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TM 9-2330-385-14
3-6. SERVICE TIRES (CONT).
While changing tires or while performing tire maintenance, stay out of the trajectory as
shown by the area indicated. Failure to follow proper procedures may result in injury or
death to personnel.
Under some circumstances, the trajectory may deviate from its expected path. Failure to
follow proper procedures may result in injury or death to personnel.
Never inflate a tire without checking to ensure that the side ring is still properly seated and
the lock ring is properly seated in the lock ring groove. Ensure that the side ring, lock ring
and lock ring groove are not damaged. The side ring and lock ring may blow off during
inflation/deflation resulting in injury or death to personnel.
When inflating tires mounted on the trailer, all personnel must remain out of the trajectory
of the side ring and lock ring as shown by the areas indicated. Failure to follow proper
procedures may result in serious injury or death to personnel.
If the tire is underinflated or overinflated, or there is obvious or suspected damage on the
tire or wheel components, the tire must be completely deflated by removing the inflator
gage from the air hose and pressing down the handle until all air pressure has been
exhausted from tire. Stand out of the trajectory area or personal injury may result.
If tire has been run flat, or is overinflated or underinflated when tire pressure is measured
and operating terrain is compared to Table 3-6, or wheel/tire assembly has obvious or
suspected damage, it is not safe to adjust tire pressure. Completely deflate tire according to
Para 3-6 and remove the tire from the axle. Failure to follow these procedures may result in
serious personal injury or death.
Table 3-6. Unsafe Inflation Pressures
SPARE
SPARE
FRONT
REAR
FRONT
REAR
TIRE
TIRE
TIRES
TIRES
TIRES
TIRES
IS:
IS:
ARE:
ARE:
ARE:
ARE:
Overinflated.
Underinflated.
Overinflated.
Overinflated.
Underinflated.
Underinflated.
Tire pressure
Tire pressure
Tire pressure
Tire pressure
Tire pressure
Tire pressure
measured is
measured is
measured is
measured is
measured is
measured is
25% or more
80% or less
25% or more
25% or more
80% or less
80% or less
above standard
than the
above standard
above standard
than the
than the
pressure.
standard tire
pressure.
pressure.
standard tire
standard tire
pressure.
pressure.
pressure.
Do not adjust
Do not adjust
Do not adjust
Do not adjust
Do not adjust
Do not adjust
pressure if
pressure if
pressure if
pressure if
pressure if
pressure if
above pres-
below pres-
above pres-
above pres-
below pres-
below pres-
sure shown
sure shown
sure shown
sure shown
sure shown
sure shown
below.
below.
below.
below.
below.
below.
Highway
109 psi
70 psi
109 psi
100 psi
70 psi
64 psi
(752 kPa)
(483 kPa)
(752 kPa)
(690 kPa)
(483 kPa)
(441 kPa)
Cross-
109 psi
70 psi
64 psi
58 psi
41 psi
37 psi
Country
(752 kPa)
(483 kPa)
(441 kPa)
(400 kPa)
(283 kPa)
(255 kPa)
Mud, Sand,
109 psi
70 psi
40 psi
36 psi
26 psi
23 psi
and Snow
(752 kPa)
(483 kPa)
(276 kPa)
(248 kPa)
(179 kPa)
(159 kPa)
3-18

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