Trailer PRONAR T663/4 & T663/4 SILO

Why would improve something that is good? Because the world is constantly  changing, and the technical  world even more rapidly. PRONAR T663/4 trailer  was created as enhanced version of the T663/1. We have improved maneuvering characteristics of the trailer as well as its stability.

A customer who chooses  a PRONAR T663/4  can be sure that in comparison with the model T663/1  the trailer will have a larger capacity (up to 10420 kg),will be  more stable (increased spacing , parabolic springs, extended frame bottom, increased wheelbase), a lower loading height – in  standard option , loading height is  lowered by 120 mm to 1185 mm)

  1. 1
    Is ensured by extended frame, parabolic springs, increased wheelba.
  2. 2
    By lowering the trailer frame, the height of the trailer floor reduced by 120 mm relative to the a standard trailer T663/1.
  3. 3
    Simple, but well designed and durable construction ensures long trouble-free use.
  4. 4
    Trailer can be equipped with a hydraulic tailgate which in combination with additional sidewalls provides a loading volume of almost 16 m3.
  5. 5
    The customer can order additional equipment, which increases the use of trailers.
Technical data
Permissible total weight: 14000 [kg]
Load capacity: 10420 [kg]
Empty weight: 3580 [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): 6230/2390/2445 [mm]
Sidewall height: 600+600 [mm]
Floor/wall thickness (mm) : 5/2,5 [mm]
Platform height, measured from the ground: 1185 [mm]
Wheel track: 1800 [mm]
Suspension: parabolic springs
Hitch-ring load: 2000 [kg]
Tyres: 15,0/70-18
Maximum speed: 30 [km/h]
Tipping system : 3-side
Tipping cylinder (stroke / oil demand / pressure) 1830/15L/200bar
Tractor power requirement: 67,6/49,7 [hp/kW]
Tipping angle (backwards/sides): 50/45 [˚]
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
Reinforced floor panel with central locking mechanism
Trapezoid shape of the loading body (chest expands by 50 mm in the rearward direction)
Type of chassis: Rectangular with closed profiles with fixed drawbar
Universal fixed drawbar to connet with the lower or the upper hitch of the tractor
Tandem suspension on 4 parabolic springs, wheelbase 1170mm, fixed axles equipped with drum brakes
Drawbar towing hitch: with rotary ∅50 towing eye
Drawbar support: hydraulic scissor-type with movable leg and security hydraulic lock
Braking system: double line air
Crank hand brake
12 V lighting system with rear electric socket
Rear lamps with protective grating
Coiled connecting cable lighting system
Tipping system with cut-off valve
Tipping servo-motor of 3-side tipping system
Sidewalls and extensions made of profile PF600mm+600mm, 70 mm from the rim, with forged hinges and locks
Service support of the Tool box
Closed spaces, walls 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
Chassis color red RAL 3000 PRONAR
Sidewalls color green RAL 6010 PRONAR
Ladder and steps facilitating the access to the loading case
Additional equipment (optional)
Drawbar hitch: fixed with towing eye Ø40 mm
Silo-type sidewalls extensions with  loading case 16m 3, sidewall 1600mm, hydraulically driven tailgate 1900mm
Additional extensions made of profile PF600mm
Braking system: double line air with ALB
Clearence lights
Operator’s platform
Rear grain chute
Springs facilitating opening the sides
Rear couplings for second trailer
Rear manual hitch with shock absorption
Rear automatic hitch AH 31H-4
Rear automatic hitch AH 38H-4
Spare wheel hanger
Tyres 385/55 R22,5
Tyres 385/55 R22,5 RE
Tyres 500/50-17
Spare wheel (separetly) 15,0/70-18
Spare wheel (separetly) 385/55 R22,5
Spare wheel (separetly) 385/55 R22,5 RE
Spare wheel (separetly) 500/50-17
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
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
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 back wall, two-segment, folding, mechanical winch, hydraulic-powered auger, the demand for oil 30 L / min
** for agricultural roads only
  • Download PDF FileOperating instructions