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General Procedures > < Parking Brake

206 Parking Brake System Description and Testing

Parking Brake and Actuation - Parking Brake Ikon 1999 (01/2000-)
Diagnosis and Testing

Inspection and Verification

  1. Verify the customer concern by operating the parking brake system.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical Electrical
  • Parking brake control
  • Parking brake cable
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom Chart

Symptom Possible Sources Action
The parking brake will not apply
*
Parking brake control.
*
Parking brake cable.
*
GO to Pinpoint Test A.
The parking brake will not release
*
Parking brake control.
*
Parking brake cable.
*
GO to Pinpoint Test B.

PINPOINT TEST A : THE PARKING BRAKE WILL NOT APPLY
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: CHECK FOR MISADJUSTED REAR PARKING BRAKE CABLE
1
Operate the parking brake control several times to adjust the cable.

Does the parking brake now engage correctly?
Yes
Vehicle OK.
No
GO to A2.
A2: CHECK FOR WORN BRAKE SHOES
1
Inspect the brake shoes for excessive wear. REFER to Section  206-00 Brake System - General Information.

Are the brake shoes and linings OK?
Yes
GO to A3.
No
INSTALL new brake shoes. REFER to Section  206-02 Drum Brake. TEST the system for normal operation.
A3: CHECK FOR DAMAGED PARKING BRAKE CABLES
1
Inspect the parking brake cables for damage, rust or fraying.

Are the parking brake cables OK?
Yes
CHECK for other causes such as loose parking brake control or conventional brake system components. REFER to Section  206-00 Brake System - General Information.
No
REPAIR or INSTALL the parking brake cables as necessary. TEST the system for normal operation.

PINPOINT TEST B : THE PARKING BRAKE WILL NOT RELEASE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: CHECK PARKING BRAKE CABLES
1
Loosen the parking brake cable tension.
  • Rotate the rear wheels by hand.

Did the rear wheel turn freely?
Yes
INSTALL a new parking brake control.
REFER to Parking Brake Control in this section.
TEST the system for normal operation.
No
GO to B3.
B2: CHECK PARKING BRAKE CONTROL
1
Raise and support the vehicle on a lift with the parking brake fully applied. REFER to Section  100-02 Jacking and Lifting.
  • Release the parking brake by pulling upwards on the control level and pushing the release button.

Did the parking brake release?
Yes
CHECK for other causes such as conventional brake system components. REPAIR or INSTALL new components as necessary. REFER to Section  206-00 Brake System - General Information.
No
GO to B1.
B3: CHECK FRONT PARKING BRAKE CABLE
1
Disconnect the front parking brake cable from the rear parking brake cable at the equalizer.
  • Rotate the rear wheels by hand.

Did the rear wheel turn freely?
Yes
INSTALL a new front parking brake cable.
REFER to Parking Brake Cable in this section.
TEST the system for normal operation.
No
GO to B4.
B4: CHECK REAR PARKING BRAKE CABLES
1
Disconnect the rear parking brake cable at the rear brakes, one at a time.
  • Rotate the wheel affected by the disconnected parking brake cable.

Did the wheel turn freely?
Yes
INSTALL a new rear parking brake cable.
REFER to Parking Brake Cable in this section.
TEST the system for normal operation.
No
CHECK for other causes such as conventional brake system components. REPAIR or INSTALL new components as necessary. REFER to Section  206-00 Brake System - General Information.

General Procedures > < Parking Brake