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A3.19
Checking service brakes for wear
Checking service brakes for wear
At the intervals indicated in the Maintenance Schedule, check the state of wear of the brake pads and discs.
Remove the wheels (
D2.01
).
Remove all.
The front brake pads are fitted with a wear indicator connected to the brake failure warning light on the
instrument panel. Should this warning light illuminate, check the thickness of the pads and the state of the
braking surfaces on the discs.
In the event of excessive wear, even of just one pad, replace all the pads on the axle.
Checking and inspecting the brake discs
The brake discs must be perfectly clean, free of any oil, grease or rust, and must not be excessively scored.
In the event of poor braking performance not attributable to the state of the brake pads and callipers, carry out a
series of dimensional checks on the discs.
Using a dial gauge, measure the planarity with the disc fitted on the wheel hub.
Using a micrometer, measure the parallelism between the contact surfaces and the pads at different points on
the braking surface.
Using the special tool, check the roughness of the pad contact surface.
The rear discs differ from the front discs in that they have two additional holes to enable access to the brake
shoe adjustment pin without removing the disc.
They also have a large friction surface on the inner side for the parking brake.
Checking CCM brake disc wear
This operation includes:
visually inspecting for alterations in the brake disc friction surface;
checking the minimum brake disc thickness (maximum permitted wear
0.5 mm
);
checking the brake disc edges for damage (damage caused by improper use).
The brake discs must be replaced if:
there are significant alterations in the friction surface;
the brake discs are worn beyond the minimum required thickness (material abraded).
Normally, both forms of brake disc wear occur simultaneously. Only rarely, following prolonged stress on the
race track with large temperature variations on the friction surface, surface alteration may become so
pronounced as to necessitate earlier replacement of the brake discs.
Page 1 of 6
Checking service brakes for wear
8/5/2011
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Summary of Contents for 458 Italia
Page 1: ......
Page 24: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 25: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 26: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 27: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 28: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 29: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 30: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 31: ...1 7 Car Bench vehicle bench Copyright 2010 ...
Page 522: ...Hook 95977564 AS 107564 for lifting the gearbox Page 5 of 5 Specific tooling and equipment ...
Page 586: ...In preparation Page 6 of 6 Engine overhaul Disassembly ...
Page 620: ...Perform the Fuel tank tightness test cycle Page 4 of 4 Fuel level sensor ...
Page 967: ...Refit the wheels D2 01 Page 10 of 10 Stabiliser bars Tie rods ...
Page 1127: ...Refit the wheels D2 01 Page 8 of 8 Wheelhouse ...
Page 1167: ...Prise out and remove the plug 4 Undo the nut 5 Undo the nut 6 Page 32 of 37 Doors ...
Page 1242: ...In the LOWEST position two movements are possible Page 8 of 12 Seats ...
Page 1243: ...In the INTERMEDIATE LOW position three movements are possible Page 9 of 12 Seats ...
Page 1244: ...In the INTERMEDIATE HIGH position three movements are possible Page 10 of 12 Seats ...
Page 1549: ...Reconnect the battery F2 01 Page 5 of 5 Starter motor ...
Page 1721: ...Charge the air conditioning system F5 12 Page 5 of 5 Condenser ...
Page 1740: ...Refit Page 13 of 13 A C unit ...
Page 1764: ...FD0001 Fuel supply distribution 0 99999 Page 10 of 56 PDF ...
Page 1765: ...FD0001 Fuel supply distribution 0 99999 Page 11 of 56 PDF ...
Page 1773: ...FD0001 Fuel supply distribution 0 99999 Page 19 of 56 PDF ...
Page 1774: ...FD0001 Fuel supply distribution 0 99999 Page 20 of 56 PDF ...
Page 1781: ...FD0001 Fuel supply distribution 0 99999 Page 27 of 56 PDF ...
Page 1782: ...FD0001 Fuel supply distribution 0 99999 Page 28 of 56 PDF ...
Page 1789: ...FD0001 Fuel supply distribution 0 99999 Page 35 of 56 PDF ...
Page 1790: ...FD0001 Fuel supply distribution 0 99999 Page 36 of 56 PDF ...
Page 1797: ...FD0001 Fuel supply distribution 0 99999 Page 43 of 56 PDF ...
Page 1798: ...FD0001 Fuel supply distribution 0 99999 Page 44 of 56 PDF ...
Page 1803: ...FD0001 Fuel supply distribution 0 99999 Page 49 of 56 PDF ...
Page 1804: ...FD0001 Fuel supply distribution 0 99999 Page 50 of 56 PDF ...
Page 1809: ...FD0001 Fuel supply distribution 0 99999 Page 55 of 56 PDF ...