PREVOST X3-45 COMMUTER User Manual

SECTION 05: COOLING SYSTEM
12
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
FIGURE 13: COOLANT DOUBLE CLAMPS
CAUTION
The hose clamps will break if over-torqued.
Do not over-
tighten, especially during cold
weather when hose has contracted.
FIGURE 14: PROPER HOSE CLAMP INSTALLATION
4.2 CONSTANT-TORQUE HOSE CLAMPS
ON CHARGE AIR COOLER (CAC)
If for any reason hose clamps need to be
replaced; install and tighten hose clamps to
specified torque (dry) (Figure 15).
TORQUE: 4.5-5.5 lb-ft (6.1-7.46 Nm)
Elbow V-clamps must also be torqued to
specification.
TORQUE: 4.5-6 lb-ft (6.1-8.13 Nm)
CAUTION
The hose clamps will break if over-tighten. Do
not over-
tighten, especially during cold
weather when hose has contracted.
FIGURE 15: CHARGE AIR COOLER HOSE CLAMPS
4.2.1 Maintenance
Since the constant-torque clamp automatically
adjusts to keep a consistent sealing pressure,
there is no need to torque hose clamps on a
regular basis. During vehicle operation and
shutdown, the screw tip will adjust according to
the temperature and pressure changes.
Checking for proper torque should be done
at room temperature.
5. THERMOSTAT OPERATION
5.1 THERMOSTAT REPLACEMENT
1. Drain the cooling system.
2. Remove the bolts, the thermostat housing
and the thermostat. Carefully clean the
thermostat seat and all cylinder head-to-
thermostat housing mating surfaces (Figure
16).

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