The truck mixer pump TWINSTAR 4Z33 has the longest boom of the range in 4 sections with "Z" folding type and pipeline Ø 112.5 mm. The TWINSTAR 4Z33 is suitable for urban construction sites with difficult access thanks to the stabilization front and rear "telescopic outriggers" type. 
Perfect assembly on truck 4 axles with wheelbase 4.250 - 4.550 mm
Drum high load capacity with elliptical bottom with nominal capacity 7 m³. The pumping groups have high reliability up to 80 m³/h concrete output and pressures till to 80 bar.



Main features

  • Mixer pump produced, assembled and tested by SERMAC
  • Structural integrity verified with the Finite Element Method (FEM)
  • Pump frame designed for high torsion rigidity
  • Suitable for assembly on 4-axle trucks
  • Boom 4-stage, Z-folding type
  • Pipeline diameter Ø 112,5 mm (4”½)
  • Main components sourced from genuine German and Italian manufacturers
  • Pumping unit with open hydraulic system and high manganese cast iron S-valve
  • Drum with high load capacity, made with 4 bands to reduce the wears, with elliptical bottom in steel and cone to reinforce the attack flange reducer
  • Ideal for working in tight spaces

Standard dotation

  • Horizontal telescopic front and rear outriggers type
  • Straight pipes made in single-wall steel. Elbows made in manganese alloys with highly abrasion resistant and differentiated thickness
  • Two sets of radio remote controls provided with 2-speed proportional boom control, automatic free frequency search, 8-position joysticks and concrete output control
  • Wear compensation system between wear plate and wear ring. Wear plate and wear ring with tungsten carbide inserts
  • Automatic hopper greasing unit with manual back-up system
  • Automatic oil lubrication for piston rams
  • Safety device on hopper door and hopper grate
  • Electric vibrator on hopper grate
  • Multi-stage water pump (130 l/min - 40 bar)
  • Work light on hopper
  • Metal bin for accessories beside hopper
  • Warning horn on the boom
  • Accessories for cleaning and maintenance
Specifications subject to change without prior notice, no responsibility is taken for the correctness of this information.

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