Check hydraulic valve play compensation elements

AR05.00-P-2012MSA

Check hydraulic valve play compensation elements

09.10.2018

Engine

256.9 in model 213, 238, 257, 290

2

Roller-type cam follower

4

Hydraulic valve play compensation element

 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

 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

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A



Check

1

Check engine oil level and correct.



Engine 256.9 in model 213, 238, 290

AP18.00-P-1812MKI



Engine 256.9 in model 257

AP18.00-P-1812BKI

2

Warm up engine to normal operating temperature.

3

Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).

 

Remove/install

4

Remove camshaft housing.

AR05.20-P-6997MSA



Check

5

Press together hydraulic valve play compensation elements (4); to do this, depress the roller-type rocker arms (2) using a suitable drift.


Do not use a steel tool.
Otherwise, damage to the roller-type rocker arms (2) will occur.

 It must not be possible to press together the hydraulic valve play compensation elements (4) with normal force of the hand and it should be possible to press them together only very slowly when great pressure is applied.

If one hydraulic valve play compensation element (4) lowers too much compared to the others,



Replace corresponding hydraulic valve play compensation element (4).

AR05.00-P-2013MSA

If several hydraulic valve play compensation elements (4) lower,



Check oil pressure.

AR18.00-P-1250MSA

6

Install in the reverse order.