SPECIFICATION FOR SLEW CRANES RT 40 & 30

  CHASSIS
  • Torsion resistant with rigid steel structure.
  ENGINE
  • Suitable water cooled diesel engine of adequate HP.
  • Fuel Tank capacity 300 liters.
  TRANSMISSION
  • Hydraulic torque converter coupled to the engine, oil cooler started
  • Power shift gear box with adequate speeds. transfer box coupled to the gear box connected to the torque converter by hydraulic pipes and propeller shaft individual gear step are controlled by solenoid switch from the crane cab instrument panel.
 BRAKES
  • Service: Foot operated compressed air over hydraulic brake acting on all wheels
  • Parking: Hand oerated spring loaded fail safe air brake.
  STEERING
  • Fully hydraulic, controlled from the crane cab via hydraulic rotary joint to the chassis.
  • Four steering modes-2 wheel (front). 2 wheel (rear) 4 wheel and crab.
  • Auto reversal mechanism to ensure correct steering wheel control irrespective of the position of the superstructure in relation to the chassis
  ELECTRICAL
  • 24 volts system.
  • 2 main head lamps, 2 brakes and flashing trafficator lamps at rear 2 flashing trafficator lamps at front, 1 work lamp.
  OUTRIGGERS
  • Four nos. out & down type hydraulically operated with fail safe dual lock valves.
  • Control is effected via electro hydraulic valves individually or simultaneously. 
  HYDRAULIC SYSTEM
  • Main hydraulic pump / double pump connected to the torque converter.
  • Four nos. 3 way proportional control valves, operated hydraulic joystick enabling simultaneous independent crane operation and progressive speed control.
  • Hydraulic cylinder specially designed for sustaining all operating and shock loads.
  • Safety valves in all hydraulic cylinder for protection against pipe and hose ruptures.
  • Pistons rods hard chromed and protected from dirt by scraper rings 
  • Counter balance valves (in derricking and hoist circuit ) to provide controlled derricking and hoisting operation under load
  AXLE
  • Front : Drive & steer, rigid frame mounted.
  • Rear :  Drive & steer centrally pivoted, lateral oscillating with hydraulic locking device
  DRIVE
  • 4 x4 for off the road movement, all wheel drive.
  • 4 x 2 for road travel, front axle drive. 
  WHEELS
  • Wheel rim 13.00 x 25.00 offset disc.
  • Tyre inflator ( standard ).
  CRANE CAB ALL WEATHER COMFORT
  • Sheet metal structure sliding door, large sized safety glass windows adjustable driver's seat hinged windscreen pane interior lights indicator for torque converter and gear box oil temperature compressed air pressure gauge for hydraulic system 
    of superstructure, rpm meter hour meter and pilot lamps for engine monitoring self centering type control levers. All controls for crane traveling operations within easy reach.
  SUPERSTRUCTURE
  • All welded rigid construction Counterweight : removeable , bolted to the superstructure 
  RING GEAR ASSEMBLY
  • Single ball bearing slewing ring fitted between carrier and superstructure.
  SLEWING GEAR
  • Fixed displacement hydraulic motor, planetary gear drive including spring loaded multiple disc brakes released hydraulically. 
  • Free wheeling safety device for automatic alignment of boom over the load 360 degree continuous slew.
  BOOM
  • Derricking through single cylinder with integral safety brake valve for controlled lowering 
  HOIST WINCH
  • Drive: Axial piston, fixed displacement hydraulic motor through planetary gear box.
  • Brakes: An automatic fall safe spring applied hydraulic released multiple disc brake, together with counter balance valve to control lowering speed.
  • Over hoist / over lowering limit switch to cut off hydraulic system in case of over hoisting / over lowering
  HOOK BLOCK
  • 4 sheaves reeved for 8 part line.
  ELECTRONIC SAFE LOAD INDICATOR
  • Indicates actual load rated load, load radius and boom elevation angle at any particular instant. At overoad condition there is audio visual warning and all such hydraulic operation that tend to increase the load moments (unsafe operation) are automatically cut off while operations like derricking in and hoisting downstill being possible
  OPTIONAL - EXTRA
  • Lattice boom extension 8.5 m
  • Auxiliary hoisting gear with rope length 110m (approx) and rope dia 14 mm (RT 30) 
    / 16 mm (RT 40).
  • High tension warning device.
  • 6 tonnes hook block.
  • Cab heater & demister
  • Fire extinguishers.
  • Spark arrestor
  • Marker lights
  • Fog lightsCold climate kit
  • Spare wheel & tyre
  • Air conditioner.
  OTHER SPECIFICATIONS
RT - 30

RT - 40

 Max. lift Capacity  32 T  40 T
 Main hydraulic pump  Fixed Displacement Gear Type  Fixed Displacement Gear Type
 Max. Flow  220 l/min  220 l/min
 Circuit Pressure  260 kg / sq.cm.  260 kg / sq.cm.
 Hoist winch Rope
                Dia  16 mm  18 mm
                Length  160 m  175 m
 Boom  3 section hydraulic 
 telescopic rectangular box 
 type boom made of 4 high 
 tensile steel sections welded 
 together
 4 Section boom (3 section 
 hydraulically telescopic +1 
 power assist ) rectangular box 
 type boom made of 4 plates 
 high tensile steel welded 
 together
 Gross vehicle weight  28,300 kg  36,000 kg
 Counter weight  6.1 T  6.3 T
 Tyres  18.00 x 25-28 PR 4 Nos. 
 earthmover type
 18.00 x 25-32 PR 4 nos. 
 earthmover type
 PERFORMANCE PARAMETER
 Boom Derricking 
 (unladen)
 -1 deg to +83 deg in 45 sec 
 (approx.)
 - 2 deg to + 80 deg in 40 sec 
 (approx.)
 Boom telescoping 
 (unladen)
 10 m to 25 m in 75 sec 
 (approx.)
9.75 m to 24.75 m in 75 sec. (approx )
 Grade ability  50% unladen 45% unladen
 Max. Travel Speed  30 kmph  30 kmph
 Slew Speed  0-3 rpm (unladen)  0-2 rpm (unladen)
 Turning Circle Dia
 (kerb)
 14 m  15.5 m
 Max. Rope Speed  60 m / min  60 m / min