SECTION 05: COOLING SYSTEM
20
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
FIGURE 36: DISMOUNT THIS BRACKET
6. Loosen the gearbox support bracket top bolts
(Figure 37).
7. Unscrew and remove 4 gearbox mounting
bolts.
8. Slide the gearbox out of the support
assembly.
FIGURE 37: RIGHT ANGLE GEARBOX
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FIGURE 38: RIGHT ANGLE GEARBOX
15. FAN REMOVAL AND INSTALLATION
The fan is bolted to the right angle gearbox shaft
flange. To remove the fan:
Unscrew and remove the mounting bolts
and washers.
To reinstall the fan:
If the fan is still in the radiator fan shroud,
place 2 of the mounting bolts on the
opposite side of the flange, in reverse
direction, in order to use them as guide pins
to position the fan.
Once properly positioned, screw the 4
remaining bolts back in (finger tight).
Finally, take the 2 bolts that were used as
guide pins and screw them back in on the
proper side of the fan. Tighten in a star
pattern to 32 lbf-ft.
FIGURE 39: RADIATOR FAN MOUNTING BOLTS
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15.1 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.
3. Remove any rust or rough spots in the
grooves of the fan pulley. If the grooves are
damaged or severely worn, replace the
pulley.
4. Do not restrict fan rotation during engine
operation for any reason.
5. Do not operate fan-driving mechanism with a
damaged fan assembly. Replace a damaged
fan as soon as the fault is noted.
6. Immediately investigate and correct any
operator complaint involving driving
mechanism or cooling system performance.
7. When questions arise, obtain answers before
proceeding. Assistance is available through
the Prevost After-Sales Service Support
serving your area.
15.2 INSPECTION
DANGER
Set the starter selector switch in engine
compartment to the "Off" position to prevent
accidental starting of the engine.
