AMMCO 800 On-The-Vehicle Brake Lathe - Manual (Page 18)

12 • AMMCO 800 On-The-Vehicle Brake Lathe
O On n- -T Th he e- -V Ve eh hiic clle e
Brake Rotor Inspection
7.0 Before attempting any resurfacing, rotor
inspection is necessary. Determine the manufac-
turer’s rotor specifications from an approved specifi-
cation guide.
7.1 Using an AMMCO ® model 2780 digital microm-
eter (p/n 902780) or other rotor-measuring tool, record
the thickness of the rotor. Observe any deep scores
and gouges, as this depth will also need to be
recorded.
7.2 Attach a dial indicator to the vehicle and record
the rotor runout. Refer to DIAL INDICATOR ASSEM-
BLY AND SET UP on page 10.
7.3 Determine if the total amount of material to be
removed will meet the manufacturer’s minimum spec-
ifications, if not a new rotor will be required. In all
cases, a new rotor must be inspected for runout and
sometimes resurfaced to meet manufacturer’s speci-
fications.
Note: Be aware that all vehicle manufacturers have a
minimum “machine to” and a “discard” thickness.