Check Of Valve Shaft Projecting Length; Cleaning, Check And Setting Of Spark Plugs - LIMBACH L 2400 EF Operating And Maintenance Manual

8.9

Check of Valve Shaft Projecting Length

Remove cylinder head covers.
Dismount rocker arm shafts.
Measurement of valve shaft projecting length by means of measuring device P/N: 803.001.130.
If the projecting length is less than 24 mm for the intake and exhaust valve the cylinder heads
have to be replaced by new ones.
Caution:
If the measurement is within limits, however the valve measured is less than 24.5
mm, the projecting length of the valve shafts has to be checked every 100 hours.
Install rocker arm shafts.
•
Position rocker arm shaft assemblies on the studs in the cylinder head.
•
Seat the pushrods in the sockets of the rocker arms.
•
Pre-assemble spring washers and M8 nuts (strength class 10)
•
Ensure that the pushrods are also seated in the camshaft followers.
•
Torque nuts to 25 Nm
Note:
Turning the pushrods while tightening the bolts will prevent the pushrods from becoming
unseated at the cam followers.
Caution:
An unseated pushrod may cause power loss and/or subsequent
engine damage.
Check valve clearance and readjust, if necessary.
Mount cylinder head cover.
Check gaskets and replace as necessary.

8.10 Cleaning, Check and Setting of Spark Plugs

Removal of spark plugs.
Disconnect spark plug connectors.
Caution:
Do not unscrew spark plugs when the engine is hot.
Cleaning of spark plugs.
Clean spark plugs by means of a plastic brush in a degreasing solution. Do not use a
steel or brass brush for cleaning. Do not sandblast spark plugs.
Check electrode gap and adjust, if necessary.
Check electrode gap by means of a thickness gauge and adjust it by bending the
ground electrode.
Edition: 20.06.2018
Operating Manual
L 2400 EF/DF/ET/DT/DX/DS
Page: 35/53