Set basic position of camshafts

AR05.20-S-6020EF

Set basic position of camshafts

19.05.2020

Model

447 with engine 622

Modification notes

19.05.2020

Method revised.

The whole document

1

Hole

4

Bolts

7

Hole

2

Spring

5

Groove

12

Screw plug

3

Intake camshaft gear

6

Hole

Shown on camshafts in preadjustment

8

Cylinder head cover

9

Exhaust camshaft gear

10

Hole

11

Hole

 Warning

Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.

No parts of the body or limbs should be within the operating area of mechanical components when moving components.

AS00.00-Z-0009-01A

 Caution

Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil

Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.

AS18.00-Z-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A



Remove

1

Remove starter.

AR15.30-S-7100EF

2

Remove the timing case cover.

AR01.40-S-8000EF

Preparatory tasks

3

Attach belt pulley.

AR03.30-S-1700EF

 For this purpose, attach belt pulley to crankshaft using old bolt.

 Do not replace bolt.
Do not tighten bolt.

4

Adjust camshafts to preadjustment.

 For this purpose, turn crankshaft in direction of engine rotation.
Align bore (10) at exhaust camshaft gear (9) with bore (11) at cylinder head cover (8).

5

Remove screw plug (12) from crankcase.

6

Screw drift into bore at crankcase.

 Drift

*626589001500

7

Turn engine at crankshaft in direction of engine rotation until crankshaft is in contact with drift.

 Drift

*626589001500

Adjust

8

Insert suitable locking drift (Ø 4 mm) into bore (1) and press together spring (2) of intake camshaft gear (3).


Via use of locking drift, intake camshaft gear (3) is locked. It must only be removed and installed in this condition. Lock must not be removed during this time.
Otherwise, intake camshaft gear (3) can subsequently be damaged when engine is running.

 The gear backlash play compensation is relaxed in this way.

9

Engage the chain tensioner.

AR05.10-S-7800EF

 Do not remove chain tensioner.

10

Loosen screws (4).

11

Insert wedge of adjusting tool in groove (5).

 Adjustment tool

*626589044000

12

Align bore with attached spacer sleeve at adjusting tool with bore (6) at cylinder head cover (8).

 For this purpose, turn exhaust camshaft with  adjustment tool.

 Adjustment tool

*626589044000

13

Turn intake camshaft gearwheel (3) until the pins of the adjustment tool engage in the bores (7) on the intake camshaft gearwheel (3).

 Adjustment tool

*626589044000

14

Fix adjusting tool in place.

 To do this screw screw/bolt into the bore (6).

 Adjustment tool

*626589044000

15

Release chain tensioner.

AR05.10-S-7800EF

16

Replace screws (4) in sequence.

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

 Bolt, timing chain sprocket and camshaft sprocket to camshaft

*BA05.10-N-1005-01J

17

Remove locking drift from bore (1) of intake camshaft gear (3).

18

Remove adjustment tool.

 For this purpose, unscrew bolt from bore (6).

 Adjustment tool

*626589044000

19

Check basic position of camshafts.

AR05.20-S-6010EF

 Crank engine at crankshaft in direction of engine rotation.

 Adjustment tool

*626589044000

If the adjusting tool cannot be attached,



Repeat the whole adjustment procedure again.

Concluding tasks

20

Remove drift.

If drift was screwed in.

 Drift

*626589001500

21

Screw screw plug (12) into crankcase.

 Screw plug for bore, special tool TDC to crankcase

*BA01.40-N-1006-01E

22

Remove belt pulley.

AR03.30-S-1700EF



Install

23

Install timing case cover.

AR01.40-S-8000EF

24

Install starter.

AR15.30-S-7100EF

 Crankcase, timing case cover, bottom half of crankcase

Number

Designation

Engine 622 in model 447

BA01.40-N-1006-01E

Screw plug for bore, special tool TDC to crankcase

Nm

25

 Timing chain drive

Number

Designation

Engine 622 in model 447

BA05.10-N-1005-01J

Bolt, timing chain sprocket and camshaft sprocket to camshaft

Stage 1

Nm

10

Stage 2

°

40