616-Z Tractor
Product Information
- Model #: 74021
- Serial #: 590001 - 599999
- Product Type: Riding Products
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Assembly Drawings
Search for a part within assembly drawings:
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Service Manual
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Operator's Manual
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Model #
74021 -
Serial #
590001 - 599999 -
Product Name
616-Z Tractor -
Product Brand
Toro -
Product Type
Riding Products -
Product Series
Zero Radius Turn, 600 Series -
Swath
Deck Optional -
Discharge
Deck Optional -
Engine/Motor Manufacturer
Toro Power Plus/Onan -
Engine/Motor Size
16 hp -
Engine/Motor Type
4 Cycle -
Engine Starter
Electric -
Transmission Type
Hydrostatic
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Engine: Bore
3.250" (82.55mm) -
Engine: Stroke
2.625" (66.68mm) -
Engine: Displacement
43.3 cu.in. (710cc) -
Engine: Compression Ratio
6.5:1 -
Engine: Horse Power at Rated Speed (3600 rpm)
16 hp. (11.9kW) -
Engine: Oil Capacity w/o Filter
1.7 Qts. (1.6 L) -
Engine: Oil Filter Capacity
0.3 Qts. (0.3L) -
Engine: Valve Clearance Intake (cold)
.005" (.13mm) -
Engine: Valve Clearance Exhaust (cold)
.013" (.33mm) -
Engine: Ignition Timing (BTC)
20 Degrees -
Engine: Cylinder Compression
75-115 psi. (517-793 kPa) -
Engine: Cylinder Bore Diameter "minimum"
3.2490" (82.52mm) -
Engine: Cylinder Bore Diameter "maximum"
3.2500" (82.55mm) -
Engine: Piston Clearance "minimum"
0.0033" (0.084mm) -
Engine: Piston Clearance "maximum"
0.0053" (0.135mm) -
Engine: Cylinder Block, Maximum Taper Allowable
0.005" (0.13mm) -
Engine: Cylinder Block, Maximum Allowable Out Of Round
0.003" (0.08mm) -
Engine: Top Main Bearing Bore "minimum"
2.1870" (55.55mm) -
Engine: Top Main Bearing Bore "maximum"
2.1880" (55.58mm) -
Engine: Top Main Bearing I.D. (bearing installed) " minimum"
2.0015" (50.84mm) -
Engine: Top Main Bearing I.D. (bearing installed) " maximum"
2.0040" (50.90mm) -
Engine: Bottom Main Bearing Bore "minimum"
2.1840" (55.47mm) -
Engine: Bottom Main Bearing I.D. (Bearing Installed) "minimum"
1.9990" (50.77mm) -
Engine: Bottom Main Bearing I.D. (Bearing Installed) "maximum"
2.0020" (50.85mm) -
Engine: Bottom Main Bearing Clearance "minimum"
0.0010" (0.025mm) -
Engine: Cam Bearing Bore "minimum"
1.4995" (38.08mm) -
Engine: Cam Bearing Bore "maximum"
1.5005" (38.11mm) -
Engine: Cam Bearing I.D. (bearing installed) "minimum"
1.3757" (34.94mm) -
Engine: Cam Bearing I.D. (bearing installed) "maximum"
1.3787" (35.02mm) -
Engine: Cam Bearing Clearance "minimum"
0.0015" (0.038mm) -
Engine: Cam Bearing Clearance "maximum"
0.0030" (0.076mm) -
Engine: Intake Valve Seat Bore "minimum"
1.4395" (36.56mm) -
Engine: Intake Valve Seat Bore "maximum"
1.4405" (36.59mm) -
Engine: Exhaust Valve Seat Bore "minimum"
1.1890" (30.20mm) -
Engine: Exhaust Valve Seat Bore "maximum"
1.1900" (30.23mm) -
Engine: Tappet Bore Diameter "minimum"
