PREVOST H3-41 - Steering; Electrical System; Suspension; Alignment Specifications

TECHNICAL INFORMATION
1
Right front steer axle (curb side)
2
Left front steer axle (driver’s side)
3
Right rear drive axle (curb side)
4
Left rear drive axle (driver’s side)
5
Not used
6
Not used
STEERING
• Tilt steering wheel and telescopic steering
column;
• Integral hydraulic assisted steering gear;
• System pressure: 2175 psi (15 000 kPa);
ELECTRICAL SYSTEM
• 24 volt, negative ground;
• 12 volt exterior lighting;
• Twin 28 volt, 140 amp, self-regulated, belt-
driven, air-cooled Bosch alternators;
• Four 12 volt, group 31 format maintenance-
free batteries connected in series/parallel.
Cold cranking capacity is 1900 amps with a
reserve capacity of 195 minutes;
• 100 amp battery equalizer;
SUSPENSION
Goodyear rolling lobe type air springs (bellows)
are used throughout.
FRONT AXLE
2 Bellows (12”);
2 Shock absorbers;
4 Radius rods;
1 Transverse radius rod;
1 Height control valve;
1 Anti-roll bar, 2“ diameter.
DRIVE AXLE
4 Bellows (11”);
4 Shock absorbers;
3 Radius rods;
2 Height control valves;
1 Panhard rod
1 Anti-roll bar, 1½” diameter
TAG AXLE
2 Bellows (11”);
2 Shock absorbers;
3 Radius rods;
1 Panhard rod.
ALIGNMENT SPECIFICATIONS
Use wheel alignment systems which work with
angle measurements only, such as Josam or
Hunter systems. Alignment specifications are
listed in the following tables:
FRONT AXLE
Minimum
value
Nominal
value
Maximum
value
Right camber
(degrees)
-0.5 0.0 0.5
Left camber
(degrees)
-0.5 0.0 0.5
Right caster
(degrees)
2.0 2.75 3.5
Left caster
(degrees)
2.0 2.75 3.5
Total toe-in
(inches)
1/16 3/32 1/8
DRIVE AXLE
Minimum
value
Nominal
value
Maximum
value
Thrust angle
(degrees)
-0.11 0 0.11
TAG AXLE
Minimum
value
Nominal
value
Maximum
value
Thrust angle
(degrees)*
-0.02 0 0.02
(*) Use the drive axle as reference
HEATING AND AIR CONDITIONING
A large capacity, central A/C provides enough
conditioned and filtered air for all climatic
conditions. Fresh air is drawn into the system
from the evaporator compartment on driver’s
side of the vehicle. Return air is taken from the
middle of the vehicle. The driver’s heater and
defogger are controlled separately from the
central unit. An air mixture selector enables air
to be drawn into the system from outside the
vehicle or recirculated. Optionally, condensers
installed in the overhead storage compartments
provide cool air to the seated passengers from
the overhead registers.
A/C SYSTEM
Cooling capacity
9 tons
Refrigerant type
134a
Heating capacity
152 000 Btu/h
Airflow
2 600 cfm (73.6 m
3
/min)
COMPRESSOR
Number of cylinders
6
Operating speed
400 to 2 200 rpm
(2,600 rpm,
119