BRAKE SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
SERVICE BRAKE WEAR INDICATOR (EXISTING BRAKE DISC) CHECK - CONTINUED
N OT E
Measure dimension (C) with the service brakes applied. Dimension (C) equals distance from axle housing
flange face to end of pin.
Use caliper to measure exact thickness (D) of gage block.
Gage block is U shaped. Position gage block so slot straddles hole in axle housing flange face (13). Firmly hold gage
block against axle housing flange face.
With assistance, apply service brakes (TM 5-3805-291-10).
Using depth micrometer, measure dimension (E).
N OT E
If gage block is not available, use a depth micrometer with a half of a base to measure dimension (C)
directly from flange face. Shorten the base on the micrometer by grinding. This will help allow the base of
the micrometer to rest on flange face.
Value of dimension (C) equals value of dimension (E) minus value of dimension (D).
Record measurements for each brake that contains a new brake disc.
Record number of service hours shown on service meter unit (SMU).