0.7500" (19.05mm) -
Engine: Tappet Bore Diameter "maximum"
0.7515" (19.09mm) -
Engine: Tappet Clearance "minimum"
0.0020" (0.051mm) -
Engine: Tappet Clearance "maximum"
0.0040" (0.102mm) -
Engine: Crankshaft, Top Main Bearing Journal Diameter "minimum"
1.9992" (50.78mm) -
Engine: Crankshaft, Top Main Bearing Journal Diameter "maximum"
2.0000" (50.80mm) -
Engine: Crankshaft, Bottom Main Bearing Journal Diameter "minimum"
1.9972" (50.73mm) -
Engine: Crankshaft, Bottom Main Bearing Journal Diameter "maximum"
1.9980" (50.75mm) -
Engine: Crankshaft, Connecting Rod Journal Diameter "minimum"
1.6252" (41.28mm) -
Engine: Crankshaft, Connecting Rod Journal Diameter "maximum"
1.6260" (41.30mm) -
Engine: Crankshaft End Play "minimum"
0.0060" (0.152mm) -
Engine: Crankshaft End Play "maximum"
0.0120" (0.305mm) -
Engine: Connecting Rod Large Bore I.D. (Bolts Torque)"minimum"
1.6280" (41.35mm) -
Engine: Connecting Rod Large Bore I.D. (Bolts Torque)"maximum"
1.6285" (41.36mm) -
Engine: Large Bore Clearance "minimum"
0.0020" (0.051mm) -
Engine: Large Bore Clearance "maximum"
0.0033" (0.084mm) -
Engine: Piston Pin Bore "minimum"
0.6879" (17.47mm) -
Engine: Piston Pin Bore "maximum"
0.6882" (17.48mm) -
Engine: Piston Pin Clearance "minimum"
0.0002" (0.005mm) -
Engine: Piston Pin Clearance "maximum"
0.0007" (0.018mm) -
Engine: Piston Pin End Play "minimum"
0.0020" (0.051mm) -
Engine: Piston Pin End Play "maximum"
0.0120" (0.813mm) -
Engine: Camshaft Journal Diameter "minimum"
1.3740" (34.90mm) -
Engine: Camshaft Journal Diameter "maximum"
1.3745" (34.91mm) -
Engine: Camshaft Lobe Height Intake "maximum"
1.1370" (28.88mm) -
Engine: Camshaft Lobe Height Exhaust "maximum"
1.1570" (29.39mm) -
Engine: Camshaft End Play "minimum"
0.0110" (0.279mm) -
Engine: Camshaft End Play "maximum"
0.0480" (1.219mm) -
Engine: Piston Diameter (90 degrees from pin 1.187 from top)"minimum
3.2445" (82.41mm) -
Engine: Piston Diameter (90 degrees from pin 1.187 from top)"maximum
3.2462" (82.45mm) -
Engine: Ring Groove Width Top Groove "minimum"
0.0800" (2.032mm) -
Engine: Ring Groove Width Top Groove "maximum"
0.0810" (2.057mm) -
Engine: Ring Groove Width Middle Groove"minimum"
0.0800" (2.032mm) -
Engine: Ring Groove Width Middle Groove"maximum"
0.0810" (2.057mm) -
Engine: Ring Groove Width Bottom Groove "minimum"
0.1880" (4.775mm) -
Engine: Ring Groove Width Bottom Groove "maximum"
0.1890" (4.800mm) -
Engine: Top Ring Groove Clearance "minimum"
0.0030" (0.076mm) -
Engine: Top Ring Groove Clearance "maximum"
0.0080" (0.203mm) -
Engine: Piston Pin Bore "minimum"
0.6877" (17.47mm) -
Engine: Piston Pin Clearance "minimum"
0.00004" (0.001mm) -
Engine: Piston Pin Diameter "minimum"
0.6875" (17.46mm) -
Engine: Ring End Gap "minimum"
0.0100" (0.254mm) -
Engine: Ring End Gap "maximum"
0.0200" (0.508mm) -
Engine: Intake Valve Stem Diameter "minimum"
1.4700" (37.34mm) -
Engine: Intake Valve Stem Diameter "maximum"
0.2800" (7.112mm) -
Engine: Intake Valve Face Angle
