Cooling Fan Replacement - PREVOST H3-41 Maintenance Manual

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Maintenance manual (1214 pages)

Operator's manual (151 pages)

Manual (146 pages)

Table of Contents

SECTION 05B: X3 SERIES COOLING SYSTEM

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.

Open the fan shroud as necessary (remove top

and bottom hex screws shown below) to

facilitate cleaning and debris removal.

Electric cooling fan motors are sealed and

certified IP6K9K and IP68.They can therefore

be safely power/pressure washed.

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.

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 30 km/h (19 mph) after start-up.

A winter cleaning mode will also take place if

exterior temperature drops below 0°C (32°F)

and will activate the fans at full reverse speed

for 30 sec every 30 min.

PA1621 Maintenance Manual All Series

Fans are factory balanced by the use of small

metal weight clipped to the fan blades, to

operation, do not remove, shift or interchange

balancing weights.