Replacing and Timing Gears of a VOLVO B9R D9B 340 HP

Procedure of Timing and Replacing Gears of a VOLVO B9R Multiaxle / D9B 340 HP :

Casing and Oil Pan Removed

Gear Set :

1. Crankshaft gear

2. Idler gear

3. Idler gear

4. Idler gear

5. Camshaft gear







Special Tools : 9992063, 9992620, 9998511

Other Special Equipment : 1159794, 1159795, 1159912, 1161231, 9999683, 9999696

1. Do not turn the gears during removal as there is a risk that the crankshaft and camshaft positions will be lost.

2. Remove the countershaft. Gear (2), See Fig.

    Note : Lay paper on the floor to protect the gears.

3.

  Remove the two socket bolts on the crankshaft gear. Remove the gear. Gear (1), see Fig. 

  Note : Place a thick washer between the threaded rod and the crankshaft to protect the bolt puller. 

  Other special equipment : 1159912

4. Remove the six bolts from the combined gear set. Remove the gear. Gear set (3), See Fig.

5. Remove the Idler gear. Gear (4), See Fig. 

6. Remove the separate gears and the oscillation damper. Gear (5), See Fig. 

7. 

  Replace the O-ring on the Crankshaft with a new one. 

8. 

Fit the crankshaft gear and tighten the bolts to specifications in group 20. Gear (1), See Fig. 

Note : Lubricate the inside gears with engine oil before assembly. 

Special Tools : 9992620, 9992063

Other Special Equipment : 1159795

9. Fit the upper idler gear and tighten the bolts with low torque (max. 10 Nm). Gear (4), see Fig. 

10. 

Place the idler gear set (3) with hole markings between the two hole markings on the crankshaft gear. Gear (3), see Fig. 

Tighten the bolts to specifications in group 20.

11.

Screw two bolts into the crankshaft so that it can be rotated if necessary.

Special tools : 9998511

12. 

Make sure the camshaft is at the top dead centre. 

13. 

Temporarily put in place the camshaft gear (5) without the oscialltion damper with the hole marked teeth over the hole marks and tighten the bolts with low torque (max. 10 Nm). Gear (5), see Fig.

14. 

Place a dial gauge against the tooth on the camshaft gear. Gear (5), See fig. Turn the gear to and fro while blocking the idler gear (4). Gear (4), see Fig. 

Compare the result with the blacklash specified in service information

Special Tools : 9999683, 9999696

15. 

If the backlash must be adjusted, undo the bolts. Place a 0.1 mm feeler gauge on the pressure side. Tighten the bolts and check the backlash as described in step 14. 

Note : Do not torque tighten.

16. If the reading is incorrect, repeat steps 14 and 15. 

17. Fit the camshaft gear (5) together with the oscillation damper and tighten the bolts to specifications in group 20. 

Note : Make sure they retain the same position (marking, see step 13)

18. Tighten the bolts on the upper idler gear (4) as specified in group 20. 

Other special equipment : 1159794

19. 

Apply an even bed of sealant around the fastening holes on the lower idler gear. 

20. Fit the idler gear. Gear (2), see fig.