TM 9-2320-363-10
2-17. OPERATE CTIS (M917A1 AND M917A1 W/KS) (Con’t).
b. CTIS Operation.
NOTE
Before operating CTIS, become familiar with CTIS prin-
ciples of operation (Chapter 1, Section III) and CTIS con-
trols and indicators (Chapter 2, Section I).
(1)
When engine is started, tire pressures are pressures LAST
ACHIEVED when vehicle was operated (i.e., cross-country pressures achieved,
HWY selected and pressures not achieved, vehicle shut down). Upon restart, system
will default to cross-country.
(2)
Tire pressures may be checked at any time by pressing mode
key for selected mode. CTIS automatically performs inflation or deflation as required.
(3)
Press HWY (Highway) mode key to operate on improved
road surfaces. Do not exceed 60 mph (97 kph) or reduce MPH indicator light will
come on. Vehicle speed should be reduced at this time.
(4)
Press X-C (Cross-Country) mode key to operate on non-
paved secondary roads and unimproved surfaces. Do not exceed 40 mph (64 kph) or
reduce MPH indicator light will come on. Vehicle speed should be reduced at this
time. If overspeed is exceeded for more than one minute, CTIS will automatically
inflate to highway setting.
(5)
Press SAND mode key to operate in sand, snow, and mud.
Do not exceed 25 mph (40 kph) or reduce MPH indicator light will come on. Vehicle
speed should be reduced at this time. If overspeed is exceeded for more than one
minute, CTIS will automatically inflate to cross-country setting.
When resuming operation on highway surfaces, be sure
to reset CTIS selector panel to higher tire pressures.
Operating vehicle with underinflated tires will cause pre-
mature tire wear or damage to tires causing unsafe driv-
ing conditions. Failure to follow this warning may result
in death or injury to personnel.
(6)
Reset CTIS to higher tire pressures as required.
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