AR03.30-W-8312C | Replace ring gear on flywheel | 13.9.06 |
ENGINE 457.9 in MODEL 374, 375, 940, 942, 943, 944, 958
W03.30-0014-04
1 Ring gear
2 Flywheel
A Bore to receive bolt for clutch pressure plate
B Ring gear inside diameter and flywheel diameter to ring gear mount
| Removing | ||
Danger! | Risk of injury to skin and eyes caused by handling hot or glowing objects. | Wear safety gloves, protective clothing and safety glasses, if necessary. | |
1 | Remove flywheel (2) | ||
2 | Use a welding torch to rapidly heat up ring gear (1) and press it off flywheel (2) using a suitable drift | Put something under the flywheel (2). | |
| Measure | ||
3 | Measure ring gear inside diameter and flywheel diameter for mounting ring gear (B) on flywheel (2) and calculate overlap between ring gear (1) and flywheel (2) | Possibly also replace flywheel (2) or rework diameter of the flywheel (2) to receive ring gear (1) to the next deviation and select a new ring gear (1) with the appropriate deviation. | |
Flywheel dia. | |||
Ring gear inside diameter | |||
Overlap between ring gear and flywheel | |||
| Install | ||
4 | Heat new ring gear (1) | The correct pulling on temperature is reached once the ring gear (1) has a bright yellow annealing color. | |
5 | Lay ring gear (1) onto the flywheel (2) as far as the contact surface | Allow ring gear (1) to cool down for at least 2 minutes and then reposition ring gear (1) using a brass drift. | |
6 | At centerings on ring gear (1) through the bores (A) | Use dia. 11,0 mm drill bit. The centerings are needed to bore out the core bores. | |
7 | Predrill core bores for thread in ring gear (1) | Use dia. 4,5 mm drill bit. | |
8 | Bore out core bores for thread in ring gear (1) to gauge block | Use dia. 8,5 mm drill bit. | |
9 | Turn flywheel (2) and chamfer core bores in ring gear (1) | ||
10 | Cut a thread in all core bores in ring gear (1) | Use a thread cutter (M10). | |
11 | Install flywheel (2) |
Check values for flywheel
Number | Designation | Engine 457.9 | |||
BE03.30-N-1005-03C | Flywheel dia. | for mounting | Standard | mm | 432.490 to 432.645 |
Starter ring gear | Deviation 0.5 | mm | 431.990 to 432.145 | ||
Test and adjustment values for starter ring gear, flywheel
Number | Designation | Engine | |||
BE03.30-N-1001-04G | Ring gear inner dia. | Standard | mm | 432.000 to 432.155 | |
Deviation 0.5 | mm | 431.500 to 431.655 | |||
Permissible radial runout at ring gear seat | mm | 0,5 | |||
Width | mm | 18.25 to 18.75 | |||
Installation temperature | °C | 200 to 230 | |||
BE03.30-N-1002-04G | Overlap between starter ring gear and flywheel | mm | 0.335 to 0.645 | ||