New Holland CX720 Repair Manual page 1771

Flywheel - Install (B.10.A.50 - F.10.A.15)
CX720, CX740, CX760, CX780, CX820, CX840
1. Inspect the flywheel ring gear, and if damaged renew
in the following manner,
Cut old ring gear free from the flywheel.
Clean the mating surfaces of the new ring gear, and
flywheel.
Use temperature indicating crayons to mark the side
face of the ring gear in six equal places, mark with
a 204 °C (400 °F) crayon at a point 13 mm (0.5 in)
below the root of the teeth, and mark with a 212 °C (
450 °) crayon at a point just below root of the teeth.
Use an oxy-acetylene torch with a tip size of No.2
maximum, and direct the flame against the internal
face of the gear.
Quickly place the hot gear on the flywheel, with flat
face against the shoulder on the flywheel. The gear
to flywheel runout should be checked using a dial in-
dicator and should not exceed a Total Indicator Read-
ing of 0.63 mm (0.025 in).
Installation
Clean the crankshaft rear flange and mating surface
of the flywheel. Install the flywheel, torquing the bolts
to, 197 Nm (145 ft. lb.).
POWER PRODUCTION - ENGINE
2 4/7/2006
B.10.A / 225
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