Предварительная операция
Найти причину дефекта (смотреть соответствующую гамму)
Рекомендации/меры предосторожности
ВниманиеThe thickness of the discs after machining must be greater than the minimum recommended thickness (см. гамму, характеристики тормозные диски)
Machining the discs reduces the thickness of the disc by an average of 0,4 mm, its life-span is therefore reduced
Consequently, the mileage and the replacement period of the discs must be estimated before machining. present this conclusion to the customer and suggest either machining the discs, or replacement of the faulty parts (mileage/year, cost of repair)
ПримечаниеReplacement of the machined discs with new discs may result in the recurrence of vibrations on braking: hub out of true, caliper bracket distorted
Пример: vehicle with 30000 km
Тип диска
- Диаметр 305 mm
- Номинальная толщина: 28 mm
- Минимальная толщина: 26 mm
- Thickness of the disc measured: 27,1 mm
- Wear/mileage relationship: 0,9 mm for 30000 km
- Estimate of thickness after machining: 27,1 - 0,4 = 26,7 mm
- Thickness remaining after machining: 26,7 - 26 = 0,7 mm
Заключение
- Theoretical replacement time диск 0,7 x (30000/0,9) = 23333 Km
- Present this conclusion to the customer and suggest either machining the discs, or replacement of the faulty parts (mileage/year, cost of repair)
Специальный инструмент
Механизм в сборе шлифование тормозные диски SK 8700, включая: [1], [2], [3a], [3b], [4], [5], [6]
[1] drive unit
[2] machining unit
[3a] grinder bracket (голубой цвет)
[3b] grinder bracket (красного цвета)
[4] drive spindle
[5] conical washer
[6] anti-vibration band
Использование инструментов
Установить автомобиль на двухстоечный подъемник
Снять колеса
Measure the effective length (A) of the wheel bolts
Установить на место
- Приспособление [4]
- The wheel bolts (1) fitted with a conical washer [5] to retain the effective length (A)
Затянуть болты (1) моментом 5 дН.м
Вынуть тормозные колодки
Move aside the caliper and suspend it using the hook supplied
ВниманиеDisc of nominal thickness greater than 27 mm: use the [6] anti-vibration band 24 mm wide
ВниманиеFit the anti-vibration band [6] around the disc
Caliper securing fastener without thread
This type of fastening requires tool [3b]
Установить на место
- Приспособление [3b]
- Поставляемые в запчасти болты (2)
Ослабить болты (3)
Tighten the bolts (2) to 5 daN.m after centralising the tool [3b] in relation to the hub
Caliper bracket fastening threaded
This type of fastening requires tool [3a] (голубой цвет)
Установить на место
- Приспособление [3a]
- The vehicle bolts (4); use a spacer if necessary
Ослабить болты (3)
Tighten the bolts (4) to 5 daN.m after centralising the tool [3a] in relation to the hub
Начало производства (продолжение)
Slacken the knurled knob (5)
Move the blades (6) and the grinder as far back as possible
Установить приспособление [2]
Затянуть болты (7) моментом 5 дН.м
Align the mark (B) on the grinder with the centre of the disc
Затянуть болты (3) моментом 3 дН.м
Place the tool [4] horizontal
Position the tool [1] in the centreline of the hub; leave a clearance of 5 mm between tool [4] and tool [1]
Lock the assembly at (C) and (D)
Подсоединить приспособление [2] к приспособлению [1]
Switch on the tool [1]
Select the direction of rotation of the motor in relation to the red arrow (E) located on the tool [2]
Нажать на кнопку ON
Шлифование
Slacken the knurled knob (5)
Move tool [2] manually to bring the blades to the centre of the surface of the disc to be machined
Manually, move the grinder towards the outside of the disc to remove the collar (F)
Manually, move the grinder towards the inside of the disc, to remove the collar (G)
Place the blades at the inside edge of the disc
ВниманиеDo not machine the inner collar (G) of the disc, as this will alter its stiffness
Place the blades at the edge of the collar (G)
Turn the verniers 0,1 mm
Tighten the knurled knob (5)
Press the power supply switches (A)
Repeat the 0,1 mm cutting passes until a completely machined surface is obtained
ПримечаниеFor all manual movements of the grinder, slacken the knurled knob (5)
ВниманиеThe thickness of the disc after machining must be greater than the minimum recommended thickness (refer to the table of brake disc specifications)
When the disc has been machined, move the blades (6) and the grinder as far back as possible
Remove all the equipment
Clean the grinder using a dry brush
Clean the surfaces (H), using a dry brush
Систематически заменять
- Болты тормозного суппорта
- Тормозные колодки
Tightening torque of the caliper bracket bolts: refer to the Brakes brochure, Caliper removal-refitting procedure
Repeat the machining operation on the other disc
Clean the surfaces (I)
Установить на место передние колеса (refer to the Wheel Balancing procedure, Fitting the wheel)
Затянуть колесные болты требуемым моментом