PREVOST X3-45 COMMUTER User Manual

SECTION 05: COOLING SYSTEM
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
9
3. MAINTENANCE
3.1 GENERAL RECOMMANDATIONS
A systematic routine inspection of cooling
system components is essential to ensure
maximum engine and heating system efficiency.
• Check coolant level in the surge/recovery
tank daily, and correct if required. Test
antifreeze strength.
• Check water pump belt and replace if frayed
or badly worn.
• Check radiator cores for leaks and make
sure the cores are not clogged with dirt or
insects. To avoid damaging the fins, clean
cores with a low-pressure air hose. Steam
clean if required.
• Inspect the water pump operation. A leaky
pump sucks in air, increasing corrosion.
• Repair all leaks promptly. Unrepaired leaks
can lead to trouble. Inspect and tighten
radiator mounts periodically. Test and
replace thermostat regularly.
• Pressurize system periodically using Hansen
Quick Coupling (Figure 3).
FIGURE 3: HANSEN QUICK COUPLING
NOTE
In order to ensure the integrity of the system, it
is recommended that a periodic cooling system
pressure check be made. Pressurize the
cooling system to 10-
15 psi using Hansen
Quick Coupling. Do not exceed 15 psi.
Any measurable drop in pressure may indicate
a leak. Whenever the oil pan is removed, the
cooling system should be pressure checked as
a means of identifying any incipient coolant
leaks. Make sure the cause of the internal leak
has been corrected before
flushing the
contaminated system.
CAUTION
Hoses and hose connections should be clean
and free of oil and grease before hose clamp
installation. Do not use
soap, lubricant or
sealing compound on hose connections.
NOTE
For additional information conc
erning Volvo
D13 engine components or engine-related
components, consult Volvo Trucks North
America Web site under: Parts & Service. On
Volvo web site, you will find detailed service
procedures for parts replacement, repair and
maintenance.
3.2 COOLANT FILTER HOUSING SHUT-
OFF VALVE – SPINDLE SERVICING
Seizing of the spindle in the coolant filter housing
(Figure 4) could prevent proper operation of the
valve. With proper cleaning, the application of a
silicone-based lubricant to the groove in the
spindle, and cycling the valve at regular intervals
will prevent the buildup of corrosion in the
coolant filter housing. Follow this spindle
servicing and repair procedure.
FIGURE 4: COOLANT FILTER HOUSING
1. Park the vehicle on a level surface. Apply the
parking brake and place the transmission in
neutral.
2. Turn the ignition switch to the OFF position.
3. On the engine compartment rear start panel
(Figure 5), push the engine stop/ignition
interlock button to prevent the engine from
being started.

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