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The Pulcino DTV 310S is a tandem roller designed for compacting road surfaces and bituminous conglomerates. It aims to create a compact, stable, and smooth underlay suitable for road transport. This machine is the result of Bitelli's expert design, incorporating technical innovations for material processing and ease of use. It is a solid, reliable, and ergonomic tandem roller with high accessibility and simple operation.
The Pulcino DTV 310S has an operating weight (CECE regulation) of 950 kg and an unladen weight of 830 kg. The axle weight for both front and rear is 475 kg. The linear static load is 6.3 kg/cm for the front and 6.8 kg/cm for the rear. The rolled width is 750 mm for the front and 700 mm for the rear. The turning circle is 3006 mm (outside) and 2205 mm (inside). The steering angle is ± 0.41 rad (± 25°), and the joint oscillation is ± 0.18 rad (± 11°).
The machine is powered by a HATZ 1D80Z or HATZ 1D81Z diesel engine (from serial number 140.98.0305 onwards), with a power output of 10.5 kW (14.3 CV) at 3000 rpm. It features a hydrostatic transmission (H) and can achieve speeds of 0-6 km/h in both forward and reverse. The servo-steering system is Orbitrol type. The vibrator operates at a frequency of 50 Hz, with 3000 rpm, and a centrifugal force of 1000 kg (9.80 kN).
Tank capacities include 7 liters for diesel fuel, 25 liters for hydraulic oil, and 70 liters for water.
The chassis consists of two half-frames connected by a central steering joint. The front half-frame houses the oil tank, the engine, and two hydraulic pumps (one for transmission, one for steering and vibration). The rear half-frame contains the driving controls and the water tank. Both half-frames support a driven and vibrating drum.
The air-cooled diesel engine has an electric starter and directly drives the hydraulic pumps for steering, front vibrator, and front drum drive. The noise level at the driving position is 84 dB(A), measured with the machine stopped on asphalt, engine running at 3000 rpm. Vibration measurements (hands: 0.8-1<2.5 m/s², feet: 1.5-2 m/s², seated part: 0.2-0.3<0.5 m/s²) were taken with the engine running at 2650 rpm, vibrator operating, on a hard asphalt surface, using a three-axis accelerometer on the steering wheel, forward-reverse lever, and driver's seat.
The steering system uses a hydraulic gear pump to drive an ORBITROL steering servo, controlled by the steering wheel. This system feeds oil to double-acting steering cylinders. In case of pressure loss, the ORBITROL unit can still function as a pump.
The hydrostatic transmission drives both drums using a variable displacement pump that feeds hydraulic motors on each drum. Movement (forward/reverse) is controlled by a lever next to the seat. A safety device prevents the engine from starting if the transmission lever is not in neutral.
The electrically controlled vibrator operates on the rear drum, driven by a gear pump. The hydraulic motor, located on the side of the rear drum, is splined onto the eccentric weight shaft via an overload coupling. The vibrator is activated by a switch on the transmission control lever. Silent-blocks isolate the chassis from vibrations.
The hydrostatic transmissions for both drive and vibrator systems are protected by an oil cooler and filters on the drive pump. The transmission filter includes a "filter clogged" indicator (vacuum meter) on its inlet side.
The service brake is hydrostatic, activated when the forward-reverse lever is moved to the central "neutral" position. The safety and parking brake is a multi-disc mechanical brake on the rear drum. In case of hydraulic pressure failure, the brakes automatically engage. On machines up to serial number 140.95.0125, it's controlled by a hand lever; from 140.95.0126 onwards, it's electrically controlled by a mushroom head pushbutton.
The water sprinkling system uses an electric pump to feed water through steel pipes and a pre-filter to the drum sprinklers. It can also operate by gravity. The water tank is made of stainless steel.
