Table 2-3.--Torque Ranges by Bolt Size
A damaged or deteriorated inner tube
FINE THREAD SERIES
After the cause of the leak is corrected, inflate the
tire.
Bolt Size
Torque (lbs in.)
I N S TA L L I N G T H E W H E E L O N T H E
5/16 - 24
100 - 140
VEHICLE.--When wheels are to be used on dual
3/8 - 24
160 - 190
installations, they should be matched in size and tread
7/16 - 20
450 - 500
wear. Improperly matched tires cause rapid, uneven
wear, and may also cause transfer case and differential
1/2 - 20
480 - 690
failures.
9/16 - 18
800 - 1000
If dual tires are used in a situation where
5/8 - 18
1100 -1300
permissible differences in measurement are allowed,
the larger tire should be mounted outboard. Table 2-2
5. Attach the gauge to the remote controller.
lists some instances where differences in measurement
are allowed.
Ensure that the relief pressure valve setting of
the remote controller is no higher than
Table 2-2.--Tolerances in Matching Dual Tires
necessary.
Outside Diameter
Permissible Difference
6. Connect the servicing hose and shop air to the
of Tire
remote controller.
Diameter
Circumference
7. Inflate the tire to the prescribed service pressure.
Under 30 inches
3/4 inch
1/4 inch
Use short bursts to allow frequent pressure
1-1/8 inch
3/8 inch
From 30 to 40 inches
checks.
1-1/2 inch
1/2 inch
From 40 to 50 inches
1-3/4 inch
3/4 inch
Over 50 inche
8. Remove the fitting and valve adapter, and install
the valve cap, finger tight.
Use the following steps for installing a wheel on a
9. Loosen the tie-downs, and jack the vehicle
vehicle:
enough to remove the jack stands. Lower the
1. Ensure that the vehicle is firmly supported on
vehicle, remove the jack, and retighten the
jack stands and chocked. (For our discussion,
tie-downs.
assume that you are aboard ship, and tie-down
chains are required.)
WARNING
2. Place the wheel on the vehicle.
When inflating a tire outside of a safety cage,
Install single wheels with the demountable
ensure that all personnel are clear of the rim/tire
flange outboard.
trajectory area.
For dual wheel assemblies, mount the inner
NOTE: We elected to base our discussion here on
wheel with the demountable flange facing
the demountable flange rim because it is potentially the
outboard. Install a spacer and then the outer
most dangerous to work with. However, the procedures
wheel. For the outer wheel, the demountable
for working with solid and split rims is very similar.
flange faces inboard.
Consult NAVAIR 17-1-129 and other applicable
technical manuals for procedures for working with
3. Install the wheel bolts/clips. Use a crisscross
these types of rims.
pattern, and apply the correct amount of torque.
When torque values are not listed in the
Repairing Wheels by Welding
technical manual or MRC, use the values listed
in table 2-3.
Wheels should be repaired by welding only when
NOTE: Threads should not be oiled, as the torque
new wheels are not available. Such repairs are limited
values listed are derived with oil-free threads.
to one weld of a crack that is no longer than 1 inch, or
4. Install the tire valve adapter to the valve stem,
two welds of cracks that are no longer than 1/2 inch.
and connect the fitting to the adapter.
Further, no weld can be within 1 inch of any bolt hole.
2-85
