PREVOST X3-45 COMMUTER User Manual

SECTION 05: COOLING SYSTEM
14
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
Surge tank sensor, make sure that:
• Arrow on the sensor body is pointing up.
• PTFE sealant (Teflon) is applied to the
threads
• A maximum of two threads are visible
once tightened.
FIGURE 17: RECOVERY TANK SENSOR & LEVEL
MARKS
FIGURE 18: COOLANT SURGE TANK SENSOR
6.3 THAWING COOLING SYSTEM
If the cooling system becomes frozen solid,
place the coach in a warm area until the ice is
completely thawed.
CAUTION
Under no circumstances should the engine be
operated when the cooling system is frozen,
as it will result in engine overheating due to
insufficient coolant.
Once it is thawed, check engine, radiator and
related components for damage caused by
expansion of frozen coolant fluid.
6.4 COOLANT RECOMMENDATIONS FOR
VOLVO D13 ENGINE
The coolant provides a medium for heat transfer
and controls the internal temperature of the
engine during operation. In an engine having
proper coolant flow, some of the combustion
heat is conveyed through the cylinder walls and
the cylinder head into the coolant. Without
adequate coolant, normal heat transfer cannot
take place within the engine, and engine
temperature rapidly rises.
To function properly, the cooling system must be
pressurized to prevent localized boiling of
coolant. The system must be kept clean and
leak-free. The pressure cap must be checked
periodically for proper operation.
Always maintain cooling system at the proper
coolant level. Check daily, use recommended
Final Charge Global Extended Life Coolant
premix (50/50 antifreeze and water mixture
ratio). This ratio should be used year-round to
provide freeze and boil-over protection as well as
providing a stable environment for seals and
hoses.
Freeze
protection
Boiling
protection
antifreeze
in mixture
-34°F (-38°C) 265°F (129°C) 50%
Do not mix two different types of coolant.
Do not use antifreeze formulated for automobile
gasoline engines, these have a very high silicate
content that will clog the radiator and leave
unwanted deposits in the engine.
A decal located on the surge tank provides
information on recommended coolants.
CAUTION
Use only Final Charge Global Extended Life
Coolant (pre-diluted 50/50 mixture).
Use a Long-Life filter without supplemental
additives (SCA).
MAINTENANCE
Coolant & filter
Replace the coolant & the filter cartridge at the
intervals specified by the Lubrication And
Servicing Schedule in Section 24:
LUBRICATION & SERVICING.
Do not exceed recommended service intervals.

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