Special Torques; Hex Head Cap Screw Torques; U.s. Standard - Husqvarna Z400 Series Service Manual

SPECIFICATIONS

Special Torques

Component
Engine Crankshaft
Deck Pulley
Spark Plug
Blade Bolt
Standard 1/4 in Fastener
Standard 5/16 in Fastener
Standard 3/8 in Fastener
Standard 7/16 in Fastener
Standard 1/2 in Fastener

Hex Head Cap Screw Torques

U.S. Standard

The table below lists general torque specifications for a
metric fastener. Unless otherwise specified, tighten
metric fasteners to torque values listed below.
Grade SAE Grade 5
Size (in) lb-ft
1/4
5/16
3/8
7/16
1/2
9/16 110
5/8 150
3/4 250
7/8 378
1-1/8 782
Lug Nut
N•m
9 12
18 24
31 42
50 68
75 102
149
203
339
512
1060
90–100 lb-ft (122–135 N•m)
Proper torque values are only achieved when
using a torque wrench with properly maintained
calibrations. Refer to your torque wrench
operator manual for specifications before use.
SAE Grade 8
lb-ft N•m
13 18
28 38
46 62
75 102
115 156
165 224
225 305
370 502
591 801
1410 1912
Figure 2-6
2-6
Specification
50 lb-ft (68 N•m)
150 lb-ft (203 N•m)
75 lb-ft (102 N•m)
192 lb-in (22 N•m)
12 lb-in (12 N•m)
25 lb-in (24 N•m)
33 lb-ft (45 N•m)
52 lb-ft (70 N•m)
80 lb-ft (108 N•m)
NOTICE
Flangelock Screw with
Flangelock Nut
lb-ft
–
24
40
–
–
–
–
–
–
–
N•m
–
33
54
–
–
–
–
–
–
–
HUS1008
Z400 Series