11.4 Hydraulic Fitting Torque
Tighten flare-type tube fittings:
1.
Check the flare and flare seat for defects that might
cause leaks.
2.
Align the tube with the fitting before tightening.
3.
Hand-tighten the swivel nut until it is snug.
4.
To prevent the tube from twisting, use two
wrenches. Place one wrench on the connector body
and tighten the swivel nut with the second wrench.
Torque the fitting to the correct specification.
If a torque wrench is not available, use the flats from
finger tight (FFFT) method.
Hydraulic Fitting Torque Specifications
Tube size
OD
Hex size
across
flats
Torque
Flats from finger
tight
Inches
Inches
lbf•ft
N•m
Flats
Turns
3/16
7/16
6
8
2
1/6
1/4
9/16
11–12
15–17
2
1/6
5/16
5/8
14–16
19–22
2
1/6
3/8
11/16
20–22
27–30
1-1/4
1/6
1/2
7/8
44–48
59–65
1
1/6
5/8
1
50–58
68–79
1
1/6
3/4
1-1/4
79–88
107–119
1
1/8
1
1-5/8
117–125 158–170
1
1/8
Specifications are for non-lubricated connections.
11.5 Lug Nut Torque
WARNING!
Wheel lug nuts must be installed and kept at
the correct torque to prevent loose wheels,
broken studs, or possible separation of a
wheel from the axle.
It is an extremely important safety procedure to apply
and maintain the correct torque on lug nuts that secure
the wheel to the trailer axle. A calibrated torque wrench
is the best tool to make sure that the correct amount of
torque is applied to a fastener.
Tighten wheel lug nuts to the correct torque before
the first use and after each wheel removal. After a
wheel is installed, check and torque the lug nuts after
the first 10 miles (16 km), 25 miles (40 km), and
50 miles (80 km). Check the lug nut torque periodically
thereafter.
•
Start all lug nuts onto the threads by hand.
•
Tighten lug nuts in stages, following the pattern
shown below the Lug Nut Torque Specifications
table.
Lug Nut Torque Specifications
Wheel
size
Units
First stage
Second stage
Third stage
8 inch
lbf•ft
N•m
12–20
16–26
30–35
39–45.5
45–55
58.5–71.5
12 inch
lbf•ft
N•m
20–25
26–32.5
35–40
45.5–52
50–60
65–78
13 inch
lbf•ft
N•m
20–25
26–32.5
35–40
45.5–52
50–60
65–78
14 inch
lbf•ft
N•m
20–25
26–32.5
50–60
65–78
90–120
117–156
15 inch
lbf•ft
N•m
20–25
26–32.5
50–60
65–78
90–120
117–156
16 inch
lbf•ft
N•m
20–25
26–32.5
50–60
65–78
90–120
117–156
Lug nut torque pattern:
4
bolts
5
bolts
6
bolts
8
bolts
Specifications
WP525
Firewood Processor
66
