
Section 000-0000
General Information - 3360 Off HighwayTruck
SM 1168 2-98
2
DRIVE AXLE
Heavy duty axle with single reduction spiral bevel gear
differential,fullfloatingaxleshafts,andplanetaryreductionat
eachwheel.
Ratios:
Differential ....................................................................3.73:1
Planetary ......................................................................5.80:1
TotalReduction...........................................................21.63:1
SUSPENSION
Front:King pin strut typeindependentfrontwheelsuspension
byself-contained,variablerate,nitrogen/oilcylinders.
Rear:Variableratenitrogen/oilcylinderswithA-framelinkage
andlateralstabilizerbar.
MaximumStrutStroke
Front........................................................... 251mm (9.9in)
Rear ........................................................... 182 mm(7.2 in)
MaximumRear AxleOscillation .......................± 6.5 Degrees
WHEELS AND TYRES
WheelRimWidth ............................................................ 17in
Standard Tyres (Front & Rear) ................24.00 R 35**Radial
InflationPressures (Front&Rear) .............. 6.5bar(94lbf/in²)
Note: Tyre pressures should be regarded as nominal only. It
isrecommendedthatfor tyres bothlistedandunlisted,the
usershouldconsultthetyre manufacturer and evaluatealljob
conditionsinordertomaketheproperselection.
BRAKES
Service
Allhydraulic brake system.Transmission mountedpressure
compensatingpumpprovideshydraulic pressure forbrakes
andsteering.Independentcircuitsfrontandrear. Each circuit
incorporatesanitrogen accumulator whichstoresenergyto
provideconsistentbrakingresponse.
Front Brake Circuit Pressure ................ 159bar (2300lbf/in²)
Rear Brake Circuit Pressure......................52bar(750lbf/in²)
Accumulators:
NitrogenPrechargePressure ................. 55 bar(800lbf/in²)
Front:
Type............................... Dry Disc with 1 calliper per wheel
Disc Diameter ............................................. 710mm (28 in)
PadArea,Total ..................................... 1 395 cm²(216 in²)
Rear:
Type................................ Oilcooled,multiplefrictiondiscs,
completelysealedfromdirtandwater.
BrakingSurface,Total ...................... 47 151 cm² (7 308 in²)
Parking
Application of rear brakes by springs in brake disc pack.
Hydraulicallyreleased.
Hold-offPressure ................................... 83bar(1 200lbf/in²)
Retardation
Modulated lever control of rear disc pack. 510 kW (685 hp)
continuous.
RetarderActuationPressure ............ upto 33bar(480lbf/in²)
Emergency
Pushbuttonsolenoidcontrolappliesserviceandparking
brakes.Automaticallyapplieswhenengineisswitched off.
Parking brake applies should system pressure fall below a
predeterminedlevel.
Brakes conform to ISO 3450, SAE J1473 OCT 90.
STEERING SYSTEM
Independenthydrostaticsteeringwithclosed-centresteering
valve,accumulatorandpressurecompensatingpistonpump.
Accumulatorprovidesuniformsteeringregardlessofengine
speed. In the event of loss of engine power it provides
steeringof approximately twolock-to-lock turns.
A low pressure indicator light warns of system pressure
below83 bar (1200 lbf/in²). Steeringmeets SAE J53.
System Pressure.................................. 159bar(2300lbf/in²)
ReliefPressure ..................................... 207 bar (3 000lbf/in²)
SteeringCylinders ......................DoubleActing,SingleStage
Accumulator:
Oil Capacity .................................. 14.0litres (3.70US gal)
NitrogenPrechargePressure ................. 55 bar(800lbf/in²)
SteeringAngle(LeftandRight) ......................................... 39°
Pump:
Type......................................................................... Piston
Capacity at2 100 rev/min.......... 1.4 litres/s(22 USgal/min)
BODY HYDRAULICS
Twobodyhoistcylinders are mountedbetweentheframe
rails. Cylinders are two-stage with power down in the second
stage.The bodyhydraulic system is independent ofthe
steeringhydraulicsystem.
System Relief Pressure ........................ 190bar(2750lbf/in²)
Pump:
Type........................................................................... Gear
Capacityat 2100rev/min ....... 3.5litres/s (55.5 USgal/min)
ControlValve ............... MechanicallyControlledOpenCentre
BodyRaise Time ................................................ 13Seconds
BodyLowerTime .................................................. 9 Seconds
ELECTRICAL
Type ...............................................24Volt,NegativeGround
Battery............ Two,12Volt,165Aheach,MaintenanceFree
Accessories ............................................................... 24Volt
Alternator ................................................................... 70Amp
Starter......................................................................... 8.9 kW
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