44 Degrees -
Engine: Exhaust Valve Stem Diameter "minimum"
0.2780" (7.061mm) -
Engine: Exhaust Valve Stem Diameter "maximum"
0.2785" (7.074mm) -
Engine: Exhaust Valve Face Angle
44 Degrees -
Engine: Intake Valve Seat O.D. "minimum"
1.4700" (37.34mm) -
Engine: Intake Valve Seat O.D. "maximum"
1.4710" (37.36mm) -
Engine: Intake Seat Width "minimum"
0.0310" (0.787mm) -
Engine: Intake Seat Width "maximum"
0.0470" (1.194mm) -
Engine: Intake Seat Angle
45 Degrees -
Engine: Exhaust Valve O.D. "minimum"
1.1920" (30.28mm) -
Engine: Exhaust Valve O.D. "maximum"
1.1930" (30.30mm) -
Engine: Exhaust Valve Seat Width "minimum"
0.0310" (0.787mm) -
Engine: Exhaust Valve Seat Width "maximum"
0.0470" (1.194mm) -
Engine: Exhaust Valve Seat Angle
45 Degrees -
Engine: Valve Guide Intake I.D. "minimum"
0.2810" (7.137mm) -
Engine: Valve Guide Intake I.D. "maximum"
0.2820" (7.163mm) -
Engine: Intake Stem To Guide Clearance "minimum"
0.0010" (0.025mm) -
Engine: Intake Stem To Guide Clearance "maximum"
0.0025" (0.064mm) -
Engine: Exhaust Valve Guide I.D."minimum"
0.2805" (7.125mm) -
Engine: Exhaust Valve Guide I.D."maximum"
0.2815" (7.150mm) -
Engine: Exhaust Stem To Guide Clearance "minimum"
0.0020" (0.051mm) -
Engine: Exhaust Stem To Guide Clearance "maximum"
0.0035" (0.089mm) -
Engine: Tappet Body Diameter "minimum"
0.7475" (18.99mm) -
Engine: Tappet Body Diameter "maximum"
0.7480" (19.00mm) -
Engine: Valve Open Length
1.055" (26.80mm) -
Engine: Valve Closed Length
1.346" (34.19mm) -
Engine: Spring Laod (valve open)
55 lbs. (25kg) -
Engine: Spring Laod (valve closed)
25 lbs. (11kg) -
Engine: Timing Gear Backlash "minimum"
0.0010" (0.025mm) -
Engine: Oil Pump Gear Backlash "minimum"
0.0010" (0.025mm) -
Engine: Timing Gear Backlash "maximum"
0.0050" (0.127mm) -
Engine: Oil Pump Gear Backlash "maximum"
0.0080" (0.203mm) -
Engine Torque: Gearcase Cover
10-12 ft.lbs. (14-16Nm) -
Engine Torque: Oil Base
27-29 ft.lbs. (36-39Nm) -
Engine Torque: Oil Base Cover Inner Bolts
19-21 ft.lbs. (25-28Nm) -
Engine Torque: Oil Base Cover Outer Bolts
9-11 ft.lbs. (12-15Nm) -
Engine Torque: Oil Cooler
20-24 ft.lbs. (27-33Nm) -
Engine Torque: Oil Pump
7-9 ft.lbs. (10-12Nm) -
Engine Torque: Hood Support Screws
7-9 ft.lbs. (10-12Nm) -
Engine Torque: Starter Mounting Bolts
19-21 ft.lbs. (25-28Nm) -
Engine Torque: Connecting Rod Bolts
12-14 ft.lbs. (16-19Nm) -
Engine Torque: Flywheel Capscrews
50-55 ft.lbs. (67-75Nm) -
Engine Torque: Valve Cover
3-4 ft.lbs. (4-5Nm) -
Engine Torque: Cylinder Head Bolts (Asbestos Gasket) "cold"
16-18 ft.lbs. (22-24Nm) -
Engine Torque: Cylinder Head Bolts (Graphoil Gasket) "cold"
14-16 ft.lbs. (19-22Nm) -
Engine Torque: Intake Manifold Mounting Screws
6-10 ft.lbs. (8-14Nm) -
Engine Torque: Exhaust Manifold Mounting Screws
9-11 ft.lbs. (12-15Nm) -
Engine Torque: 1/4" Cylinder Block Nuts & Bolts
7-9 ft.lbs. (10-12Nm) -
Engine Torque: 5/16" Clinder Block Nuts & Bolts
8-10 ft.lbs. (11-14Nm) -
Engine: Spark Plug Gap
.025"/ .64mm