Kubota V3300-E2B Workshop Manual page 121

V3300-E2B, V3300-T-E2B, WSM
Valve Recessing
1. Clean the cylinder head, the valve face and seat.
2. Insert the valve into the valve guide.
3. Measure the valve recessing with a depth gauge.
4. If the measurement exceeds the allowable limit, replace the
valve.
If it still exceeds the allowable limit after replacing the valve,
replace the cylinder head.
Factory
spec.
Valve recessing
Allowable
limit
(1) Cylinder Head Surface
Valve Lapping
1. Apply compound evenly to the valve lapping surface.
2. Insert the valve into the valve guide. Lap the valve onto its seat
with a valve flapper or screwdriver.
3. After lapping the valve, wash the compound away and apply oil,
then repeat valve lapping with oil.
4. Apply prussian blue to the contact surface to check the seated
rate. If it is less than 70 %, repeat valve lapping again.
IMPORTANT
• When valve lapping is performed, be sure to check the valve
recessing and adjust the valve clearance after assembling
the valve.
(1) Correct
(2) Incorrect
S-58
DIESEL ENGINE
(Protrusion)
Intake 0 mm (0 in.) to
valve (recessing)
0.2 mm (0.0079 in.)
(Protrusion)
Exhaust 0.15 mm (0.0059 in.) to
valve (recessing)
0.05 mm (0.0019 in.)
(recessing)
0.4 mm (0.0157 in.)
(A) Recessing
(B) Protrusion
W1061543
(3) Incorrect
W1061709
KiSC issued 06, 2006 A