Komatsu 4D98 Series Shop Manual page 47

4. ENGINE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . 4-I-4-30
4.1
INTRODUCTION ............................................................... 4-1
4.2 CYLINDER HEAD ............................................................. 4-2
(1) Components .............................................................. 4-2
(2) Disassembly procedure ............................................. 4-2
(3) Reassembly procedure ............................................. 4-3
(4) Servicing points .........................................................
4-3
(5) Parts inspection and measurement ........................... 4-5
(6) Valve seat correction ................................................. 4-8
(7) Valve guide replacement ......................................... 4-10
(8) Valve stem seal replacement ..................................
4-10
4.3
GEAR TRAIN AND CAMSHAFT ..................................... 4-11
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Components ............................................................
4-11
Disassembly procedure ...........................................
4-11
Reassembly procedure ........................................... 4-11
Servicing points ....................................................... 4-12
Parts inspection and measurement.. ....................... 4-l 4
Oil seal replacement ...............................................
4-16
Camshaft bushing replacement ..............................
4-l 6