Stringo electric vehicle movers: S2, S3, S5 series, AGVs, and Famek AB spare parts

Stringo mover equipment classification, model series, and wheel gripper geometry

Stringo AB (originally founded by Göran Fahlgrén as Famek AB in the late 1980s; headquartered and manufactured in Nyland, Kramfors Municipality, Sweden) is the world pioneer and benchmark manufacturer of pedestrian-operated electric vehicle movers.

Designed specifically to relocate passenger cars, commercial light vehicles, and chassis without starting their internal combustion engines or high-voltage electric drivetrains, Stringo equipment eliminates hazardous tailpipe exhaust emissions in enclosed spaces, prevents powertrain wear, and

prevents bumper or bodywork panel damage during close-quarters vehicle positioning.

The Stringo lineup is categorized across verified operational payload classes and industrial applications: the entry-level Stringo S2 (handling vehicles up to 2,000 kg) is tailored for automotive dealership showrooms, classic restoration ateliers, detailing studios, and museum collections; the

Stringo S3 series (up to 3,000 kg) handles intensive daily workshop rotations, commercial vehicle service, and proving grounds; the flagship Stringo S5 (up to 5,000 kg) addresses heavy armored limousines, light commercial delivery vans, and automotive plant End-of-Line (EOL) stations; while the

specialized 4WM and DuoMover configurations safely transport vehicles with all four wheels mechanically locked or EVs with depleted traction packs.

Accurate identification of Stringo movers and replacement gripper components requires the machine serial number plate affixed to the drive chassis, model code, and year of manufacture.

Factory technical documentation specifies precise roller throat widths, heavy-duty polyurethane roller diameters, hydraulic cylinder stroke dimensions, and onboard controller firmware revisions, ensuring seamless compatibility across all replacement assemblies.

Stringo S2 and S3 series electric movers: hydraulic lifting and maneuvering performance

Engineered on rigid low-profile structural steel chassis, the Stringo S2 and S3 allow technicians an unobstructed direct line of sight to vehicle tire contact patches during alignment.

Wheel lifting is driven by an onboard electro-hydraulic power pack actuating dual precision hydraulic cylinders equipped with pilot-operated load-holding check valves, preventing any uncommanded lowering even in the event of an electrical supply disruption.

The Stringo S2 incorporates sealed maintenance-free gel traction batteries or fast-swap lithium-ion modules providing up to 5 hours of continuous duty cycle.

Its direct-current drive motor coupled with a planetary reduction gearbox delivers smooth, jerk-free initial acceleration, which is critical when handling valuable collector classics, ultra-low ground clearance track supercars, or freshly painted body shells on alignment jigs.

The heavy-duty Stringo S3 is optimized for continuous 10-hour industrial duty shifts.

Its reinforced hydraulic gripper assembly accommodates wheel diameters ranging from R13 up to R24 and tire tread widths up to 350 mm, allowing safe maneuvering of large body-on-frame pickup trucks, armored luxury vehicles, and heavy premium SUVs with zero turning radius directly centered around the

mover drive wheel.

Flagship Stringo S5 series: Steer-by-Wire electronic control and AC motor drives

The flagship Stringo S5 electric vehicle mover delivers heavy-duty industrial towing capability up to 50 kN, maneuvering road vehicles weighing up to 5,000 kg with effortless control.

The S5 is widely deployed by global automotive manufacturers at final assembly inspection lines, experimental prototype test centers, and ballistic testing laboratories managing heavy armored government transport fleets.

A defining engineering milestone in the S5 is the complete implementation of Steer-by-Wire electronic steering.

By eliminating direct mechanical links and hydraulic steering columns, the system isolates the operator handle from physical kickback and floor vibration, granting millimeter-level positioning accuracy on laser wheel alignment benches and ADAS calibration rigs.

The powertrain utilizes a heavy-duty three-phase brushless AC induction motor regulated by an intelligent microprocessor inverter.

The AC drive architecture requires zero brush replacement, produces maximum rated torque from zero rpm, and features progressive regenerative braking that recaptures kinetic energy into the traction pack upon deceleration.

Specialized 4WM and DuoMover systems: four-wheel locked and disabled EV transport

Automotive crash-test facilities, post-incident forensic laboratories, and EV service centers frequently handle vehicles with completely immobilized drivetrains: automatic transmissions locked in Park, seized electric parking brakes (EPB), or severe suspension deformation prevent wheels from

rotating freely.

To overcome these mobility barriers, Stringo developed the 4WM (Four Wheel Mover) system and DuoMover auxiliary dollies.

