3208 INDUSTRIAL ENGINE ATTACHMENTS – Mounting Group For AT540, MT643, And MT653 Allison Transmissi

(1) Maximum face runout of flexplate measured at bolt circle diameter … 0.76 mm (.030 in)

(2) Bore runout of spacer TIR.

(Total indicator reading)

AT540 … 0.51 mm (.020 in)

MT643, MT653 … 0.20 mm (.008 in)

(3) Face runout of spacer TIR.

(Total indicator reading)

AT540 … 0.51 mm (.020 in)

MT643, MT653 … 0.20 mm (.008 in)

(4) Torque for bolts that hold flywheel and adapter to crankshaft … 90 ± 7 N·m (66 ± 5 lb ft)

(5) Bore runout of adapter TIR.

(Total indicator reading)

AT540 … 0.25 mm (.010 in)

MT643, MT653 … 0.13 mm (.005 in)

(6) Face runout of adapter with flex plate installed [measured 76.2 mm (3.00 in) from center of bore] (Total indicator reading) … 0.08 mm (.003 in)