Doosan DX22 - Page 74

5. General Engine Information
68
EPM2031I
8. Flywheel
EA0M4029
1) Heat the ring gear evenly with a gas burner to expand it;
then, use a hammer to install the ring gear on the flywheel.
2) Do not allow the temperature of the ring gear to exceed
200 °C (392 °F).
EA6M2004
3) Use an assembly jig to press fit the wear ring into the
back of the flywheel so that the flywheel is aligned with
the edge of the wear ring. (Apply Loctite #262 to the
mounting surface)
EDX22190116
EDX22190117
4) Install the flywheel assembly guide bolts on the crank-
shaft.
5) Fit the flywheel onto the guide bolts and temporarily
tighten the mounting bolts 2 ~ 3 threads; then, tighten the
bolts to a torque of 20 kgf·m (144.66 lbf·ft) in the order of
assembly.
6) After tightening the bolts again at an angle of 90° in the
order of assembly, tighten them again at 90° in the order
of assembly; finally, tighten them at 55° in order.
Sensor & target wheel air
gap
1.0 ±0.5 mm
(0.0394 ±0.0197 in.)
Allowable
tightening range
Flywheel
housing
Wear ring Ring gear
Torque
20 kgf·m (144.66 lbf·ft)
+ 90° + 90° + 55°
1
1
8
8
3
3
5
5
2
2
7
7
4
4
6
6
9
9