Toro Pro Force 44552, Service Manual

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Other Torque Specifications
SAE Grade 8 Steel Set Screws
Recommended Torque
Thread Size
Square Head Hex Socket
1/4 - 20 UNC 140 ± 20 in-lb 73 ± 12 in-lb
5/16 - 18 UNC 215 ± 35 in-lb 145 ± 20 in-lb
3/8 - 16 UNC 35 ± 10 ft-lb 18 ± 3 ft-lb
1/2 - 13 UNC 75 ± 15 ft-lb 50 ± 10 ft-lb
Thread Cutting Screws (Zinc Plated Steel)
Type 1, Type 23 or Type F
Thread Size Baseline Torque**
No. 6 - 32 UNC 20 ± 5 in-lb
No. 8 - 32 UNC 30 ± 5 in-lb
No. 10 - 24 UNC 38 ± 7 in-lb
1/4 - 20 UNC 85 ± 15 in-lb
5/16 - 18 UNC
110 ± 20 in-lb
3/8 - 16 UNC 200 ± 100 in-lb
Wheel Bolts and Lug Nuts
Thread Size Recommended Torque*
7/16 - 20 UNF Grade 5 65 ± 10 ft-lb 88 ± 14 N∙m
1/2 - 20 UNF Grade 5 80 ± 10 ft-lb 108 ± 14 N∙m
M12 X 1.25 Class 8.8 80 ± 10 ft-lb 108 ± 14 N∙m
M12 X 1.5 Class 8.8 80 ± 10 ft-lb 108 ± 14 N∙m
*For steel wheels and non-lubricated fasteners
Thread Cutting Screws (Zinc Plated Steel)
Threads per Inch
Thread Size
Type A Type B
Baseline Torque**
No. 6 18 20 20 ± 5 in-lb
No. 8 15 18 30 ± 5 in-lb
No. 10 12 16 38 ± 7 in-lb
No. 12 11 14 85 ± 15 in-lb
**The hole size, material strength, material thickness, and material finish must be
considered when determining the specified torque values. All the torque values
are based on the non-lubricated fasteners.
Conversion Factors
in-lb X 11.2985 = N∙cm N∙cm X 0.08851 = in-lb
ft-lb X 1.3558 = N∙m N∙m X 0.7376 = ft-lb
Pro Force® Debris Blower Page 2–9 Specifications and Maintenance: Torque Specifications
18237SL Rev A