North Wales
mechanic and garage services Dulas
Repair disc brake locked in the system "floating" terminal, Front Axle left in addition to right
On the basis in the car Mazda 323 1990, 1. 3 liter SOHC 8V 1949 kW (67 horsepower) at mileage around 175tkm
1. Symptoms
After defeating the serpentine huge batch terrain, stopping and re-starting a motor vehicle suddenly began to behave while travelling so that the drivers had the impression which the car automatically brakes. After stopping in July and integrity check brake pedal discs were red-hot in addition to smoked. After cooling and again, careful of traffic driving conditions as time passes improved. On the way back for a passing fancy stretch fuel consumption offers increased by 1. 5 liters. After lifting with the actual lifting jack left in addition to right wheel barely provided but roam "from hand", the brakes blocked. The efficient wheel disc brakes at ease going into rotary motion hand revolves same, and only after a little while frictional force bearings That they lead wheel and brake with a stop.
2. Diagnosis
Guide pin at which the skids with brake caliper yoke got become blurred. The reason for that phenomenon were guide slots and rusty bolts. Water defeated rubber seals and spilled in the system. Began to produce throughout August rust. Metal of guides and guide pin as time passes under the effect associated with oxidation processes as strong, boosted so that thwarted reciprocating movement in the hydraulic accumulator clamping yoke. The surfaces of brake pads therefore adhered to the brake disc continuously, which resulted in excessive heating in the brake discs and the irregular loss, which could be witnessed when created, palpable finger grooves on the surface of the disc.
3. Repair
Repair consisted in distribution the brake, pulling the guide pin in the upper and lower (sa varying lengths nevertheless the same diameter), pulling out the rubber seals in the upper (two-piece) in addition to lower (one-piece) the guide holes in the yoke brush, cleaning and polishing Information pins. Brakes, front left and following these activities were complex again. The final test was reached after having a careful measurement of the career of brake in in addition to was successful. Brake was 2, 2kN - 2, 1kN.
4. Difficulty> Medium, repair is time-consuming, applies to the central security system within your car, in amateur conditions it about three days of work 6 hours per day, depending on experience in addition to skill.
5. Costs
At the time of repair will never develop any direct costs following repair parts were reused. When it turned out there preparatory activities need to purchase a couple of guide pin brake pads along with springs, security imprints. The cost is 15 € regarding four pins, two springs and 2 spring locks the hooks from slipping.