Yanmar 4JH4E - Camshaft and Gear Train

13. Service standards
321
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
Side gap 0.05-0.20 0.35 5.6.1(1)
Bending (1/2 the dial gage reading) 0.02 or less 0.05 5.6.1(4)
Cam height
3JH4E/ 4JH4E 38.600-38.800 38.350
5.6.1(2)
4JH4-TE/ 4JH4-HTE 39.800-40.000 39.550
Shaft outside diameter / Metal inside diameter
Gear side
Bushing inside diameter 44.990-45.055 45.130
5.6.1(3)
Camshaft outside
diameter
44.925-44.950 44.890
Clearance 0.040-0.130 0.240
Intermediate
Bushing inside diameter 45.000-45.025 45.100
Camshaft outside
diameter
44.910-44.935 44.875
Clearance 0.065-0.115 0.225
Flywheel side
Bushing inside diameter 45.000-45.025 45.100
Camshaft outside
diameter
44.925-44.950 44.890
Clearance 0.050-0.100 0.210
mm
Inspection item Standard Limit Reference page
Shaft outside diameter 45.950-45.975 45.880
5.7.1(3)Bushing inside diameter 46.000-46.025 46.075
Clearance 0.025-0.075 0.150
mm
Inspection item Standard Limit Reference page
Crank gear, cam gear, idle gear,
fuel injection pump gear and seawater pump gear
0.07-0.15 0.17 5.7.1(2)