Manual Bleeding

sd mm 25.04.003
  1. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires and open the hood.

    2. Note: The hydraulic system holds approximately 0.5 quart (0.5 liter) of fluid. It may need to be refilled during the bleeding process to prevent air from re-entering the system.

  2. Remove the reservoir lid and fill the reservoir (see Fig.) with new DOT 4 brake fluid from a tightly sealed container.

    Fig. 1, Reservoir, Hydraulic Clutch Control

  3. Remove the cap from the bleed valve of the secondary cylinder. See Fig.. On the valve, install a transparent drain hose connected to a catch bottle. The hose needs to fit the bleed valve tight enough so it does not fall off when fluid is pumped out.

    1. Bleed Valve

    2. Secondary Cylinder

    Fig. 2, Secondary Cylinder, Hydraulic Clutch Control

    4. Note: The following steps require two people—one in the cab to work the clutch pedal, and one to open and close the bleed valve and watch the fluid.

  4. Bleed the system, as follows.
    1. Open the bleed valve.
    2. Depress the clutch pedal until it stops.
    3. Close the bleed valve.
    4. Return the pedal to the upper position.
    5. Repeat the previous steps until the fluid is clear and free of air bubbles.
    6. Depress the clutch pedal. There should be resistance over the full pedal stroke.
  5. Check the fluid level in the reservoir. If necessary, add or drain fluid to bring the fluid level to between the MIN and MAX lines marked on the side of the reservoir. Install the reservoir lid.
  6. Disconnect the transparent hose. Tighten the bleed valve 88 lbf·in (1000 N·cm) and install the cap on the secondary cylinder bleed valve.
Note:
Parent topic: Fluid Change, Hydraulic Clutch Control
Document Number: 0000119717
Manual Publication Date: 2024-05-23
Topic Publication Date: 2024-10-30