Grasshopper 721DT User Manual

13
Bolt Head Markings
SAE Grade 2
(no dashes)
SAE Grade 5
(3 radial dashes)
SAE Grade 8
(6 radial dashes)
MEASUREMENT CONVERSION
Measurements expressed in this manual are
decimal values. Use the chart below if you
are unsure of a measurement to obtain the
fractional equivalent.
BOLT SIZE AND TIGHTENING
RECOMMENDATIONS
The chart below lists the correct tighten-
ing torque for bolts used on Grasshopper
equipment. When bolts are to be tightened
or replaced refer to this chart to determine
the grade of bolt and proper torque (except
when specifi c torque values are assigned in
the manual text).
Decimal
Conversion Table - Inches
Decimal Fraction
0.062
0.125
0.187
0.250
0.312
0.375
0.437
0.500
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
0.562
0.625
0.687
0.750
0.812
0.875
0.937
1.000
9/16
5/8
11/16
3/4
13/16
7/8
15/16
1
Fraction
Recommended Torque in Foot Pounds
FractionDecimal SAE Grade 2 SAE Grade 5 SAE Grade 8
Bolt Diameter in Inches
0.250
0.312
0.375
0.437
0.500
0.562
0.625
0.750
0.875
1.000
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
6
13
23
37
57
82
111
200
280
350
11
21
38
55
85
125
175
300
450
680
14
25
55
80
120
180
230
440
720
1035

Grasshopper 721DT Specifications

General

Brand	Grasshopper
Model	721DT
Category	Lawn Mower
Language	English