PRONAR trailer T663/3 & T663/3 SILO

PRONAR trailer T663/3 is a modern trailer type characterized by: three way tipping system, central locking system , durable  walls and a unloading window in the tailgate. Ideally designed for transporting agricultural products, particularly for corn, grain etc. The trailer is designed as a tandem  which  makes maneuvering easy. Stable ball tipping system, load-bearing frame profiles of high quality, reliable and durable axles are the factors that distinguishes  PRONAR  products from other products on the market.

T663/3 is produced in SILO version aslo. PRONAR T663/3 SILO has additional side walls, which together with hydraulic tailgate increasing its functionality.


Technically permissible total weight: 14000 [kg]
Permissible total weight: 13660 [kg]
Load capacity: 10000 [kg]
Empty weight: 3660 [kg]
Load volume: 11,8 [m 3]
Loading space: 9,8 [m 2]
Loading case inside lenght: 4440 [mm]
Loading case inside width: trapez: 2190/2240 [mm]
Overall dimensions (lenght/width/height): 6154/2390/2579 [mm]
Sidewall height: 600+600 [mm]
Floor/wall thickness: 5/2,5 [mm]
Platform height, measured from the ground: 1320 [mm]
Wheel track: 1700 [mm]
Suspension: Leaf springs
Hitch-ring load: 1880 [kg]
Tyres: 385/65 R22,5 (15R22,5) Regenerowane
Maximum speed: 40 [km/h]
Tipping system : 3-side
Tipping cylinder (stroke / oil demand / pressure) 1700/13L/200bar
Tractor power requirement: 72,8/53,5 [hp/kW]
Tipping angle (backwards/sides): 50/46 [˚]

Standard equipment
Loading case with universal system of opening walls
3-side tipping system of the loading case with ball joints with the rear shock absorbers of optimum spacing
Selection of the direction of tipping by two pins protecting against incorrect handling
Trapezoid shape of the loading body (chest expands by 50 mm in the rearward direction)
Reinforced floor panel with central locking mechanism
Type of chassis: rectangular with closed profiles with fixed drawbar made of high resistant steel
Tandem suspension on 4 leaf springs, wheelbase 1160mm, fixed axles equipped with drum brakes
Axles 60 km/h
Universal fixed drawbar to connet with the lower or the upper hitch of the tractor
Drawbar towing hitch: rotary with ∅50 towing eye
Drawbar support: hydraulic scissor-type with movable leg and security hydraulic lock
Braking system: double pneumatic line
Crank hand brake
12 V lighting system with rear electric socket
Rear lamps with protective grating
Coiled connecting cable lighting system
Hydraulic tipping system with cut-off valve
Tipping servo-motor of 3-side tipping system
Service support of the Tool box
Sidewalls and extensions made of profile PF600mm+600mm, 70 mm from the rim, with forged hinges and locks
Closed spaces of the sidewalls and extensions protected by laser weld
Sidewalls fastening string
Rear grain hatch with a lever in a rear wall
Rear mudguards
Wheel chocks + galvanized racks (2 pcs)
Double-component chemically hardened painting materials, UV-resistant
Tipping frame coulou: red RAL 3000 PRONAR
Sidewalls painting colour: green RAL 6010 PRONAR
Ladder and steps facilitating the access to the loading case

Additional equipment

Drawbar hitch: fixed with towing eye Ø40 mm
Additional extensions made of profile PF600mm
Silo-type sidewalls extensions with loading case 16m 3, sidewall 1600mm, hydraulically driven tailgate 1900mm (only with 400/60-15,5 tires)
Braking system: double line pneumatic with ALB
Clearance lights
Operator’s platform
Grain chute
Springs facilitating opening the sides
Rear couplings for second trailer
Rear manual hitch
Rear automatic hitch AH 31H-4
Rear automatic hitch AH 38H-4
Tyres 385/65R22,5
Tyres 500/45-22,5 JEST W KARCIE
Spare wheel (separetly) 385/65 R22.5 (15 R22.5)
Spare wheel (separetly) 385/65 R22.5 (15 R22.5) RE
Spare wheel (separetly) 500/45-22,5 JEST W KARCIE
Side underrun protections
Additional plastic front mudgards – the wheels of a wheelset tandem JEST W KARCIE
Warning triangle JEST W KARCIE
Auger for unloading grain with efficiency 30 t/h* JEST W KARCIE
Chute over the entire width on the back of the trailer
Window in the front side wall extension (340×710) with grating and PLEXI
Window in the front extension and in the front of the middle side wall extension (340×710) with grating and PLEXI
Rolled cover with frame and side supporting pipes
Drawbar support: mechanical telescopic with fixed leg
Set of wall supports to maintain the walls in a partially open position for bale transportation**
Shock absorber for falling potatoes – two sets of rubber belts, 1,8m of length each, mounted on the sidewall extensions (side extensions necessaary)
Non standard colours according to RAL CALSSIC codes

* mounted on the rear wall, two-segmented, folded, with mechanical winch, auger driven hydraulically, oil requirement 30L/min
** for agricultural roads only