Trailer PRONAR T663/1 & T663/1 SILO

More and more customers appreciates usefulness of the trailers with tandem suspension due to its advantage on rough terrain. More pressure on the tractor hitch in tandem trailer makes easy maneuvering in difficult terrain and increases the pulling power of the tractor. Trailer PRONAR T663/1, also has a three way tipping system, and at the loading case has low suspension. All this makes the trailer extremely stable and easy to work with.

Trailer PRONAR T663/1 is also available as a silo version with a capacity of 16 m³ load. It stands out with a  hydraulically raised rear wall and hydraulic locks that protect against uncontrolled tailgate drop in case of oil pressure decrease.


Technical data
Technically permissible total weight: 14000 [kg]
Permissible total weight: 13290* (12000**) [kg]
Load capacity: 10000 [kg]
Empty weight: 3290 [kg]
Load volume: 11,8 [m 3]
Loading space: 9,8 [m 2]
Loading case inside lenght: 4440 [mm]
Loading case inside width: trapezoid: 2190/2240 [mm]
Overall dimensions (lenght/width/height): 6116/2390/2484 [mm]
Sidewall height: 600+600 [mm]
Floor/wall thickness (mm) : 5/2,5 [mm]
Platform height, measured from the ground: 1250 [mm]
Wheel track: 1700 [mm]
Suspension: Leaf springs
Hitch-ring load: 1860 [kg]
Tyres: 15,0/70-18
Maximum speed: 30 [km/h]
Tipping system : 3-side
Tipping cylinder (stroke / oil demand / pressure) 1700/13L/200bar
Tractor power requirement: 67,6/49,7 [hp/kW]
Tipping angle (backwards/sides): 50/46 [˚]
* for trailers with maximum speed 30km/h
**for trailers with maximum speed 40km/h
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 that protects against incorrect handling
Trapezoidal shape of the loading case ( chest expands by 50 mm in the rearward direction ), reinforced floor panel
Reinforced floor panel with central locking mechanism
Frame: rectangular with closed profiles made of high resistant steel
Sidewalls and extentions made of high quality, strong, laser welded profiles each PF600mm, made of profiled sheets; with stable rear pillars; with forged hinges and locks
Closed spaces of the sidewalls and extensions protected by laser weld
Support service of the tool box
Sidewalls fastening string
Rear grain hatch with a lever in a rear wall
Tandem suspension on 4 leaf springs, wheelbase 1160mm, rigid axles equipped with drum brakes
Universal rigid drawbar to connect with the lower or the upper hitch of the tractor
Drawbar towing hitch: rotary with fixed ∅50 towing eye
Drawbar support: hydraulic supporting leg (scissor)
Drawbar support: hydraulic supporting leg (scissor)
Braking system: double air line
Parking crank hand brake
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
Telescopic servo-motor of 3-side tipping system
Rear mudguards
Wheel chocks + galvanized racks (2 pcs)
Double-component chemically hardened painting materials
Tipping frame colour: red RAL 3000 PRONAR
Side walls painting colour: green RAL 6010 PRONAR
Mechanical support of the loading case
Ladder and steps facilitating the access to the loading case

Additional equipment

Additional equipment (optional)
Axles for 40 km – Gross weight 12000kg
Silo-type sidewalls extensions
Drawbar towing hitch: towing eye Ø40
Additional sidewalls extensions made of profile PF600mm ( volume up to 17,6m3)
Braking system: double line air with ALB
Lighting system with clearence lights
Operator’s platform at the front wall
Grain chute
Springs facilitating opening the sides
Rear manual, hitch witch shock absorption
Rear automatic hitch AH 31H-4
Rear automatic hitch AH 38H-4
Rear couplings for second trailer
Spare wheel hanger*
Tyres 385/55 R22,5
Tyres 385/55 R22,5 Regenerated
Tyres 500/50-17
Spare wheel (separately) 15.0/70-18
Spare wheel (separately) 500/50-17
Spare wheel (separately) 385/55 R22.5
Spare wheel (separately) 385/55 R22.5 RE
Side underrun protections
Additional plastic front mudgards – the wheels of a wheelset tandem
Warning triangle
Auger for unloading grain with efficiency 30 t/h**
Chute over the entire width on the back of the trailer
Window in the front side wall extension (340×710) with grating and PLEXI
Rolled canvas cover with frame and folded central and sides supporting pipes
Window in the front extension and in the front of the middle side wall extension (340×710) with grating and PLEXI
Set of wall hangers 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
*not available with operator’s platform
** mounted at the back wall, two-segment, folding, mechanical winch, hydraulic-powered auger, the demand for oil 30 L / min
*** for agricultural roads only