Section 12: BRAKE AND AIR SYSTEM
PA1564
28
29.2.3 Sensors
The sensors are mounted on the front and drive
axle wheel hubs (Fig. 44). The inductive sensors
consist essentially of a permanent magnet with a
round pole pin and a coil. The rotation of the
toothed wheel alters the magnetic flux picked up
by the coil, producing an alternating voltage, the
frequency of which is proportional to wheel
speed. When wheel speed decreases, magnetic
flux decreases proportionately. Consequently,
the electronic control unit will command the
solenoid control valve to decrease the pressure
at the corresponding brake chamber.
Maintenance
No specific maintenance is required for sensors,
except if the sensors have to be removed for
axle servicing. In such a case, sensors should
be lubricated with special grease (Prévost
#680460) before reinstallation. Refer to
paragraph
“Sensor Installation”
for details.
FIGURE 44: ABS SENSOR LOCATION
12153
NOTE
The resistance value, when sensors are
checked as a unit, must be equal to 1,75 k
ohms. To check the sensors for proper output
voltage after the sensors and toothed wheels
have been assembled to the axle, connect a
suitable AC voltmeter across the output
terminals. With the hubs rotating at 30 rpm,
the output voltages should read from 50 to
1999 mV to be acceptable.
29.2.4 Sensor Installation
The following procedure deals with sensor
installation on the axle wheel hubs. Read
procedure carefully before reinstalling a sensor,
as its installation must comply with operational
tolerances and specifications.
1. Apply recommended lubricant (Prévost
#680460) to spring clip and sensor.
CAUTION
Use only this type of grease on the sensors.
2. Insert spring clip in the holder on hub. Make
sure the spring clip tabs are on the inboard
side of the vehicle. Push in until the clip
stops.
3. Push the sensor completely inside the
spring clip until it is in contact with the tooth
wheel. Ensure mounting is rigid, as it is an
important criterion for adequate sensor
operation.
NOTE
This installation should be of the "press fit"
type.
29.2.5 Spring clip
The spring clip retains the sensor in its mounting
bracket close to the toothed pulse wheel. The
gap between the sensor end and teeth is set
automatically by pushing the sensor in the clip
hard up against the tooth wheel, and the latter
knocks back the sensor to its adjusted position
(Fig. 45).
FIGURE 45: SPRING CLIP
12161
Maintenance
The spring clip requires no specific
maintenance.
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 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...
Страница 379: ...Section 12 BRAKE AND AIR SYSTEM PA1564 21 FIGURE 38 AIR OPERATED BRAKING SYSTEM WE...
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 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...