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Home >> Fiat >> 2018 >> 500 Lounge, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Base Brakes (Service Information) - 500 - Electric) >> Hydraulic/Mechanical >> Master Cylinder, Brake >> Installation

Master Cylinder, Brake: Installation

WARNING: This page is about a different variant/trim than selected.
GC0083936Courtesy of CHRYSLER GROUP, LLC
CAUTION:

When installing a master cylinder on the vehicle, a NEW vacuum seal (2) MUST be installed on the master cylinder mounting flange (1).

NOTE:

The master cylinder must be bled before installing it on the vehicle.

  1. Bench bleed the master cylinder. Refer to STANDARD PROCEDURE .
  2. Wipe the face of the power brake booster clean where the vacuum seal on the rear of the master cylinder comes in contact when it's installed. Do not get any cleaner or debris inside the booster.
  3. If the master cylinder does not have a new vacuum seal (2) on the mounting flange (1), remove it. Install a NEW vacuum seal on the master cylinder mounting flange making sure the seal fits squarely in its groove.
    CAUTION:

    If resistance is met during master cylinder insertion into power brake booster, the master cylinder push rod may not be lined up with the booster push rod. Remove the master cylinder, realign and insert it again.

    GC0152571Courtesy of CHRYSLER GROUP, LLC
  4. Line up the master cylinder mounting holes with the mounting studs on the power brake booster. Ensure the master cylinder piston push rod lines up with the booster push rod, then carefully slide the master cylinder into the power brake booster until it contacts the face of the booster.
  5. Install two NEW master cylinder mounting nuts (2). Tighten each nut to 25 N.m (18 ft. lbs.).
  6. Connect the primary and secondary brake tubes (1) to the master cylinder outlet ports and Integrated Control Unit ports. Tighten the tube nuts to 18 N.m (159 in. lbs.).
  7. Connect the wiring harness connector (3) to the brake fluid level switch.
  8. Connect the vacuum hose to the check valve on the brake booster.
    GC0152572Courtesy of CHRYSLER GROUP, LLC
  9. If equipped with a manual transaxle and a new reservoir is being installed, remove the plug (1) for the clutch actuator port.
  10. If equipped with a manual transaxle, slide the clutch actuator hose onto the reservoir port. Install the hose clamp just past the upset bead on the port.
    GC0152394Courtesy of CHRYSLER GROUP, LLC
  11. Position the battery tray and PCM in the vehicle. Route the wire harness and close the wire harness retainers (3).
    GC0152563Courtesy of CHRYSLER GROUP, LLC
  12. Install the battery tray (3) with one nut (5) and two bolts (1) tightened to 25 N.m (18 ft. lbs.).
  13. Engage the engine wire harness connector (2) to the battery tray (3).
  14. Engage two engine wire harness retainers (4) to the battery tray (3).
  15. Engage two starter wire harness retainers (6) to the battery tray (3).
    GC0152393Courtesy of CHRYSLER GROUP, LLC
  16. Connect the powertrain control module (PCM) electrical connectors (1 and 2).
  17. Install the battery. Refer to BATTERY, INSTALLATION .
    GC0152416Courtesy of CHRYSLER GROUP, LLC
  18. Install the air cleaner body (4). Refer to appropriate service information.
    GC0152354Courtesy of CHRYSLER GROUP, LLC
  19. Connect the negative (ground) cable on the battery.
  20. Fill the master cylinder reservoir to the proper level.
  21. Install the engine cover (1).
    WARNING:

    Be certain a firm brake pedal is achieved prior to attempting to operate the vehicle. If a firm brake pedal cannot be achieved, bleed the brake hydraulic system and check for leaks.

  22. Install a scan tool to initialize the ABM and perform the following:
    1. Clear any faults.
    2. Fill the master cylinder to the proper fill level and bleed the base and ABS hydraulic systems. Refer to STANDARD PROCEDURE .
    3. Check for leaks.
    4. Perform the ABS Verification Test.
  23. Start engine and let idle for approximately 30 seconds, then turn off and wait about 1 minute. Fully stroke brake pedal to assure there are several strokes with assist prior to depletion of vacuum. If not, check for missing seal between master cylinder and booster.
  24. Road test the vehicle to ensure proper operation of the brakes.
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