Doosan D35S-5 Service Manual page 66

NOTE : If the max protrusion of the piston is 0.05
mm more than average protrusion, then use the
grade up (A→B) gasket.
3. Checking and adjusting of valve clearance
NOTE : Check and adjust valve clearance while the
engine is cold.
1) Crank the engine with the cranking handle and
align the needle to "0" position of crankshaft
damper pulley (side marked with No. 1 through
4). Or align it to the "0" position of crankshaft
damper pulley (side marked No. 2 to 3). (This is
at the TDC of comopression stroke of cylinder
No.1).
D439E Service Manual
2) At the TDC of compression stroke of cylinder
No. 1, check and adjust the clearance of the
valve with "O" mark at the following table. And
then, turn the crankshaft in one turn to check
and adjust the valve clearance of remaining
valves with "X" mark.
Cylin
der 1
No.
Int Ex
Valve ak ha
e ust
TDC
of O O
No.1
TDC
of
No.4
3) Measure the clearance between rocker and
valve cap using the thickness gauge.
a. If the valve clearance exceeds the reference
value, loosen the lock nut (2) and adjust the
clearance with thickness gauge by turning the
adjusting screws.
b. After the valve clearance adjustment, fix the
adjusting screw using the screw drive (3) and
fasten the loc아 nut securely.
NOTE : Make sure to check whether the valve
clearance satisfies the reference after valve
clearance adjustment.
64 2. Engine Mechanical System (D439E)
2 3
Int Ex Int Ex
ak ha ak ha
e ust e ust
O O
X X
4
Int Ex
ak ha
e ust
X X