Komatsu 82E Series - Engine Body Service Standards

82E-5 – 98E-5 SERIES 12-3
12. SERVICE STANDARDS
12.2 Engine Body
12.2.1 Cylinder head
(1) Cylinder head
Inspection item Standard Limit Reference page
Combustion surface distortion mm 0.05 or less 0.15
4.2.5.(1)
Valve sink
mm
3D82AE
(2-valve head)
Intake 0.35 – 0.55 0.8
Exhaust 0.30 – 0.50 0.8
3D84E – 4D84E
(2-valve head)
S4D84E (4-valve)
Intake 0.30 – 0.50 0.8
Exhaust 0.30 – 0.50 0.8
4D94LE
(S)4D98E
(4-valve head)
Intake 0.36 – 0.56 0.8
Exhaust 0.35 – 0.55 0.8
Valve seat
(2-valve, 4-valve)
Seat angle Deg.
Intake 120 —
4.2.6.Exhaust 90 —
Seat correction angle deg. 40, 150 —