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Charging with air from an external compressed air source
Always use the test nipple on the air drier. Charging
with air in any other way may allow moisture to enter
into the system.
The test nipple and the air drier are located in the
wheel housing on the passenger side.
Brake lining
Each brake caliper is fitted with an electric wear
sensor that shows the average thickness of both brake
linings. A yellow warning lamp will come on and an
error code will be set when only 20% of the brake
linings is remaining. The brake pads must then be
replaced. Brake lining wear can also be read using the
wear pin on the brake caliper. The line on the
measuring pin indicates the amount of outer brake
lining that is left. The marks correspond to 25, 50, 75
and 100 percent of lining thickness. When the linings
are new, 20 mm of the wear pin is visible. When 4 mm
of the wear pin is visible then the lining is
approximately 4 mm thick; worn out. Replace brake
pads on both wheels on the same axle at the same
time. The electric wear sensor must be recalibrated at a
Volvo garage after the brake pads have been changed.
Maintenance 577
Tilt the cab to access the test nipple.
J0010459
J5011012
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