DCE80-100E
Technical Handbook
Engine Cummins QSB 5.9
Service
46
P.Group 30
TDCE01
04GB
Checking and adjusting the valve clearances
N.B. Never attempt to check the valve clearances when the
engine is running. The engine must be stationary and the
temperature below 60°C.
1. Remove valve cover.
Crankshaft position 1
2. Using the barring tool, rotate the crankshaft to algin the top
dead center marks on the gear cover and fuel pump gear
With the engine in this position, valve clearanc can be
checked on following valves: 1I, 1E, 2I, 3E, 4I and 5E.
3. Adjust the valve clearances according to the nominal specifi-
cations.
Inlet valve: 0,25 mm
Exhaust valve: 0,50 mm
4. Tighten the lock nut with 24 Nm. Re-check the clearance with
a feeler guge.
5. Make a chalk mark on every adjusted valve.
Crankshaft position 2
6. Rotate the crank shaft another turn (360°)
7. Adjust the valve clearances according for valves 2E, 3I, 4E,
5I, 6I and 6E.
8. Inspect the valve cover gasket for cracks or other damage. Fit
the gasket, replace with a new gasket if needed..
9. Fit the valve cover and tighten the cover screws with 12 Nm.
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