Parking Brake Shoe: Testing and Inspection

Drum Inspection:

^ Measure inside diameter with drum micrometer.
^ Check for cracks, scores, "Bell Shape", out-of-round and hot spots.
^ Check brake shoes for cracks, scores, fit to drum and thickness.

SPECIFICATIONS
Standard drum inner diameter: 190.0 mm (7.48 in)
Maximum drum inner diameter (Repair limit): 191.0 mm (7.52 in)
Out-of-round measurement: 0.04 mm (0.0016 in)
Runout measurement: 0.1 mm (0.004 in.)
Minimum brake shoe lining thickness: 1.5 mm (0.050 in)