Crane Safe Load Indicator (SLI) Repair Services
Repair and calibration of safe load indicators, load moment indicators (LMI) and overload protection systems for EOT, mobile, tower and hydra cranes. Emergency repairs in 24–48 hours.
A crane safe load indicator stops your operators from lifting more than the crane can safely handle. When it fails, the crane either can't work or works without protection. GRD Solutions repairs crane SLI systems for plants, ports and project sites across India, and gets your crane back to safe operation fast.
The SLI goes by many names: automatic safe load indicator (ASLI), load moment indicator (LMI), rated capacity indicator (RCI) or overload protection system. We repair all of them. Our engineers fix display units and control boards, load cells, angle and length sensors, anti-two block switches and overload cut-out circuits, then calibrate the system to your crane's rated capacity.
Every repaired SLI is tested under simulated load and verified at the rated cut-out point before it goes back on your crane.
Safe Load Indicator Repair for Every Type of Crane
SLI Repair and Calibration Services
Display and control unit
- SLI display unit repair and replacement
- Control board and PCB repair
- Communication and interface card repair
- Power supply repair inside the SLI unit
Sensors and load cells
- Load cell repair, replacement and calibration
- Boom angle sensor repair and replacement
- Length sensor and cable reel repair
- Anti-two block (A2B) switch repair
Safety circuits and wiring
- Overload relay and cut-out circuit repair
- Wiring harness and connector repair
Calibration and testing
- SLI calibration to the crane's rated capacity and load chart
- Load cell signal calibration and overload threshold setting
- Testing under simulated load and verification at the cut-out point
SLI and LMI Brands We Repair
Common Safe Load Indicator Problems We Fix
Call us if your crane SLI shows any of these faults:
SLI showing wrong load, a fluctuating reading or a zero reading
Load cell error on the display
SLI not cutting off at overload, or the overload alarm not triggering at rated capacity
Alarm sounding all the time, or not at all
Angle sensor error, or a wrong boom angle or radius on the display
Anti-two block (A2B) error or a length sensor fault
SLI not powering on, or a blank display
Crane SLI not working after a power surge, water ingress or cable damage
A faulty SLI is a safety risk and can stop the crane from passing inspection. Most of these faults can be repaired at component level.
Fast SLI Repair to Get Your Crane Back to Work
How our crane SLI repair works
Send the unit or call us
Courier the display, control unit or sensors to our workshop from anywhere in India.
Free evaluation
Our engineers inspect the system and find the exact fault, down to component level.
Written fault report and quote within 24 hours
No work starts without your approval. No fix, no fee.
Repair
We repair or replace the faulty boards, load cells, sensors or wiring.
Calibrate and test
We calibrate the load cell signal, overload threshold and cut-out point, and test under simulated load.
Deliver with warranty
Every repair carries a warranty.
Why Choose GRD Solutions for Crane Repair
- SLI specialistsDisplays, load cells, sensors and safety circuits, all in one place
- Component-level repairUsually far cheaper than a new SLI system, and the only option for older units
- Calibrated to your craneEvery repair is set to your crane's rated capacity
- 12+ years in industrial electronics repair, with 600+ products repaired across 25+ brands
- Free evaluation, written quote within 24 hours, no fix no fee
- Warranty on every repair and a 30-minute average response to enquiries
- One partner for your crane electronicsWe also repair VFDs, PLCs, HMIs and power supplies
Industries We Serve
We repair safe load indicators as part of crane maintenance for:
Regular SLI calibration is part of good crane preventive maintenance and helps your cranes pass lifting equipment inspections.
Crane SLI Repair — Frequently Asked Questions
What is an SLI in a crane?+
SLI stands for safe load indicator. It measures the load on the crane and compares it with the crane's rated capacity. If the load goes over the safe working load, it sounds an alarm and cuts out the lifting motion.
How does a safe load indicator work?+
A load cell or pressure sensor measures the load. On mobile cranes, angle and length sensors also measure the boom position. The SLI unit compares these readings with the crane's load chart and triggers the alarm and cut-out before the crane is overloaded.
What is the difference between an SLI and an LMI?+
An SLI checks the load against a fixed capacity, which suits EOT cranes and hoists. A load moment indicator (LMI) also uses boom angle and length, because a mobile crane's safe load changes with its radius. We repair both.
What does SWL mean on a crane?+
SWL is the safe working load: the maximum load the crane is rated to lift in a given configuration. The SLI is set to warn and cut out at this limit.
Can a faulty SLI be repaired, or does it need replacing?+
Most faults can be repaired at component level, including displays, boards, load cells and sensors. Replacement is needed only when a unit is badly physically damaged.
Do you calibrate the SLI after repair?+
Yes. We calibrate the load cell signal, overload threshold and cut-out point, and test the system under simulated load before dispatch.
How often should a crane SLI be calibrated?+
Calibrate it after any repair or sensor replacement, and check it at every periodic crane inspection. Follow the crane maker's schedule and your inspector's requirements.
Which SLI brands do you repair?+
PAT, WIKA Hirschmann, Wylie, Robway, Moba and other RCI systems, as well as Indian-made safe load indicators on EOT cranes, hoists and hydra cranes.
How long does SLI repair take?+
Standard repairs take 3–5 working days. For cranes on critical jobs, we offer emergency repair in 24–48 hours.
Do you repair SLIs from other states?+
Yes. We serve customers across India. Courier the SLI unit and sensors to our workshop and we ship them back after repair and calibration.
Trusted Experts for Your Equipment
Trusted by industries across India since 2014. Most quotes sent within 24 business hours.