Remove/install valve springs and/or valve stem seals

AR05.30-S-3500EF

Remove/install valve springs and/or valve stem seals

4.3.15

MODEL

447 with ENGINE 622

01

Counterholder

02

Assembly lever

03

Depressor

1

Cylinder head

2

Valve spring retainer

3

Valve spring

4

Valve keeper

5

Valve

6

Valve stem seal

 

Remove/install

1

Remove hydraulic valve play compensation elements

AR05.00-S-2011EF

2

Crank engine at crankshaft in direction of rotation until piston on cylinder to be machined is positioned at TDC

3

Connect cylinder leakage tester

AR01.00-S-1300EF

4

Pressurize clearance volume to about 5 bar

5

Attach counterholder (01) to cylinder head (1)

 Valve assembly tools kit

*111589256100

6

Mount assembly lever (02) with depressor (03) on counterholder (01) and align

 Place depressor (03) on upper valve spring retainer (2) vertically.

 Valve assembly tools kit

*111589256100

 Depressor

*273589006100

7

Remove valve spring retainer (2) and valve spring (3)


When pressing together the valve spring (3) ensure that the thrust piece (03) does not slip.
This prevents damage.

 To do this compress valve spring (3) and remove valve keepers (4) with a magnetic finger, magnetic pin or tweezers.

 Magnetic finger

*116589066300

 Magnetic pin

*210589004000

8

Replace valve stem seal (6)

AR05.30-S-3500-02E

 Drift

*604589004300

 Pliers

*606589003700

Check surface of valve stems for roughness and ridging. For appropriate findings:



Remove/install valves

AR05.30-S-3511EF



Check

9

Check valve spring retainer (2) for pitting

 Replace valve spring retainer (2) as required.

10

Perform machining of other cylinders in the same way

11

Install in the reverse order