Section 05: COOLING SYSTEM
PA1562
18
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 13.1.2.
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.
4. Turn the fan blades in order to position the
locking plate bores over the rotor’s threaded
sockets.
5. Screw in and tighten the spare bolts
(Fig. 24).
6. Using the automatic belt tensioner, release
tension on the drive belt in order to be able to
rotate the fan clutch drive mechanism by
hand.
7. Rotate the shaft to get access to the second
locking plate and rotor threaded sockets.
8. Screw in and tighten the spare bolts.
FIGURE 24: MECHANICAL LOCKING
05124
13.2 MAINTENANCE
1. Clean the fan and related parts with clean
fuel oil and dry them with compressed air. Do
not clean with steam or high-pressure jet.
2. Check the fan blades for cracks or other
damage. Replace the fan if the blades are
cracked or deformed.
Summary of Contents for X3-45 Multiplex
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL X3 COACHES PA1562 4th edition...
Page 13: ...Section 00 GENERAL INFORMATION 11 PA1562 FIGURE 16 METRIC US STANDARD CONVERSION TABLE 00005...
Page 14: ...Section 00 General Information PA1562 12 FIGURE 17 CONVERSION CHART 00006...
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Page 253: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12...
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Page 439: ...Forward and Rear Axle Carrier Diagnostic Flowcharts TP 99125 Issued 12 99 TECHNICAL BULLETIN...
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Page 500: ...Notes Copyright 2002 Maintenance Manual MM 0204 Page 4 ArvinMeritor Inc Issued 08 02...
Page 504: ...Notes Copyright 2002 Maintenance Manual MM 0204 Page 8 ArvinMeritor Inc Issued 08 02...
Page 526: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA...
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Page 941: ...Initial Installation Section 2 Initial Installation Installation 14 Maintenance Tips 15...
Page 965: ...Glossary Section 5 Glossary Glossary 39...
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Page 1197: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R...
Page 1198: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
Page 1221: ...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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Page 1265: ...Section 23 ACCESSORIES PA1562 5 FIGURE 2 AUDIO VIDEO CONNECTIONS...
Page 1278: ...Section 23 ACCESSORIES PA1562 18 FIGURE 26 FUNCTIONING OF LAVATORY 23051...
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Page 1379: ...LPCM OUTPUT...
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