1997-11:2 © Scania Industrial & Marine Engines 35
24. Every 2,400 hours:
CHECK/ADJUST
VALVE CLEARANCE
Checking/adjusting valve clearance can also be done after the first
400 hours of operation.
Valves should be adjusted when the engine is cold, at least 30 minutes after
operation.
Rocker cover gaskets should be changed as necessary. Tightening torque:
25 Nm.
Alternative 1
- Set No. 1 cylinder to TDC by turning the engine in its direction of rota-
tion until both valves are closed.
- Adjust the following valves. Correct valve clearance is indicated on the
instruction plate on one of the rocker covers:
Cylinder 1 Intake and exhaust
2In
3Ex
4In
5Ex
- Set No. 6 cylinder to TDC by turning the engine one revolution in its
direction of rotation and adjust the following valves:
Cylinder 2 Ex
3In
4Ex
5In
6 In and ex
Covers for reading
on flywheel casing
Note
On silumin casings readings can be
taken either from the top or from
underneath, depending on which
flywheel is used.
The cover not being used is covered
with a seal and an instruction
plate.
On cast iron casings readings can
be taken from either the top or
from the side (60
o
) according to
the accessibility.
FLYWHEEL
TDC
No. 6 cyl
TDC
No. 1 cyl
Intake valve
Exhaust valve
5
4
3
2
1
6
Cylinder numbering
FLYWHEEL
WARNING
Block the starter device
when working on the engine.
If the engine starts out of
control, there is a
SERIOUS RISK OF
INJURY
!
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