Valve Spring Inspection - Doosan DL06 Manual

< Valve depression >
Intake
(A)
Exhaust
(A)
< Valve angle >
Intake valve (B)
It is necessary to work boring of
inner diameter of it when
replace the valve seat.
Apply valve lapping compound
to the valve head seating face
on the valve seat and lap the
valve seat by turning it until it is
seated in position, then wipe
out the lapping compound.
4) Valve spring
Visual check
Check the appearance of valve
spring and if necessary replace
the spring.
Valve spring free length
Use a vernier caliper to measure the valve spring free length.
If the measured value is less
than the specified limit, the
valve spring must be replaced.
DL06 Diesel Engine
Standard Limit
0.35 ∼ 0.65 mm
0.85 mm
0.35 ∼ 0.65 mm
0.85 mm
Exhaust valve (B)
O O
60 45
74
Disassembly and Reassembly of Major Components
Valve
Valve seat