TM-9-2320-279-10-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
OPERATOR’S MANUAL VOLUME 1 OF 2
DECEMBER 1998
CHANGE 5
TM-9-2320-279-10-1 - Page 665 of 773
TM 9-2320-279-10-1
Operators Maintenance (Cont)
Table 3-4.
Unsafe Inflation Pressures (Cont)
WARNING
If tire has been run flat, or is over- or underinflated
when tire pressure is measured and operating terrain is
compared to Table 3-4, or if wheel/tire assembly has
obvious or suspected damage, it is not safe to adjust tire
pressure. Completely deflate tire according to para 3-9,
and remove the tire from the axle. Failure to follow
these procedures may result in serious personal injury
or death.
Highway
Standard Tire
Sand Tire
Cross
Country-Dry
Standard Tire
Sand Tire
Cross
Country-Wet
Standard Tire
Sand Tire
Sand
Standard Tire
Sand Tire
Rear
Tires
are:
(M977, M978,
M983)
Overinflated.
Tire pressure
measured is
25% or more
above the stan-
dard tire pres-
sure.
Do not adjust
pressure if
above pressure
shown below.
88 psi (607 kPa)
88 psi (607 kPa)
50 psi (345 kPa)
32 psi (221 kPa)
63 psi (434 kPa)
NA
NA
NA
38 psi (262 kPa)
NA
44 psi (303 kPa)
38 psi (262 kPa)
* Absolute minimum pressure.
Rear
Tires
are:
(M977,M978,
M983)
Rear
Tires
are:
(M985)
Underinflated.
Tire pressure
measured is
80% or less
than the stan-
dard tire pres-
sure.
Overinflated.
Tire pressure
measured is
25% or more
above the stan-
dard tire pres-
sure.
Do not adjust
pressure if
below pressure
shown below.
Do not adjust
pressure if
above pressure
shown below.
56 psi (386 kpa)
113 psi (779 kPa)
56psi(386kPa) 125 psi (862 (862kPa
24 psi (166 kPa)
50 psi (345 kPa)
NA
NA
28 psi (193 kPa)
50 psi (345 kPd)
*25 psi (172 kPa)
50 psi (345 kPa)
Rear
Tires
are:
(M985)
Under-inflated.
Tire pressure
measured is
80% or leas
than the stan-
dard tire pres-
sure.
Do not adjust
pressure if
below pressure
shown below.
72 psi (496 kPa)
80 psi (552 kPa)
40 psi (276 kPa)
NA
32 psi (221 kPa)
NA
32 psi (221 kPa)
32 psi (221 kpa)
Change 5 3-62.5
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