The driving position features a spacious and comfortable seat, offering good visibility on both sides. The steering wheel has an auxiliary knob. The dashboard includes an ignition key, an electric hour counter, and engine warning lights. The forward-reverse, brake, and accelerator levers are ergonomically positioned. From serial number 140.95.0126 onwards, a "driver present" safety device prevents machine movement when the operator is not seated.
The electrical system is powered by a 12 Volt, 48 Amp battery and includes a complete set of road and work lights. The dashboard controls consist of various switches for machine functions, with a fuse box for circuit protection. The main fuse (maxi fuse) is located inside the steering column.
The machine is equipped with a ROPS (Roll Over Protection Structure) frame and safety belts. Operators must wear the safety belt after adjusting it correctly. The ROPS frame is designed to protect the operator in case of rollover and must not be altered. It must be kept in the vertical position during operation.
When starting the machine, operators must be fully conversant with its controls, functions, and working conditions. The working area should be checked for hazards like slopes, uneven terrain, tree stumps, ditches, and hidden holes. The machine should only be used by qualified personnel. Before starting, check for leaks, and ensure handles, steps, and platforms are clean. Always use the provided steps and grips for climbing on and off. The exhaust system must be in good working order. When working in the dark, use all available lights. Before driving off, ensure no one is in the vehicle's path.
The machine should only be started when seated in the driver's seat, with the forward-reverse lever in the neutral position. Do not attempt to start the engine by short-circuiting the starter motor, as this can cause sudden, unexpected movements.
When driving on slopes or uneven terrain, maintain minimum speed and avoid sudden changes of direction. The machine has tipping limits of 25° (46% slope) for right and left, and maximum working limits of 19° (35% slope) for right and left, and 16° (30% slope) with vibrator or 25° (46% slope) without vibrator for front and rear.
For refueling, diesel fuel is flammable and must be handled with caution. Do not refuel near naked flames, sparks, or while smoking. Do not refuel with the engine running or hot. Clean up any spills immediately.
All maintenance operations must be performed by qualified personnel. The manual provides detailed instructions and specifies the required qualification level for each operation. Before any repair or maintenance, the engine must be stopped, switched off, and the parking brake applied. The battery should be disconnected using the isolator knob on the negative terminal, unless working on electrical equipment.
The minimum running-in period is 100 engine hours. During this period, allow the engine to idle for a few minutes after a cold start, ensure hydraulic oil reaches working temperature before starting work, avoid running the engine at maximum load for long periods, frequently check all fluid levels, and check the tightness of hydraulic connections, bolts, and the central steering joint. After the first 100 hours, change the engine oil, diesel fuel filter cartridge, engine oil filter cartridge, hydraulic oil filter cartridge, and vibrator box oil. These operations should be repeated after every subsequent 100 hours and after any general overhaul.
Regular maintenance includes:
For prolonged idleness, perform general cleaning, lubricate all grease nipples, fill the fuel tank completely, check all levels, remove diesel injectors and add engine oil to cylinders, charge the battery, store the machine in a sheltered place (or remove battery if outside), and periodically move the machine short distances to renew oil film on transmission components. Completely drain the water tank and sprinkling equipment. After prolonged idleness, all filters must be changed before returning to service.
Electrical maintenance involves using only original fuses of the prescribed current intensity. In case of power interruption, immediately switch off the machine. Do not work on the machine while the engine is running, hot, or moving. Disconnect power before adjusting or maintaining electrical equipment. When working on live electrical parts, ensure a second person is available to switch off power in an emergency and use only insulated tools.
Headlight alignment should be checked periodically. Position the roller on a level surface facing a white wall in the dark, mark two crosses at the center of the headlights, reverse 5 meters, and check dipped beam alignment. The center of each beam should be on the same vertical line as the cross, with a maximum divergence of 130 mm outwards. The line between the lit and dark area should be at least 20 cm below the crosses. Adjust using the three adjuster screws on the headlights.
General| Brand | Bitelli |
|---|---|
| Model | Pulcino DTV 310S |
| Category | Utility Vehicle |
| Language | English |
