Yanmar 3YM30, Sevice Manual

Page: 218 / 224

13. Service standards
203
(5) Tappet and push rod
13.2.2 Camshaft and gear train
(1) Camshaft
(2) Idle gear shaft and bushing
(3) Backlash of each gear
mm
Inspection item Standard Limit
Reference
page
Tappet outside diameter 20.927-20.960 20.907
5.6.2(2) Tappet guide hole inside diameter (cylinder block) 21.000-21.021 21.041
Tappet oil clearance 0.040-0.094 0.134
Push rod bend Less than 0.03 0.03 5.6.2(3)
mm
Inspection item Standard Limit
Reference
page
Side gap 0.05-0.15 0.25 5.6.1(1)
Bending (1/2 the dial gage reading) 0.02 or less 0.05 5.6.1(4)
Cam height 34.135-34.265 33.89 5.6.1(2)
Shaft outside diameter / Metal inside diameter
Gear side
Bushing inside diameter 40.000-40.075 40.150
5.6.1(3)
Camshaft outside
diameter
39.940-39.960 39.905
Clearance 0.040-0.135 0.245
Intermediate
Bushing inside diameter 40.000-40.025 40.100
Camshaft outside
diameter
39.910-39.935 39.875
Clearance 0.065-0.115 0.225
Flywheel side
Bushing inside diameter 40.000-40.025 40.100
Camshaft outside
diameter
39.940-39.960 39.905
Clearance 0.04-0.085 0.195
mm
Inspection item Standard Limit
Reference
page
Shaft outside diameter 44.950-44.975 44.900
5.7.1(3) Bushing inside diameter 45.000-45.025 45.075
Clearance 0.025-0.075 0.150
mm
Inspection item Standard Limit
Reference
page
Crank gear, cam gear, idle gear and fuel injection
pump gear
0.06-0.12 0.14 5.7.1(1)