The 4WM configuration engages all four wheels simultaneously: the primary electro-hydraulic mover captures the driven or steer axle, while low-profile DuoMover floating-roller dollies are positioned beneath the opposing wheel axle.

This configuration completely isolates all four tires from road contact, preventing gears, differential units, and traction electric motors from turning.

This isolation is mandatory when moving immobilized battery electric vehicles (BEVs such as Tesla, Zeekr, Li Auto, BYD, and Porsche Taycan), where forced wheel rotation would induce back-EMF spikes that could destroy expensive inverter power stages.

Automated Stringo AGV systems: industrial MES/WMS integration and plant safety

Driving smart manufacturing transformation under Industry 4.0 standards, Stringo offers autonomous driverless transport robots: the Stringo AGV (Automated Guided Vehicle).

Built upon the rugged mechanical underpinnings of the S3 and S5 platforms, Stringo AGVs incorporate advanced autonomous navigation suites featuring Class 1 Safety LiDAR scanners, SLAM optical vision, and high-precision wheel odometry.

Stringo AGVs connect directly to factory Manufacturing Execution Systems (MES) and Warehouse Management Systems (WMS) over secure industrial Wi-Fi or private 5G networks.

The AGV receives automated dispatch missions to transport unpowered painted car bodies or assembled vehicles between stamping, anti-corrosion dipping, curing ovens, and final quality audit stations.

A multi-tier safety architecture continuously monitors surrounding workspace zones, automatically reducing transit speed when personnel or obstacles are detected within 3 meters and triggering fail-safe emergency stops within 500 mm.

Open CANopen and industrial TCP/IP protocols allow seamless integration with plant safety PLC architectures.

Fire safety and TREK EV containment: emergency handling of battery thermal runaway

The proliferation of high-voltage battery electric vehicles presents critical safety challenges to fire rescue teams, underground parking facilities, and automotive logistics hubs: the acute risk of lithium-ion battery thermal runaway.

Battery pack fires generate intense toxic gas plumes, rapid thermal spikes exceeding 1,000°C, and secondary cell explosion risks.

The specialized Stringo TREK EV emergency mover enables response teams to engage the wheel assemblies of a smoking, compromised, or burning EV remotely, extracting the vehicle from enclosed parking decks, service bays, or production halls into outdoor containment submergence tanks without placing

personnel inside the immediate danger perimeter.

All structural components of the TREK EV in close proximity to the vehicle feature heat-resistant alloy shielding, hydraulic lines encased in volcanic basalt fire sleeves, and redundant high-temperature electrical harness insulation.

The system protects manufacturing assets and infrastructure from catastrophic fire losses.

Genuine Famek and Stringo spare parts: hydraulic valves, grippers, and contactors

To maintain operational uptime across decades of heavy duty, original equipment manufacturer Famek AB manufactures a comprehensive catalog of genuine spare parts and overhaul kits. The modular mechanical design enables efficient subassembly replacement directly on customer premises.

Standard replacement items include: left-hand and right-hand articulated wheel gripper arms assembled with high-durability polyurethane load rollers; hydraulic lift cylinder rod assemblies and seal kits; compact Bucher and Bosch Rexroth 24V electro-hydraulic pump units; and proportional solenoid

control valves.

Electrical spares encompass OEM keyed ignition lock assemblies, heavy-duty Albright main power contactors, emergency stop switches, precision rotary angle encoders for Steer-by-Wire tillers, and battery charging circuit breakers.

Using authentic Famek parts preserves certified lifting capacity and prevents premature tire slippage during transport.

Routine maintenance intervals, sensor calibration, and turnkey international delivery

Scheduled preventive maintenance for Stringo electric movers is recommended every 250 operating hours or semi-annually under intensive multi-shift usage.

Maintenance procedures specify checking ISO VG 32/46 hydraulic fluid levels, inspecting cylinder rods for scoring, lubricating pivot sleeve bearings with moisture-resistant lithium grease, and testing traction battery discharge capacity.

On S5 and AGV models, routine servicing includes zero-point electronic calibration of Steer-by-Wire tillers, cleaning optical surfaces of safety LiDAR scanners, and verifying insulation resistance across the AC motor power cabling.

Periodic inspection of polyurethane gripper rollers prevents flat-spotting and maintains low rolling resistance.

We supply authentic Stringo electric vehicle movers, AGV platforms, DuoMover dollies, and complete Famek AB spare parts catalogs to automotive manufacturing facilities, proving grounds, testing laboratories, and service networks globally.

We provide transparent commercial contracts, comprehensive technical documentation, and expedited international logistics to your facility.