Boom Specification – Roll-and-Z-Fold Design

Height & Reach21X-4R
Vertical reach20.5 m67'3″
Horizontal reach17.2 m56’5″
Reach from front of truck14.5m47' 7"
Reach depth11.6 m38’1″
Unfolding height4.4 m14′5"
Boom Section Articulation
1st section articulation90 °
2nd section articulation180 °
3rd section articulation240 °
4th section articulation247 °

 Boom Section Length
1st section length5.7 m18'8”
2nd section length3.8 m12’6″
3rd section length3.8 m12’6″
4th section length3.9 m12'10"
General Specs
Pipeline size (ID) metric ends125 mm5″
Rotation360 degree non-continuous swing
End hose – length3 m10’
End hose – diameter125 mm5″
Front Outrigger Spread: Swing out, telescope & extend down4 m13'1″
Rear Outrigger Spread: Swing & extend down2.9 m9’6″

Pump Specifications

Outputrod side
piston side
93 m3/hr
58 m3/hr
122 yd3/hr
76 yd3/hr
Pressurerod side
piston side
92 bar
148 bar
1,334 psi
2,147 psi
Material cylinder diameter200 mm8″
Stroke length1400 mm4’7”
Strokesper minute
rod side
piston side
1 minute
Volume ControlZero to full
Hydraulic system pressure350 bar5,075 psi
Differential cylinder diameter130 mm5″
Rod diameter80 mm3″
Maximum size aggregate60 mm2.4″

21-Meter R-Fold Concrete Boom Pumps

The 21X-4R concrete boom pump is the ideal choice for residential and commercial construction job sites requiring less range and more mobility. This 21-meter concrete boom pump features a four-section, roll and fold  boom that provides maximum versatility. The pump is designed to unfold and open in tight spaces and can unfold under a 19 foot ceiling height, making it perfect for working in and around existing structures as well as under bridge decks and other overhead obstructions.


What Benefits Does the 21X-4R Concrete Boom Pump Provide?

If you’re in the construction business and need a fast, efficient method for pouring concrete, our 21-meter concrete boom pump offers the following benefits:

Request A Pump Quote Now

Choose from multiple chassis options to fit the pump onto vehicles from leading manufacturers including Mack, Western Star, Freightliner and Kenworth.


Pump Working Range

Photos and drawings are for illustrative purposes only. Dimensions will vary with different truck makes, models and specifications. For available options, please contact the factory.

Operator Friendly HBC Radio Remote

financing options available view our latest brochure
request a custom quote today

Chassis Options