Toro Groundsmaster 328-D, Service Manual

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Engine
Item Standard Specification Repair Limit Service Limit
Governor Mechanical/Centrifugal
Operating Speed (no load) 3200 rpm
±
50 rpm
Idle Speed (no load) 1500 rpm
±
50 rpm
Compression 32 kg/cm
2
(455 psi) at 280 rpm 26 kg/cm
2
(370 psi) 22 kg/cm
2
(313 psi)
Pressure Difference Between Cylinders 2.5 kg/cm
2
(36 psi) max.
Cylinder Injection Order 1 - 3 - 2
Injection Timing 23
o
B.T.D.C. (at smoke set position
±
2
o
Cylinder Head
Bottom Surface Flatness (distortion) 0.05 mm (0.002 in.) max. 0.1 mm (0.004 in.)
Valve Guide I.D. 6.6 mm (0.26 in.)
Valve Seat Angle 45
o
Valve Seat Width 1.3 - 1.8 mm (0.051 - 0.071 in.) 2.5 mm (0.1 .in.)
Valve Seat Sinkage –1 mm (– 0.039 in.)
Valve Clearance (cold) 0.25 mm (0.01 in.)
(both intake and exhaust)
Valves
Valve Head Dia. (IN) 27.2 mm (1.079 in.)
Valve Head Dia. (EX) 25.2 mm (0.992 in.)
Overall Length 114.5 (4.508 in.)
Valve Stem O.D. 6.6 mm (0.260 in.)
Stem to Guide Clearance (IN) 0.10 mm (0.004 in.)
Stem to Guide Clearance (EX) 0.15 mm (0.006 in.)
Valve Seat Face Angle 45
o
Valve Head Thickness (margin width) 1 mm (0.039 in.) 0.5 mm (0.020 in.)
Valve Head Sinkage
(from cyl. head bottom face)
0.5 mm (0.020 in.) 1.5 mm (0.06 in.)
Valve Spring
Free Length 43 mm (1.693 in.) – 1 mm (– 0.039 in.)
Installed Load/Height 14
±
0.7kg/36 mm –15%
(30.9
±
1.5 lb./1.417 in.)
29.75
±
1.5 kg/28 mm –10%
(65.6
±
3.3 lb./1.102 in.)
Squareness 2
o
3
o
Rocker Arm I.D. 18.9 mm (0.744 in.)
Rocker Arm to Shaft Clearance –0.2 mm (0.008 in.)
Cylinder Block
Camshoft hole I.D.
Front (Bush) 45 mm (1.772 in.)
Oil Clearance 0.15 mm (0.006 in.)
Center 44 mm (1.732 in.)
Rear 34 mm (1.339 in.)
Cylinder Bore 73 mm (2.874 in.) +0.2 mm (0.008 in.) + 0.95 mm (0.037 in.)
Oversize finish tolerance 0 to 0.03 mm (0 to 0.001 in.)
Cylindricity of cylinder bore 0.01 mm (0.0004 in.) max.
Warpage of head gasket mating surface 0.05 mm (0.0020 in.) max. 0.1 mm (0.004 in.)
Groundsmaster
®
300 Series Page 4 - 5 Specifications