Replace ring gear on flywheel

AR03.30-B-8312TJ

Replace ring gear on flywheel

05.11.2019

Engine

924.9, 926.9 in model 958.0/1

Engine

926.9 in model 958.2

1

Rack

2

Flywheel

2.1

Version 443 mm diameter with 362 mm diameter clutch

2.2

Version 403 mm diameter with 362 mm diameter clutch

2.3

Version with 443 mm diameter with 395 mm diameter clutch, or version with a 487 mm diameter and 430 mm diameter clutch

A

Threaded hole (M101.5)

B

Flywheel diameter for insertion of the rack

Seta

Opening with internal hole for the thread (M8)



Remove

1

Remove the steering wheel (2)

.

AR03.30-B-8002TJ

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

2

Quickly heat the rack (1) using a welding torch and extract it from the flywheel using an appropriate mandrel (2)

 Apply a shim to the flywheel (2).

3

Measure the flywheel diameter to install the rack (B) on the flywheel (2)

 If the value is out of tolerance, replace the flywheel (2).

.Ring gear housing diameter

*BE03.30-B-1002-03E



Install

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

4

Heat the new rack (1)

 The correct installation temperature is reached when the rack (1) shows a light yellow quenching color.

.Flywheel ring gear assemblage temperature

*BE03.30-B-1005-04A

5

Place the rack (1) on the flywheel (2) until the supporting surface

 Leave the rack (1) to cool for at least 2 min, then resettle it using a brass punch. The rack (1) must touch the flywheel support shoulder (2) all the way around.

6

Make deeper holes for thread (M8) (arrow) in the ring gear (1)

 Only for the 403 mm diameter version with clutch diameter 362 mm (2.2).
Use a drill with a 6.8 mm diameter.

7

Perform centering of the ring gear (1) through the threaded holes (M101.5) (A)

 Only for the 443 mm diameter version with a 395 mm diameter clutch or for the 487 mm diameter version with a 430 mm diameter clutch (2.3).
Use a drill with a 9.0 mm diameter. The centering holes are used to pre-drill inner holes.

8

Drill the inner drilling for the thread (M10) on the gear ring (1)

 Only for the 443 mm diameter version with a 395 mm diameter clutch or for the 487 mm diameter version with a 430 mm diameter clutch (2.3).
Use a drill with a 4.5 mm diameter.

9

Drill the inner drilling for the thread (M10) on the gear ring (1) at the final measurement

 Only for the 443 mm diameter version with a 395 mm diameter clutch or for the 487 mm diameter version with a 430 mm diameter clutch (2.3).
Use a drill with a 8.5 mm diameter.

10

Turn the flywheel (2) and adjust the inner holes on the rack (1)

 Only for the 443 mm diameter version with a 395 mm diameter clutch or for the 487 mm diameter version with a 430 mm diameter clutch (2.3).

11

Open a thread M10 for all inner drillings on the gear ring (1)

 Only for the 443 mm diameter version with a 395 mm diameter clutch or for the 487 mm diameter version with a 430 mm diameter clutch (2.3).

12

Install the flywheel (2)

Remove/install a flywheel
.

AR03.30-B-8002TJ

Engine flywheel

Number

Designation

Motor 902.9; 904.9, 906.9, 924.9 with Ø 443 flywheel and Ø 395 clutch

Engine 902.9, 906.9, 926.9 with Ø 487 flywheel and Ø 430 clutch

BE03.30-B-1002-03E

Ring gear housing diameter

mm

392,435...392,575

432,490...432,645

Engine flywheel

Number

Designation

Motor 904.9; 924.9 with Ø 403 flywheel and Ø 362 clutch

Motor 902.9, 906.9, 924.9 with Ø 443 flywheel and automatic gearbox

BE03.30-B-1002-03E

Ring gear housing diameter

mm

360,435...360,575

392,435...392,575

Engine flywheel

Number

Designation

Engine 902.9, 904.9, 906.9, 924.9, with Ø 443 flywheel and Spicer clutch

BE03.30-B-1002-03E

Ring gear housing diameter

mm

392,435...392,575

Flywheel ring gear

Number

Designation

Motor 902.9, 904.9, 906.9, 924.9, 926.9 with Ø 443 flywheel and Ø 395 gearbox

Motor 902.9, 906.9, 926.9 with Ø 487 flywheel and Ø 30 gearbox

BE03.30-B-1005-04A

Flywheel ring gear assemblage temperature

C°

250...280

250...280

Flywheel ring gear

Number

Designation

Motor 902.9, 906.9, 926.9 with Ø 443 flywheel and 723.6 gearbox

Motor 902.9, 904.9, 906.9, 924.9 with Ø 443 flywheel and gearbox Spicer

BE03.30-B-1005-04A

Flywheel ring gear assemblage temperature

C°

250...280

250...280