Section 05: COOLING SYSTEM
PA1564
15
comparing data from engine coolant
temperature, charge air temperature, Allison
transmission oil temperature and small A/C High
side pressure to a set of calibration data. The
fan drive clutch is electromagnetic; the MCM
sends an electric current to regulate speed by
activating one magnetic coil for the first speed
and two magnetic coils for the second speed.
The settings are:
Engine
coolant
temp.
Air intake
temp.
Allison
trans. oil
temp.
208°F: fan
engages in
HIGH
SPEED
194°F: fan
engages in
HIGH
SPEED
230°F: fan
engages in
HIGH
SPEED
temperature
rising
203°F: fan
engages in
LOW
SPEED
176°F: fan
engages in
LOW
SPEED
216°F: fan
engages in
LOW
SPEED
203°F: fan
HIGH
SPEED
disengages
189°F: fan
HIGH
SPEED
disengages
225°F: fan
HIGH
SPEED
disengages
temperature
dropping
198°F: fan
LOW
SPEED
disengages
170°F: fan
LOW
SPEED
disengages
210°F: fan
LOW
SPEED
disengages
Small A/C high side pressure
170 psi: fan engages in HIGH
SPEED
pressure rising
120 psi: fan engages in LOW
SPEED
130 psi: fan HIGH SPEED
disengages
pressure dropping
90 psi: fan LOW SPEED
disengages
WARNING
DO NOT work near the fan with the engine
running or the ignition in the ON position. The
engine fan can engage at any time without
warning. Anyone near the fan when it turns on
could be seriously injured.
13.1 LOCKING RADIATOR FAN FOR
EMERGENCY OPERATION
13.1.1 Electrical Locking
If the cooling fan clutch does not function due to
an electrical control system malfunction and the
engine is overheating, execute the following
procedure:
1. Set the ignition key to the ON position.
2. Activate the dashboard Telltale Light Test
switch 3 times within 4 seconds.
3. In the engine compartment, set the starter
selector switch to REAR START and then
start the engine from the rear.
WARNING
Potential Accident Risk. Always use extreme
caution when working in the vicinity of hot,
rotating or moving parts.
While in this mode, the rear start push-button
can be used to manually engage the fan clutch.
The multiplex system knows when the engine is
already running, and it will not activate the
starter.
4. Press the push-button one time to engage
the clutch to 1
st
speed, press a second time
to engage to 2
nd
speed, press a third time to
stop the fan, press once again to return to 1
st
speed.
NOTE
If the fan clutch does not engage using this
procedure then the clutch is faulty or the
wiring between the multiplex module and the
clutch is faulty. Mechanically lock the fan as
described in section 14.1.2.
13.1.2 Mechanical Locking
Once mechanically locked, the fan is rigidly
connected to the drive mechanism and will
rotate continuously, with no considerations for
the cooling needs. This is an emergency
situation and the vehicle shall not be operated in
that situation for an extended period.
In case of a magnetic clutch malfunction:
1. Set the ignition to the OFF position and
remove the key from the contact switch to
prevent accidental starting of the engine.
2.
Disconnect the fan clutch electrical
connector.
3. Unscrew and remove the 4 spare bolts
screwed to the angle on the fan gearbox
mounting support.
Содержание LE MIRAGE XLII BUS SHELLS
Страница 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1564 1ST EDITION...
Страница 12: ...Section 00 GENERAL INFORMATION 10 PA1564 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005...
Страница 13: ...Section 00 GENERAL INFORMATION PA1564 11 FIGURE 14 CONVERSION CHART 00006...
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Страница 63: ...SECTION 01 ENGINE PA1564 33 FIGURE 13 POWER PLANT CRADLE INSTALLATION 01140...
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Страница 303: ...SPICER SPECIALITY AXLE DIVISION place product photo here SERVICE MANUAL GENERAL INFORMATION NDS Axle range BACK RETOUR...
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Страница 348: ...Page No 18 Manual No NDS8 Spicer Speciality Axle Division Technical Publications Spicer Speciality Axle Division TP1193...
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Страница 380: ...Section 12 BRAKE AND AIR SYSTEM PA1564 22 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5...
Страница 387: ...Section 12 BRAKE AND AIR SYSTEM PA1564 29 FIGURE 46 ABS 6S 5M CONFIGURATION...
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Страница 782: ...Section 16 SUSPENSION PA1564 22 FIGURE 26 SWAY BAR FRONT SUSPENSION 16138D FIGURE 27 SWAY BAR REAR SUSPENSION 16014...
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Страница 1083: ...Section 22 HEATING AND AIR CONDITIONING PA1564 15 FIGURE 16 REFRIGERANT CIRCUIT CENTRAL SYSTEM 22247...
Страница 1086: ...Section 22 HEATING AND AIR CONDITIONING PA1564 18 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP...
Страница 1106: ...Section 22 HEATING AND AIR CONDITIONING PA1564 38 FIGURE 39 REFRIGERANT CIRCUIT SMALL SYSTEM 22350...
Страница 1108: ...Section 22 HEATING AND AIR CONDITIONING PA1564 40 FIGURE 42 CENTRAL HEATING SYSTEM COMPONENTS 22338...
Страница 1118: ...Section 22 HEATING AND AIR CONDITIONING PA1564 50 FIGURE 54 HEATER LINE SHUTOFF VALVES WE...
Страница 1119: ...Section 22 HEATING AND AIR CONDITIONING PA1564 51 FIGURE 55 SMALL HEATING SYSTEM COMPONENTS 22337...
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Страница 1125: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R...
Страница 1126: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
Страница 1149: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R...
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Страница 1205: ...Section 24 LUBRICATION PA1564 5 FIGURE 1 LUBRICATION AND SERVICING POINTS ON INDEPENDENT FRONT SUSPENSION VEHICLES 24036_1...
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Страница 1223: ...Section 26 XLII SLIDE OUT PA1564 11...
Страница 1224: ...Section 26 XLII SLIDE OUT PA1564 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION...