Pierce Driving and Controls Contin. Flashcards
All engine manufacturers warn against excessive engine operating time_____ at low
idle speed, particularly during cold weather.
(greater than 5 minutes)
Excessive idling can have the following detrimental effects
on the engine:
Fuel dilution of the lubricating oil / Unburned fuel passing through to the exhaust system / Carbon build-up in the cylinder / Cylinder head valve sticking / Smoking / Reduced performance
Additionally, torsional vibration levels for some engines may be higher at low idle speeds, leading to
_____.
premature wear of PTO splined shafts or other engine driven components.
If it is necessary to idle the engine for more than 5 minutes, the ____ should be activated to
increase the engine speed to at least 1000 rpm.
fast idle switch
Never stop the engine by turning off _____, or alternator damage may result.
the battery switch
The turbocharger contains bearings and seals that are subject to the high heat of combustion exhaust
gases. While the engine is running, this heat is carried away by normal oil circulation. If the engine is
stopped suddenly, the turbocharger temperature may rise as much as _____. This may result in
_____.
100°F (56°C) / seized bearings or loose oil seals
Stopping the Engine:
Idle engine for _____.
3 to 5 minutes
Brake fade occurs when the _____ and the stroke of the slack adjusters become less effective.
brake drums become hot and expand away
from the brake shoes
Downhill Operation or Heavy Braking:
If service brakes are required to
supplement retardation, apply the brakes in _____.
This will minimize heat buildup and reduce the possibility of brake fade.
short durations of 5 to 10 seconds rather than a continuous application
Air Pressure Gauge, Indicator Light, and Audible Alarm:
The indicator
light will light and the alarm will sound any time the ignition switch is set to the run position and the pressure in either
section is less than approximately ____.
60 psi
ABS cannot _____. Reduce speed
during slippery conditions, or serious injury or death may result.
provide more braking performance than the road conditions will permit
ABS will prevent wheel lock-up at all
times. _____ until the vehicle speed has been reduced to the desired level.
Push the pedal steadily (do not pump brakes)
Parking Brakes:
If air pressure is
reduced to approximately ___, the spring brake valve will automatically apply.
40 psi in both systems
Batteries give off ____ that is highly explosive
hydrogen gas
Whenever disconnecting battery terminals, always _____ . When
reconnecting, always connect the ground terminal last.
disconnect the ground terminal first
Do not attempt to jump-start a vehicle having a frozen battery, because the battery may _____. If a frozen battery is suspected, examine all fill vents on the battery. If ice can be seen, do not
attempt to start with jumper cables as long as the battery remains frozen. Thaw out battery and
recharge.
rupture or
explode
A typical automotive battery contains ____
lead and sulfuric acid.
Sulfuric acid and lead
react and release ___.
lead oxide and hydrogen gas.
Battery Charger:
At full charge, all five bars illuminate green to indicate battery voltage of ____
13 volts +
Battery Charger:
As the battery discharges, green bars extinguish ____ remain lit to indicate a battery voltage of
_____.
one at a time until three / 12.4 volts.
Battery Charger:
If the state of charge drops further, green bars _____ and continue to extinguish until one red
bar remains.
If the state of charge drops further still, the red bar will flash to indicate charge has dropped to 11.2 volts or below
turn orange / yellow in color /11.2 volts or below
Battery Over Charge:
If battery voltage gets too high _______ to indicate the over voltage condition.
If this occurs while the vehicle engine is running, there could be a fault with the alternator or charging system.
(15 volts or above), all five bars will flash red
Sleep Mode:
The charger will enter sleep mode after ____. The meter automatically comes out of sleep mode if either battery voltage is above 13 volts.
48 hours if the charger and/or the vehicle is off and either battery voltage is
below 13 volts
When in sleep mode, the LED lights will blink every____. The LED which blinks also indicates that battery’s
state of charge.
2-3 seconds
Start up sequence:
When power is applied, the battery charger monitor will cycle through a test mode. The blue “Charger On” LED will
flash, and both bar graphs will light up sequentially while changing colors, _____ , and then normal operation
begins.
flash red
Low Fuel Warning Light:
When the level in the fuel tank has dropped to the 1/8th tank mark:
• Light in fuel gauge comes on _____,
• Amber caution light in indicator bank comes on steady,
• LCD display ______ message.
steady / CAUTION text will flash with LOW FUEL LEVEL
Low Fuel Warning Light:
When the level in the fuel tank has dropped to the 1/32th tank mark:
• _____ in indicator bank comes on steady,
• LCD display _____ message,
• Caution alarm will chime.
Red warning light / WARNING text will flash with VERY LOW FUEL LEVEL
Maximum sump operating temperature is
250º
If the engine does not start with ___ , release the starter button and allow the starter motor to cool for ___ before attempting to start engine again.
15 seconds / 60 seconds
The vehicle is equipped with a C.E. Niehoff Model C531, ____ alternator with a remote regulator/rectifier.
360 amp
When the level in the fuel tank has dropped to the _____ tank mark:
Light in fuel gauge comes on steady.
___ caution light in indicator bank comes on steady.
LCD display CAUTION text will flash with ____ message.
1/8th / Amber / LOW FUEL LEVEL
When the level in the fuel tank has dropped to the ___ tank mark:
___ warning light in indicator bank comes on steady.
LCD display WARNING text will flash with _____ message.
____ will chime.
1/32th / Red / VERY LOW FUEL LEVEL / Caution alarm
