we keep your loading arms in top condition

With a large group of specialized service technicians we ensure that your equipment remains in top condition. We are available 24 hours a day and 7 days a week and can be on site within 2 hours.

We are always available and can start immediately:

  • Breakdown failure prevention
  • On site within 2 hours (Benelux)
  • Parts of all brands in stock
  • 20 fully-equipped service vehicles available
  • Yearly (preventive) maintenance
  • 24/7 On-call service
  • Management of client (specific) stock
  • Maintenance on gangways

Overhauls, performed with an eye for detail and knowledge of all brands

  • 5000 m² overhaul workshops based in Rotterdam and Antwerp
  • 40 ton lifting capacity
  • Own quay for erection and factory testing
  • Full disassembly and inspection
  • Digital measurement of clearances and wall thickness
  • Inspection of overall integrity of construction parts
  • Preparation of overhaul proposal
  • Replacement of parts susceptible to wear
  • Assembly and complete functional testing
  • Complete online digital manufacturing data record(JLS App)


Ultimate makeover: modification and upgrading of loading and unloading equipment

Does your current loading facility no longer suit your demand
Oftentimes modification of your current system turns out to be a less costly and more efficient solution. Our engineers and specialists are at your service.


  • Modification of hydraulic system
  • Modification of operating system
  • Installation of quick connect/disconnect equipment
  • Vapor return upgrade
  • Modification of working envelope
  • PLC modifications
  • Ergonomic modifications
  • Engineering for loading arms
  • Installation of ERC-systems
  • Integration of operating/control system

3D scanning

In one day your entire jetty digital, it’s possible with a 3D scan.

We scan your jetty from € 999
Speed, accuracy and flexibility are keywords for 3D scanning.
The engineers who perform the 3D scan are also responsible for developing the scan results. This provides a highly efficient way of working and a great commitment. From onshore to o shore, everywhere in the world.

technical support

Assistance at assembly and installation of new equipment

If there arises a capacity problem for assembling, installing or dismantling, our specialists can be of assistance.


  • Assembly of new equipment supplied by third parties
  • Installation of new equipment supplied by third parties
  • Delivery of supervisors
  • Assistance at lifting plan preparations
  • Removal and dismantling of old equipment
  • 24/7 service

No matter where you are, there’s worldwide support right around the corner.

global service centers

Local Service Centers
With an extensive global network of service centers, JLS is your ideal local service partner. Our Service support coordination team ensures operational reliability and high performance of their loading systems, regardless of the original manufacturer.

Resources and facilities
Our workshop facility in Al Jubail, Saudi Arabia, is fully equipped to overhaul and repair all types of loading systems. This modern facility enables us to produce locally parts for all models and sizes of loading equipment.

JLS’ global network of spare parts manufacturing centers provides support for additional spare parts.

Our dedicated and competent team of engineering, contract administration and sales staff provides in-house services for a wide range of hydraulic and mechanical problems.

For more complex projects, JLA loading technology, also a J. company, provides industry-leading mechanical design and hydraulic & controls support

core competences


  • Repair and refurbish all types of loading equipment, regardless of the original equipment manufacturer
  • Upgrade of equipment performance and materials in line with changing global and local regulations
  • Skilled field personnel for on-site service, including overhauls, installation and commissioning, machinery diagnostics, and troubleshooting

Response Time & Quality

  • 24/7 emergency response coverage through a convenient 24/7 hotline
  • Tailored engineering solutions to enhance equipment reliability and performance
  • Management services in association with long-term equipment support contacts
Mart van Cleemputte

Manager JLS loading arm service

Jacko de Vries

Director Specialties

Edwin van der Ster

Operations Manager Netherlands

More J. de Jonge specialties

JLA loading technology

The JLA Marine Loading Arms are designed with minimal CAPEX and OPEX. All supported by the largest 24/7 service crew in the world.

JRS rotating service

We keep your rotating equipment in top condition