Cooling Pack (Radiator & Cac) Removal & Installation - PREVOST H3-41 Maintenance Manual

SECTION 05B: X3 SERIES COOLING SYSTEM
5. Unfasten the limiter strap at the bottom of
the shroud assembly.
6. Support the bottom of the shroud assembly
with a lift table or other suitable equipment.
7. Unscrew the shroud upper hinge at the
vehicle structure and remove the hinge.
NOTE
It is good practice to scribe the hinge position
on the vehicle structure to use as a reference
point upon reinstallation. This will minimize
the need for hinge adjustment.
8. Slightly lift the door with the lift table to
disengage the lower hinge pin and allow
shroud removal from the vehicle.
NOTE
Do not lose the plastic bushings installed at
the pivot point of both lower and upper
hinges.
9. Reverse removal procedure to reinstall the
fan shroud assembly making sure that;

The bushings are installed at the hinges
pivot point.

There is no gap at both hinges between
the bushing and the hinge pivot.

Main connectors are fully engaged
(paint mark are aligned).
FIGURE 17: INSTALLED HINGE & MAIN CONNECTOR
22
PA1621 Maintenance Manual All Series
11.4 COOLING PACK (RADIATOR & CAC)
REMOVAL & INSTALLATION
NOTE
For CAC only replacement, removal of the
entire cooling pack is not necessary. Refer to
paragraph 11.5 in this section for "in vehicle"
CAC replacement instructions.
WARNING
GALVANIC CORROSION PREVENTION
Galvanic corrosion (also called bimetallic
an electrochemical process in which
one metal corrodes preferentially to another when
both metals are in electrical contact.
To avoid galvanic corrosion problems, the
aluminum CAC and radiator have been
electrically isolated from the cooling pack
When replacing the entire cooling pack with a
new unit, make sure before installation that :
-
There is no conductivity between the
frame and both CAC and radiator core
using a suitable ohmmeter or continuity
(buzzer) tester.
Note: If using ohmmeter, a minimum of
100 000 (100K) ohms must be observed to be
considered acceptable for installation.
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January 2017
corrosion or contact corrosion) is
stainless frame.