Section 12: BRAKE AND AIR SYSTEM
PA1562
10
a cleaning solvent (Fig.
7). Examine the
diaphragm; if cracked, worn or damaged,
replace with a new one. If the valve is
excessively grooved or pitted, it should be
replaced. Replace any other part that appears
worn or damaged. After reassembly, adjust to
the specified pressure setting and check for air
leakage.
FIGURE 7: AIR PRESSURE REGULATING VALVE
12141B
9.2
PRESSURE SETTING PROCEDURE
Remove the dust cap from the pressure check
valve (Fig. 8). Attach a pressure gauge at this
port and check the pressure reading. If the
pressure reading is incorrect, adjust as follows:
FIGURE 8: AIR PRESSURE REGULATOR
12200
1. Loosen the locking nut, turn the adjustment
screw counterclockwise to decrease
pressure by approximately 10 psi (70 kPa)
below the required pressure.
2. Turn the adjustment screw clockwise to
increase the pressure slowly until the re-
quired pressure setting is reached. Tighten
the locking nut.
3. Remove pressure gauge and replace dust
cap on the air pressure check valve.
10. AIR COMPRESSOR
10.1 WITH DETROIT DIESEL SERIES 60
ENGINE
The BA-921 Bendix air compressor is located on
starter side of the engine, on the rear of the
engine gear case (Fig. 9). Its function is to
provide and maintain air under pressure to
operate devices in brake and air systems.
This air compressor also drives the engine fuel
pump which is bolted to the rear end of the
compressor. The compressor crankshaft is
designed to accept a drive coupling which is
placed between the compressor and fuel pump.
The compressor is driven by the bull gear, and
is water cooled. Engine coolant is fed to the
compressor through a flexible hose tapped into
the block water jacket and connected to the rear
of the compressor. Coolant returns from the top
of the compressor (governor side) through a
flexible hose to the engine pump.
The air is taken from the air intake manifold and
entered in the top of the compressor. The
compressed air is pushed into the discharge line
located on side of the compressor, which sends
air to the air dryer. Lubricating oil is supplied to
the compressor by a line from the cylinder block
oil gallery connected to the air compressor.
Lubricating oil returns to the engine crankcase
through the air compressor drive assembly.
FIGURE 9: AIR COMPRESSOR LOCATION
03061
Maintenance and repair information on the
Bendix BA-921 air compressor is supplied in the
applicable booklet annexed to this section under
reference number SD-01-676.
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Страница 13: ...Section 00 GENERAL INFORMATION 11 PA1562 FIGURE 16 METRIC US STANDARD CONVERSION TABLE 00005...
Страница 14: ...Section 00 General Information PA1562 12 FIGURE 17 CONVERSION CHART 00006...
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Страница 941: ...Initial Installation Section 2 Initial Installation Installation 14 Maintenance Tips 15...
Страница 961: ...Section 4 Reinstallation Reinstallation 34 Filling and Air Bleeding the System 35 Maintenance Tips 36 Reinstallation...
Страница 965: ...Glossary Section 5 Glossary Glossary 39...
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Страница 996: ...Section 16 SUSPENSION PA1562 28 FIGURE 34 SWAY BAR FRONT SUSPENSION 16138B FIGURE 35 SWAY BAR REAR SUSPENSION 16144...
Страница 1005: ...Section 16 SUSPENSION PA1562 37 FIGURE 49 IFS AIR TANKS LOCATION 24034 FIGURE 50 I BEAM FRONT SUSPENSION AIR TANKS LOCATION 24035...
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Страница 1075: ...Section 18 BODY PA1562 57 14 BODY PANEL AND WINDOW SPACING FIGURE 42 BODY PANEL AND WINDOW SPACING 18631...
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Страница 1111: ...19 Manual No 7018081 02 Rel Jun 1999 Copyright Isringhausen 1999 PARTS MODEL 6800 338 BUS MODEL 6800 338 PREMIUM LX...
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Страница 1156: ...Section 22 HEATING AND AIR CONDITIONING PA1562 14 FIGURE 16 REFRIGERANT CIRCUIT CENTRAL AND AUXILIARY SYSTEMS 22313_1...
Страница 1178: ...Section 22 HEATING AND AIR CONDITIONING PA1562 36 FIGURE 36 CENTRAL HEATING SYSTEM COMPONENTS 22325...
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Страница 1414: ...Section 24 LUBRICATION PA1562 4 FIGURE 1 LUBRICATION AND SERVICING POINTS ON INDEPENDENT FRONT SUSPENSION VEHICLES 24031_1...
Страница 1415: ...Section 24 LUBRICATION PA1562 5 FIGURE 2 LUBRICATION AND SERVICING POINTS ON I BEAM AXLE FRONT SUSPENSION VEHICLES 24030_1...
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