Mounting Group For AT540, MT643, and MT653 Allison Transmission
Usage:
(1) Maximum face runout of flexplate measured at bolt circle diameter ... .030 in.(0.76 mm)
(2) Bore runout of spacer T.I.R.
(Total indicator reading)
AT540 ... .020 in.(0.51 mm)
MT643, MT653 ... .008 in.(0.20 mm)
(3) Face runout of spacer T.I.R.
(Total indicator reading)
AT540 ... .020 in.(0.51 mm)
MT643, MT653 ... .008 in.(0.20 mm)
(4) Torque for bolts that hold flywheel and adapter to crankshaft ... 55 ± 5 lb.ft.(75 ± 7 N·m)
(5) Bore runout of adapter T.I.R.
(Total indicator reading)
AT540 ... .010 in.(0.25 mm)
MT643, MT653 ... .005 in.(0.13 mm)
(6) Face runout of adapter with flex plate installed [measured 3.00 in. (76.2 mm) from center of bore] (Total indicator reading) ... .003 in.(0.08 mm)
Caterpillar Information System:
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