DIY Suspension Steering and Braking System Cleaning Inspection 20 000km

AHW308 is now almost one-year old OTR. Just clocked around 20,000km. Its the time for another round of under_carriage/tyre_well general cleaning and inspection.

The most important inspection for safety are the Suspension, Steering and Braking System besides Tyres. Tyre inspection and rotation were done a week earlier.

After cleaning, the inspection began...

Steering and Suspension System
All links/joints and rubber bushes/boots are perfectly OK. Nuts and bolts are also tight. No loose one..


Braking System
Brake fluid level and all brake lines/hoses. OK
Brake pads. OK
Brake disks... sudah makan sikit. By using a Vernier Caliper ...

... front brake disk thickness is 25.32mm [new disk thickness was 26.20mm]. Sudah makan 0.88mm sahaja after one year. OK dan boleh tahan lagi tu...

Rear brake disks are virtually no wear and tear at all [yet]...


Drive Shafts
Drive shaft boots. OK
Shafts still look perfectly OK in gunmetal color. No rust at all! How come in AW forum got ppl complain their shafts oredy rusty ah? Never clean after use meh?


Read also DIY: General Cleaning/Inspection [@10,000th km]
p/s Sunday Jan 17th, AHW308 will be re-test driven to and fro Frasers Hill...

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Abs Brake System Maintenance

The anti-lock brake system provides the ability to steer around objects while braking in slippery road conditions. When the system senses a wheel is about to lock up, the brake pressure is released from that wheel to help maintain directional control. The system requires little service and maintenance, but brake fluid replacement is still needed. Over time, the anti-corrosion properties of the brake fluid that protect delicate parts dissipate, and the fluid becomes slightly thicker. Routine fluid replacement restores the fluid to factory specs.

Fluid Maintanence

Fluid replacement involves removing old fluid from the system and bleeding the brakes in the proper sequence. Most ABS systems do not require any special functions to bleed the system. However, certain systems, like the Delco ABS IV, do. A scan tool must be used to home the motor pack on this system before bleeding to remove the fluid that is in the ABS systemssystem. Most others home the solenoid valves a few seconds after the key is turned on. To replace the fluid, turn the key on and wait for the ABS warning light to go off and bleed according to sequence, as you would normally do during servicing of the standard brake system.

Wheel Speed Sensor Maintanence

Check the wheel-bearing play as you would in a routine brake inspection. The gap between the exciter ring in the hub assembly and the wheel speed sensor is critical, and loose wheel bearings will cause inaccurate wheel speed signals to the ABS computer. Another area of routine maintenance is the wheel speed sensor. As the brake pads wear, the magnet in the wheel speed sensor will attract metal particles. These particles can coat the sensor tip and dampen the signal causing inaccurate readings. This is especially a concern if the brake pads have worn to the point that metal-to-metal contact has occurred. Remove the sensor from the hub assembly and remove these particles. Many times this will fix an ABS malfunction.

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