Smart Shoe, model R-141 used for disc
PROCEDURE FOR MEASURING BRAKE PAD FORCE
1.1 With the brakes released, use a pry bar to push the brake pad away from
the brake disc to create at least 1/2 inch of clearance.
1.2 Activate the slack adjuster if additional clearance is required.
1.3 Inspect the pad and disc for wear. If the disc is light hollow worn,
then choose the location of the sensor where the rods contact properly the disc
(on the mid and upper area of the rod). If the disc hollow is too deep, choose
other location for the sensor.
1.4 Carefully observe applicable safety
2.1 For your safety, insert two brake pad-stops between brake pad and disc
with the magnets facing the disc.
2.2 Use provided handle to carefully slide the sensor between the brake pad
2.3 Make certain that the wing (two metallic plates connected to a rubber
bridge) of the sensor is facing the brake pad.
2.4 Align the sensor with the brake pad two axes. Ensure that the sensor
wing is fully resting on the brake pad. Use provided handle to slide the sensor
2.5 To avoid exposing the sensor to excessive shocks, make sure there is
almost no clearance left between brake pad and sensor wing.
2.6 The 4-magnet support strength will keep the sensor securely in place
for several release/apply brake operations.
2.7 Remove both safety pad-stops.
3.1 Turn ON the indicator and wait a few seconds for zero display
3.2 Warm up the sensor and the braking system by performing at least three
full service brake applications after the sensor was installed.
3.3 With full service applied, check the contact between the pad and sensor.
Make sure no pad section other than the wing metallic plate area is in intimate
contact with the sensor.
3.4 Release the brakes and check the pad for deep marks or dents over the
area where the wing contact actually occurred. If the wing protrudes the pad
deeper than the plate thickness (3 mm) then the pad is too soft for this test
and must be replaced or removed.
3.5 Perform minimum three brake applications allowing the time to stabilize
3.6 Read the Brake Pad Force directly in Pounds (lb) or daN and
fill-in the appropriate log sheet. The mean value of minimum three brake
applications should be reported as test result.
3.7 Before halting the test, inspect again the pad-sensor contact area.
Make sure that no deep marks are on the pads.
3.8 Disregard the test results if deep marks are found.
3.9 Once testing is completed, make sure there are no forces on the sensor
and, using the cable, slide it outward and remove it.
3.10 Turn Off the Indicator.