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TM 9-2320-364-10
2-211
(2)
The CTIS has four possible settings, HIGHWAY, CROSS COUNTRY,
MUD, SAND AND SNOW and EMERGENCY. Each has a maximum
allowable speed. MUD, SAND AND SNOW setting and EMERGENCY
setting have axle lockup modes.
(3)
The CTIS increases tire inflation pressure when truck speed exceeds the
allowable speed for each setting. When an increase in speed is required,
maintain the lower speed until the tires are re-inflated to the correct
pressure.
Table 2-6. CTIS Maximum Allowable Speeds and Lockup Modes
SETTING
SPEED LIMIT
LOCKUP MODE
1. HIGHWAY
55 mph (88 km/h)
No lockup.
2. CROSS COUNTRY
3. MUD, SAND AND
SNOW
40 mph (64 km/h)
12 mph (19 km/h)
No lockup.
Interaxle differentials lockup.
(Axles one and two rotate at
the same rate.) (Axles three,
four and five rotate at the same
rate.) (Tires on each axle may
rotate independently.)
4. EMERGENCY
5 mph (8 km/h)
Interaxle differentials lockup.
(Axles one and two rotate at
the same rate.) (Axles, three,
four and five rotate at the same
rate.) Side-to-side axle
differentials lockup only when
transfer case is shifted to low
range. (Causes the tire on each
axle to rotate at the same rate.)
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