Yanmar 6LY3 series - Camshaft and Gear Train; Idler Gear Shaft and Bushing

SERVICE STANDARDS
Service Standards
12/05
6LY3 Service Manual
14-5
© 2007 Yanmar Marine International
Camshaft and Gear Train
Camshaft
Idler Gear Shaft and Bushing
Gear Train Backlash
Inspection Item Standard Limit Reference Page
Side Clearance
0.05-0.20 mm
(0.0019-0.0078 in.)
0.29 mm
(0.0114 in.)
5-48
Bending (1/2 the dial gauge reading) —
0.02 mm
(0.0007 in.)
Cam Height
Intake
49.435-49.565 mm
(1.9462-1.9513 in.)
49.185 mm
(1.9364 in.)
5-48
Exhaust
48.135-48.265 mm
(1.8950-1.9 in.)
48.110 mm
(1.8940 in.)
Camshaft and Bearing
Bushing Inside
Diameter
56.980-57.050 mm
(2.2433-2.2460 in.)
57.130 mm
(2.2492 in.)
5-48
Camshaft Outside
Diameter
56.910-59.940 mm
(2.2405-2.3598 in.)
56.880 mm
(2.2393 in.)
Clearance
0.040-0.130 mm
(0.0015-0.0051 in.)
0.240 mm
(0.0094 in.)
Inspection Item Standard Limit Reference Page
Idle Shaft Diameter
53.950-53.975 mm
(2.1240-2.1249 in.)
53.88 mm
(2.1212 in.)
5-51Idler Gear Bushing Inside Diameter
54.000-54.025 mm
(2.1259-2.1269 in.)
54.08 mm
(2.1291 in.)
Oil Clearance
0.025-0.075 mm
(0.0009-0.0029 in.)
0.15 mm
(0.0059 in.)
Inspection Item Standard Limit Reference Page
Gear Train Backlash
0.08-0.16 mm
(0.0031-0.0062 in.)
0.25 mm
(0.0098 in.)
5-51