PREVOST X3-45 COMMUTER User Manual

SECTION 05: COOLING SYSTEM
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
17
DANGER
Coolant is toxic; risk of poisoning. Do not drink
coolant. Use proper hand protection when
handling. Keep coolant out of reach of children
and animals. Failure to follow these
precautions can cause serious illness or
death.
FIGURE 20: EXTRACTING COOLANT
6. Open the radiator drain cock.
7. Remove the transmission oil cooler. Drain,
flush and inspect. Refer to Section 7,
“TRANSMISSION” for oil cooler
maintenance or preventive replacement.
CAUTION
If freezing weather is anticipated and the
engine is not protected with antifreeze, drain
the cooling system completely when the
vehicle is not in use. Trapped water in the
cylinder block, radiator or other components
may freeze and expand resulting in damages.
Leave the drain plugs open until the cooling
system can be filled with coolant fluid. Do not
run engine with cooling system empty.
To drain the entire system, do the previous steps
while maintaining the shutoff valves in the open
position; follow procedure under “Draining
Heating System” in Section 22.
8. FILLING COOLING SYSTEM
If only the engine and related components were
drained, maintain the two heater line shutoff
valves in their closed position, then proceed as
follows:
1. Close radiator drain cock.
2. Open the shut-off valve on the coolant filter
mounting head.
3. Refill cooling system from the surge tank
filler cap inlet with the recommended
ethylene glycol-based antifreeze and water
solution of the required concentration using
the coolant extractor.
NOTE
Make sure the purge lines are properly
connected and not obstructed. The purge lines
(thermostat housing dome, radiator top tank,
transmission oil cooler or delivery line) are
required to ensure complete engine fill and
proper purging of air in the system.
NOTE
The coolant level should remain
within two
inches of the tank filler neck.
4. Install the pressure cap, then start the engine
and run it at fast idle until reaching normal
operating temperature. Check for leaks.
NOTE
If for any reason, the coolant level drops below
the surge tank critically low
level probe, the
Check Engine warning light will illuminate.
5. Stop engine and allow cooling.
6. Open the two heater line shutoff valves,
check the coolant level and add as required.
CAUTION
Never pour cold coolant into a hot engine.
The sudden change in temperature may crack
the cylinder head or block.

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