Doosan D20S-7 - Engine Valve Lash (Diesel Engine Only) - Check, Adjust; Inspect Mixer Assembly (GCT K25; G424 P(E) Engine Only); Inspect Throttle Assembly (GCT K25; G424 P(E) Engine Only)

Maintenance Section
-225-
Inspect Mixer Assembly (GCT K25 /
G424P(E) Engine Only)
Refer to the LP mixer section of the engine service
manual for procedures.
Inspect Throttle Assembly
(GCT K25 / G424P(E) Engine Only)
1. Visually inspect the throttle assembly motor
housing for coking, cracks and missing
cover-retaining clips. Repair and/or replace as
necessary.
NOTE: Refer to the LP mixer and throttle section
of the service manual for procedures on
removing the mixer and inspecting the
throttle plate.
Engine Valve Lash (Diesel Engine
Only) - Check, Adjust
NOTICE
The valve clearances are to be adjusted at the
times of the following situations.
 When the engine is overhauled and the cylinder
heads are disassembled.
 When severe noise comes from valve train.
 When the engine is not normally operated even
though there is no trouble in the fuel system.
WARNING
To prevent possible injury when adjusting
diesel engines, do not use the starter motor to
turn the flywheel.
Hot engine components can cause burns. Allow
additional time for the engine to cool before
measuring valve clearance.
NOTICE
Measure the valve lash with the engine stopped. To
obtain an accurate measurement, allow at least 20
minutes to cool the engine cylinder head and block
temperature.
Set the clearance to the nominal appropriate
clearance given in the “Valve Clearance Setting”
shown below.
Valve Clearances
En
g
ine Valve Clearance
2.4 liter
(D24A) Diesel
Exhaust Valves 0.2 mm (.0.08 in)
Intake Valves 0.2 mm (.0.08 in)
Refer to the “Service Manual” for the complete
valve adjustment procedure.