Section 000-0000
General Information -TR40 Off-Highway Truck
SM 1665 1-992
DRIVE AXLE
Heavy duty axle with single reduction spiral bevel gear
differential, full floating axle shafts, and planetary reduction
at each wheel.
Ratios: Standard Optional
Differential.............................................. 3.15:1 3.73:1
Planetary ............................................... 5.66:1 5.66:1
TotalReduction.................................... 17.83:1 21.11:1
SUSPENSION
Front: King pin strut type independent front wheel
suspension by self-contained, variable rate, nitrogen/oil
cylinders.
Rear: Variable rate nitrogen/oil cylinders with A-frame
linkage and lateral stabilizer bar.
Maximum Strut Stroke
Front ......................................................... 251 mm (9.9 in)
Rear .......................................................... 182 mm (7.2 in)
Maximum Rear Axle Oscillation..................... ± 6.5 Degrees
WHEELS AND TYRES
Wheel Rim Width .......................................................... 13 in
Standard Tyres (Front & Rear) ..............18.00 R 33** Radial
Note: Consult tyre manufacturers for optimum tyre selection
and correct t-km/h (ton-mile/h capacity for application.
BRAKES
Service
All hydraulic brake system. Transmission mounted pressure
compensatingpumpprovideshydraulicpressureforbrakes
and steering. Independent circuits front and rear. Each
circuit incorporates a nitrogen accumulator which stores
energy to provide consistent braking response.
Front Brake Circuit Pressure ................ 159 bar(2 300lbf/in²)
Rear Brake Circuit Pressure...................... 52bar(750lbf/in²)
Accumulators:
Nitrogen Precharge Pressure...............55 bar (800 lbf/in²)
Front:
Type............................... Dry Disc with 1 calliper per wheel
DiscDiameter .......................................... 660mm(25.5in)
PadArea,Total ..................................... 1 395 cm²(216 in²)
Rear:
Type..................Oilcooled,multiple friction discs(14total),
completelysealedfromdirtandwater.
Braking Surface, Total ....................38 310 cm² (5 938 in²)
Cooling Flow, Max. .......... 553 litres/min (146 US gal/min)
Parking
Application of rear brakes by springs in brake disc pack.
Hydraulically released.
Hold-off Pressure ..................................83 bar (1 200 lbf/in²)
Retardation
Modulated lever control of rear disc pack.
Retarder Actuation Pressure ......... up to 33 bar (480 lbf/in²)
Emergency
Push button solenoid control applies service and parking
brakes. Automatically applies when engine is switched off.
Parking brake applies should system pressure fall below a
predetermined level.
Brakes conform to ISO 3450, SAE J1473 OCT 90.
STEERING SYSTEM
Independent hydrostatic steering with closed-centre
steering valve, accumulator and pressure compensating
piston pump.
Accumulator provides uniform steering regardless of engine
speed. In the event of loss of engine power it provides
steering of approximately two lock-to-lock turns. A low
pressure indicator light warns of system pressure below
83 bar (1 200 lbf/in²). Steering conforms to ISO 5010,
SAE J53.
System Pressure................................ 159 bar (2 300 lbf/in²)
Relief Pressure ...................................207 bar (3 000 lbf/in²)
Steering Cylinders ................... Double Acting, Single Stage
Accumulator:
Oil Capacity ................................. 14.0 litres (3.70 US gal)
Nitrogen Precharge Pressure...............55 bar (800 lbf/in²)
Steering Angle (Left and Right) .......................................39°
Pump:
Type......................................................................... Piston
Capacity at 2 100 rev/min ..........1.4 litres/s (22US gal/min)
BODY HYDRAULICS
Two body hoist cylinders are mounted between the frame
rails. Cylinders are two-stage with power down in the second
stage.
System Relief Pressure ........................ 190bar(2 750lbf/in²)
Pump:
Type........................................................................... Gear
Capacity at 2 100 rev/min.. 210 litres/min (56 US gal/min)
Control Valve ............ Mechanically Controlled Open Centre
Body Raise Time................................................ 13 Seconds
Body Lower Time ................................................. 9 Seconds
ELECTRICAL
Type ............................................. 24 Volt, Negative Ground
Battery.........................................Two, 12 Volt, 165 Ah each
Accessories................................................................24 Volt
Alternator ..................................................................70 Amp
Starter ........................................................................ 8.9 kW
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