D439E Service Manual 2. Engine Mechanical System (D439E)
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5. Apply the compound evenly over the valve seat
surface (1).
CAUTION
a. Valve stem (2) should be free from any
compound. Use the medium mesh (mesh
between 120 and 150) compound at first and
finish the grinding with the fine mesh
compound (above 200 mesh)
b. Mix the compound with some engine oil to
apply evenly.
6. Place the valve on the valve seat using the valve
lapper (1). Tap the valve with turning the valve
slightly. Clean the compound with diesel or
equivalent. Apply the engine oil and check
whether the contact surface is securely positioned.
Reassembly
Rocker and rocker shaft assembly
1. Install rocker shaft bracket No. 1, 2, 3 and 4 to the
rocker shaft.
2. Install the rocker shaft spring.
3. Apply engine oil on the rocker bush, and then
install the bush to the rocker.
4. Install the rocker assembly.
5. Install the front and rear rocker shaft bracket.
6. Install the front and rear rocker shaft bracket set
bolts.
Tightening torque : 7.8 ~ 11.8 Nm
(0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 Ib-ft)
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