Moto Guzzi V85 TT - Service manual > Disc Inspection

FRONT

CAUTION THE FRONT BRAKE DISC SHAPE DOES NOT CHANGE THE OPERATING AND MAINTENANCE SPECIFICATIONS OF THE SYSTEM.

• The following operations must be carried out with the brake discs fitted on the wheel; they refer to a single disc, but are valid for both.
• Check the disc for wear by measuring the minimum thickness with a micrometer in different points. If the minimum thickness, even in a single point of the disc, is less than the minimum value, replace the disc.

Disc thickness minimum value: 4 mm (0.16 in)

• Using a dial gauge, check that the maximum oscillation of the disc does not exceed the tolerance; otherwise, replace it.

Disc oscillation tolerance: 0.15 mm (0.0059 in), with respect to the wheel centre line.

Removal

The following procedure is described for a single calliper, but is valid for both front brake callipers.

• Unscrew and remove the screws (1)

• Remove the front brake calliper (2) from the brake disc

• Remove the two retaining springs (3)

• Remove the two pins (4)

• Remove the spring (5)

• Remove the brake pads (6) one at a time

CAUTION AFTER REMOVING THE PADS, DO NOT OPERATE THE BRAKE LEVER OR THE CALLIPER PLUNGERS COULD GO OUT OF THEIR SEATS RESULTING IN BRAKE FLUID LEAKAGE.

Installing

The following procedure is described for a single calliper, but is valid for both front brake callipers

• Insert the new pads correctly (1)

CAUTION ALWAYS REPLACE BOTH PADS AND MAKE SURE THEY ARE CORRECTLY POSITIONED INSIDE THE CALLIPER.

• Insert the spring (2)

• Insert the two pins (3)

• Insert the two retaining springs (4)

• Insert the front brake calliper (5) on the brake disc

• Insert the two screws (6) and tighten them

• Insert the front brake calliper (5) on the brake disc

• Insert the two screws (6) and tighten them

Removal

• Connect the bleeder bottles to the calliper bleeder screw and open
• Press the lever down as far as it will go and block it in position using a clamping device in order to prevent the liquid from escaping from the system when it is open.
• Close the calliper bleeder screw and remove the bleeder bottle.
• Loosen the two grub screws (1)

• Free the brake calliper line from the cable grommet (2)

• Unscrew and remove the two screws (3)

• Remove the rear brake calliper (4) from the brake disc

• Unscrew and remove the two grub screws (5).

• Remove the brake pads (6) one at a time

CAUTION AFTER REMOVING THE PADS, DO NOT OPERATE THE BRAKE LEVER OR THE CALLIPER PLUNGERS COULD GO OUT OF THEIR SEATS RESULTING IN BRAKE FLUID LEAKAGE.

Installing

• Insert the new pads correctly (1)

CAUTION ALWAYS REPLACE BOTH PADS AND MAKE SURE THEY ARE CORRECTLY POSITIONED INSIDE THE CALLIPER.

• Insert and tighten the grub screws (2)

• Insert the rear brake calliper (3) on the brake disc

• Insert and tighten the screws (4)

• Insert the brake calliper line into the cable grommet (5)

• Tighten the two grub screws (2)

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