw BEFORE assistant releases pedal. Assistant then releases pedal slowly. Repeat process until fluid exiting tube is clean and clear with no bubbles. Monitor reservoir constantly and refill to MAX line frequently - never let it drop below halfway.
   ⚠️Bleeder screw MUST be closed before pedal is released or air will be drawn into system. Communication with assistant is critical.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
4. 4

   Bleed left rear caliper
   Move to left rear caliper. Attach tubing to bleeder screw and submerge other end in collection container. Repeat bleeding process: assistant depresses pedal and holds, open bleeder screw, fluid flows, close bleeder screw, release pedal. Continue until fluid is clear with no air bubbles. Refill master cylinder reservoir as needed.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
5. 5

   Bleed right front caliper
   Move to right front caliper. Attach tubing to bleeder screw and submerge other end in collection container. Repeat bleeding process: assistant depresses pedal and holds, open bleeder screw, fluid flows, close bleeder screw, release pedal. Continue until fluid is clear with no air bubbles. Refill master cylinder reservoir as needed. Front calipers may require more cycles due to larger caliper volume.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
6. 6

   Bleed left front caliper
   Move to left front caliper (closest to master cylinder, last in sequence). Attach tubing to bleeder screw and submerge other end in collection container. Repeat bleeding process: assistant depresses pedal and holds, open bleeder screw, fluid flows, close bleeder screw, release pedal. Continue until fluid is clear with no air bubbles. Refill master cylinder reservoir as needed.
   Torque spec

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

   Final reservoir fill and system check
   Fill master cylinder reservoir to MAX line with fresh Mopar DOT 4 brake fluid. Ensure cap is cleaned and properly seated. With assistant in driver seat, have them pump brake pedal 15-20 times and hold pressure. Pedal should feel firm and not sink. Check all four bleeder screws for tightness and verify no leaks.
   ⚠️If brake pedal feels soft or spongy, air remains in system. Repeat bleeding procedure until pedal is firm.
   Torque spec

   Bleeder Screw10 Nm (7 lb-ft)
8. 8

   Reinstall wheels
   Clean wheel mounting surfaces on hubs. Reinstall all four wheels, threading lug nuts by hand first. Lower vehicle until wheels just contact ground but vehicle weight is still on jack stands. Torque lug nuts in star pattern to specification. Fully lower vehicle and remove jack stands. Perform final lug nut torque check in star pattern.
   Torque spec

   Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Verify master cylinder reservoir is at MAX line and cap is properly installed.
2. Wipe down all brake components and calipers to remove any spilled brake fluid.
3. If brake fluid contacted any painted surfaces, wash immediately with soap and water.
4. Dispose of old brake fluid according to local environmental regulations - take to auto parts store or hazardous waste facility.

Verification

• With engine off, pump brake pedal several times. Pedal should feel firm and consistent with no sponginess.
• Start engine and verify brake pedal height and firmness remains consistent.
• Check master cylinder reservoir level - should be at MAX line with no air bubbles visible.
• Inspect all four bleeder screws and surrounding areas for any signs of leakage.
• Perform low-speed test drive in safe area (empty parking lot). Test brakes at 5 mph, 10 mph, and 15 mph. Braking should be firm and immediate with no pedal fade or pulling to one side.
• After test drive, recheck master cylinder fluid level and all bleeder screws for leaks.
• If vehicle pulls to one side, pedal is soft, or stopping distance seems increased, DO NOT DRIVE and have system inspected by qualified technician immediately.

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