Camshaft And Timing Gear Train Specifications; Camshaft; Idler Gear Shaft And Bushing; Timing Gear Backlash - Yanmar 3TNV88F Service Manual

ENGINE

CAMSHAFT AND TIMING GEAR TRAIN SPECIFICATIONS

Camshaft

Inspection item
End play
Bend (1/2 the dial gauge reading)
Cam lobe height
Gear end
Shaft outside
diameter/bearing Interme-
inside diameter diate
Flywheel
end

Idler Gear Shaft and Bushing

Inspection item
Shaft outside diameter
Bushing inside diameter
Oil clearance

Timing Gear Backlash

Inspection item
Crank gear, cam gear, idler gear, fuel injection
pump gear and PTO gear
6-6
Camshaft and Timing Gear Train Specifications
Standard
0.0020 - 0.0079 in.
(0.05 - 0.20 mm)
0 - 0.0008 in.
(0 - 0.02 mm)
1.5197 - 1.5276 in.
(38.600 - 38.800 mm)
Bushing
1.7713 - 1.7738 in.
inside
(44.990 - 45.055 mm)
diameter
Camshaft
1.7687 - 1.7697 in.
outside
(44.925 - 44.950 mm)
diameter
0.0016 - 0.0051 in.
Oil clearance
(0.040 - 0.130 mm)
Bore inside 1.7716 - 1.7726 in.
diameter (45.000 - 45.025 mm)
Camshaft
1.7681 - 1.7691 in.
outside
(44.910 - 44.935 mm)
diameter
0.0026 - 0.0045 in.
Oil clearance
(0.065 - 0.115 mm)
Bore inside 1.7716 - 1.7726 in.
diameter (45.000 - 45.025 mm)
Camshaft
1.7687 - 1.7697 in.
outside
(44.925 - 44.950 mm)
diameter
0.0020 - 0.0039 in.
Oil clearance
(0.050 - 0.100 mm)
Standard
1.8091 - 1.8100 in.
(45.950 - 45.975 mm)
1.8110 - 4.8120 in.
(46.000 - 46.025 mm)
0.0010 - 0.0030 in.
(0.025 - 0.075 mm)
Standard
0.0028 - 0.0059 in.
(0.07 - 0.15 mm)
Limit Reference page
0.0118 in. See Removal of camshaft
(0.030 mm) on page 6-36.
0.0020 in.
(0.05 mm)
See Inspection of camshaft
on page 6-45.
1.5098 in.
(38.350 mm)
1.7768 in.
(45.130 mm)
1.7673 in.
(44.890 mm)
0.0094 in.
(0.240 mm)
1.7756 in.
(45.100 mm)
See Inspection of camshaft
1.7667 in.
on page 6-45.
(44.875 mm)
0.0089 in.
(0.225 mm)
1.7756 in.
(45.100 mm)
1.7673 in.
(44.890 mm)
0.0083 in.
(0.210 mm)
Limit Reference page
1.8071 in.
(45.900 mm)
1.8140 in. See Inspection of idler gear
(46.075 mm) and shaft on page 6-46.
0.0069 in.
(0.175 mm)
Limit Reference page
0.0067 in. See Checking timing gear
(0.17 mm) backlash on page 6-34.
3TNV88F Service Manual