PREVOST X3-45 COMMUTER User Manual

SECTION 05: COOLING SYSTEM
22
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
WARNING
Cooling fans may start when the engine is
shut down in the following conditions:
• If a High Exhaust Temperature condition
exists (e.g. following regeneration).
• During “Motor Test” sequence.
MAINTENANCE
Inspect fan blades regularly, check for dirt or
grime accumulations on the blade that could
cause vibrations, clean as necessary using water
and regular strength degreaser.
Check for cracks and signs of abrasion on the
blades that could indicate contact with debris or
obstruction during operation.
Check the bottom of the shroud cover and
remove debris that could have accumulated. In
sub-zero winter area, also check for snow and
ice accumulation that could block the fan blades
rotation.
Unlatch (two latches, upper shown) and open the
fan shroud as necessary to facilitate cleaning
and debris removal.
NOTE
Electric cooling fan motors are sealed and
certified IP6K9K and IP68.They can therefore be
safely power/pressure washed.
NOTE
To prevent a situation where debris would
stick to the radiator door (due to fans suction
force) and prevent full cooling performance,
all fans are forced to stop for a period of 25
sec. every 30 minutes.
NOTE
To keep area between fans and shroud cover
clean and, in winter, prevent snow and ice
accumulation, a cleaning sequence, where
the fans will run at full reverse speed for 30
sec. will take place the first time the vehicle
reaches 19 mph (30 km/h) after start-up.
A winter cleaning mode will also take place if
exterior temperature drops below 32°F (0°C)
and will activate the fans at full reverse speed
for 30 sec every 30 min.
CAUTION
Fans are factory balanced by the use of small
metal weight clipped to the fan blades, to
avoid damaging vibrations
during fan
operation, do not remove, shift or interchange
balancing weights.
11.2 COOLING FAN REPLACEMENT
Proceed as follow to remove one (or more)
individual fan from the shroud (Figure 24).
1. Unplug the fan from the main fan harness
(blue connector).
2. Remove the 4 hex screws holding the fan
body to the shroud.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in