Cooling Assembly; Maintenance - PREVOST H3-41 Maintenance Manual

SECTION 05B: X3 SERIES COOLING SYSTEM
To replace a filter:
1. Close the filter shutoff cock on the filter
mounting head and unscrew the old filter
from mounting.
WARNING
Failure to relieve cooling system pressure
may result in personal injury.
2. Remove and discard the filter. Recover the
coolant remaining in the filter with a suitable
container.
3. Clean the filter adapter with a clean, lint-free
cloth.
4. Coat surface of gasket with clean antifreeze,
tighten 2/3 to 1 turn after gasket makes
contact with head.
5. Open the filter shutoff cock.
6. Start engine and check for leaks.
CAUTION
Do not exceed recommended service intervals.
FIGURE 10: COOLANT FILTER (VOLVO D13)

MAINTENANCE

Coolant filter
Replace the coolant filter cartridge at the
intervals specified by the Lubrication And
Servicing Schedule
LUBRICATION & SERVICING.
11.

COOLING ASSEMBLY

The cooling assembly uses a total of 8 identical
12 inches (305mm) brushless (24V) electric
cooling fans to dissipate the heat generated by
18
PA1621 Maintenance Manual All Series
in Section 24:
|
January 2017
the engine. The two first fans are used by the
charge air cooler (CAC) to cool the hot
compressed air coming from the turbocharger;
the remaining 6 fans are used by the radiator.
Each fan is fixed to a shroud by 4 hex screws
and is individually connected to the circuit
breaker box through a main wiring harness
(refer to section 06 ELECTRICAL for more
information regarding breaker box components
and harness).
The shroud assists in directing the air flow
generated by the fans through the radiator/CAC
assembly with maximum efficiency and is sealed
to the radiator/CAC assembly (cooling pack)
with rubber seals. The shroud is hinged and can
be "pivoted" out of the way to inspect or clean
the radiator/CAC fins and tanks.
A cover is installed over the shroud to protect
the fan harness and connectors from the
elements.
CAUTION
The fan shroud is an essential component
used to achieve maximum air flow capacity
through the cooling assembly. To prevent
overheating, inspect rubber seal regularly to
ensure proper sealing.
FIGURE 11: FAN ORDER AND CONNECTOR NUMBER AT
CIRCUIT BREAKER BOX