S 39 SX by Schwing


S 39 SX by Schwing

Concrete Pump Details

Boom Specifications
4 Sections
Vertical Reach
127 ft
Reach From Front
Unfolding Height
29′ 2″
All Hydraulic
Front Spread
7.9m (26')
Rear Spread
6.5m (21')
Pump Specifications
Concrete Cylinder Diameter
Cylinder Stroke Length
2500mm (98")
Number of Strokes/Min
Main Oil Pump
Hydraulic System Pressure
Lube System (Hopper)
General Specifications
Water Tank
Seller Note

4-Section Roll and Fold®

The original and for many contractors the best all around boom type for fast unfolding, easy cleanout and precision placement.

MODELS: S 32 X, S 36 X, S 39 SX,


Optional Detachable Boom

Detachable boom option that allows the boom to be easily removed and mounted hundreds of feet from the pump.

Maximize the utilization of your S 39 SX with the detachable boom option that allows the boom to be easily removed and mounted hundreds of feet from the pump. Multiple mounting options provide for free-standing, form-mounting and self-climbing configurations. The detachable boom option is accompanied by the 2023-5 130/80 MPS pump kit with high pressure capabilities for pumping high-rise structures. By stretching a full 114 (S 39 SX) from the slewing axis the placing boom covers more than 40,000 square feet (S 39 SX) from a single set-up. Weight of the Generation 2 separate placing booms have been reduced dramatically to 12,890 lbs (S 39 SX). With simple four-pin mounting these booms can be flown quickly to multiple masts with the quick-disconnect feature.


Super X Outriggers

Incorporates Schwing’s exclusive Super X Outriggers® that set-up fast and provide a compact and stable platform for pumping.

Exclusive Super X Outriggers® set-up fast and provide maximum stability with a smaller footprint for more effective pumping on tight job sites. These curved front single-stage outriggers telescope out and around obstacles allowing placement of the pump as close to the pour area as possible. This means maximum utilization of the boom reach and more yards of concrete poured from a single set-up. By retracting along the sides of the truck chassis, the Super X Outriggers® allow for the large diameter, long stroking material cylinders down the center of the pump that provide smooth operation and less wear than conventional concrete pumps.


Generation 3 Pump Kit

Outperforms every other concrete pump on high visibility projects while also placing millions of yards on everyday pours.

Proper cooling of the hydraulic oil is critical to continuous operation under demanding conditions. In addition, filtration is the single most important method of keeping the hydraulic system operational. That’s why the Schwing G3 design continuously draws hydraulic oil from the tank and circulates it through the filter and high efficiency cooler. Even when the concrete pump is not engaged, this separate hydraulic circuit continues to operate for protection and performance.

Redesigned for 800 LPM of oil, the 3 High Flow Control Block is the brain for the all hydraulic system. The block incorporates the Soft Switch into the relief valve and the accumulator manifold into the S3 spool valve for a compact, simpler design. Multi Port Shifting is an important part of the twin circuit system, which uses accumulator pressure to switch the S3 valve. Faster switching of the S3 translates to smoother pumping. The S3 block and system accumulator are separated from the control block and located near the hopper for easy access.

The material cylinders contain rubber rams that are connected to the differential cylinder rods. One side will push the concrete through the Rock Valve™ while the opposite side will draw concrete from the hopper. Now available with up to 10 inch (250mm) diameter and 98-inch (2500mm) stroke length, G3 pumpkits deliver 30% more concrete with every stroke than competitive brands. Fewer strokes translate to smoother pumping, less wear and longer boom life.

The hydraulic pumps for the concrete pump circuit are bent axis, variable displacement, piston pumps. They are horsepower controlled, which means that as pressure rises towards maximum, the flow can decrease, so the power consumption remains constant. This pump assures that the truck engine will not bog down under difficult pumping conditions. The pump also accepts external signals from the hydraulic stroke limiter for control of the output.


Vector Controls

Valuable operational data at your fingertips to allow monitoring of the pumping process from the remote control box.

Operators are fully informed of the pump’s status even when they are hundreds of feet from the pump. No need to shutdown and return to the pump when an operator can view the following critical information at the remote box:

• Strokes per minute
• Hydraulic pressure
• PTO rpm
• Hydraulic oil temperature
• Hopper grate status
• Local/remote/ram change modes
• Switches out of neutral
• Emergency stop activation
• Low water tank

Significant features for fleet owners include one transmitter box for radio or cable operation, a small battery charger in the truck cab, 8-hour long work cycles with two-way communication, safe radio transmission with frequency hopping, easy change out of transmitters and one system for all types of booms.

A High level alarm notifies the operator of situations that may cause damage to the pump. The VECTOR will activate the Emergency Stop and the operator can evaluate the situation. In all cases the operator has the display on the remote box and the VECTOR graphic displays to assist in diagnosis.

Modular Design

VECTOR is proven durable and reliable, but in the event of physical damage, the modular design allows the entire control box to be unplugged and replaced in the field. All control systems will be fully operational with the replacement controller.

Rock Valve™

No other sequencing valve combines lowest cost per yard maintenance costs and ease of rebuilding as the Rock Valve™.

Only Schwing matches the correct valve type to the requirements of the pump:


Big Rock Valve™

Big Rock ValveThe Big Rock Valve™ is standard on all boom pumps with booms 31-meters and longer and optional on other models. This feature extends the valve and housing to easily keep up with the requirements of high volume pours even with the harshest mixes. The patented design keeps the Rock Valve™ in adjustment automatically to maintain pressure on the concrete for long-term, trouble-free operation.


Optional Tremie Boom

A special tip section allows the S 39 SX to accommodate up to a 45-foot tremie pipe providing the pipe’s wall thickness is not more than .125-inches. This option eliminates the need to support the tremie with a crane while pumping.

A special tip section allows the S 36 X to accommodate up to a 45-foot tremie pipe providing the pipe’s wall thickness is not more than .125-inches. This option eliminates the need to support the tremie with a crane while pumping. The tremie method of concrete placement immerses the pipe in fresh concrete so that the rising concrete from the bottom displaces the water without washing out the cement content. The method is often used to pump caissons.

The S 36 X with 4-section Roll and Fold boom offers 115’6” of vertical reach in standard configuration and 101-feet with the tremie tip section. The key reason a Roll and Fold boom works best for tremie applications is the full 180 degrees articulation at the 2/3 knuckle is on the working side of the boom.