Progressive Turf Equipment TDR-30 - Manual (Page 41)

40
FASTENERS INSTALLATION TORQUE
The chart lists the correct tightening torque for fasteners on Progressive Turf
Equipment mowers. When bolts are to be tightened or replaced, refer to this chart
to determine the proper torque except when specific torque values are assigned in
the manual. Only SAE grade 5 fasteners are to be used in the assembly of this
machine, or as otherwise specified in this manual.
Bolt Head Markings
SAE Grade 2 SAE Grade 5 SAE Grade 8
(No Dashes) (3 Dashes) (6 Dashes)
Bolt Diameter (in.)
(SAE Grade 5 Bolts)
Recommended Torque in
Foot Pounds (Newton-Meters)
5/16 21 (28)
3/8 38 (52)
7/16 55 (75)
½ 85 (115)
9/16 125 (170)
5/8 175 (240)
¾ 300 (410)
7/8 450 (610)
1 680 (925)
1” LH Spindle Nut
60 (82)