Kubota V3600-E3 Shop Manual page 184

V3-E3B SERIES, V3-E3CB SERIES, V3-E3BG SERIES, WSM
Correcting Valve and Valve Seat
NOTE
• Before correcting the valve and seat, check the valve stem
and the I.D. of valve guide section, and repair them if
necessary.
• After correcting the valve seat, be sure to check the valve
recessing.
1) Correcting Valve
1. Correct the valve with a valve refacer.
Factory
Valve face angle
spec.
2) Correcting Valve Seat
1. Slightly correct the seat surface with a 1.0 rad (60 °) (intake
valve) or 0.79 rad (45 °) (exhaust valve) valve seat cutter.
2. Resurface the seat surface with a 0.52 rad (30 °) valve seat cutter
to intake valve seat and with a 0.26 rad (15 °) valve seat cutter to
exhaust valve seat so that the width is close to specified valve
seat width.
[V3600-E3B, V3600-T-E3B, V3600-E3CB, V3600-T-E3CB,
V3300-E3BG, V3600-T-E3BG]
Factory
Valve seat width
spec.
[V3800DI-T-E3B, V3800DI-T-E3CB, V3800DI-T-E3BG]
Factory
Valve seat width
spec.
3. After resurfacing the seat, do the valve lapping.
(See the "Valve Lapping")
Factory
Valve seat angle
spec.
(1) Valve Seat Width
(2) Identical Dimensions
S-92
DIESEL ENGINE
1.0 rad
IN.
60 °
0.79 rad
EX.
45 °
2.12 mm
IN.
0.0835 in.
2.12 mm
EX.
0.0835 in.
1.6 to 2.0 mm
IN.
0.063 to 0.078 in.
2.3 to 2.6 mm
EX.
0.091 to 0.10 in.
1.0 rad
IN.
60 °
0.79 rad
EX.
45 °
(A) Check Contact
(B) Correct Seat Width
(C) Check Contact
(a) 0.26 rad (15 °) or 0.52 rad (30 °)
(b) 0.79 rad (45 °) or 1.0 rad (60 °)
(c) 0.52 rad (30 °) or 0.26 rad (15 °)
W10283500