JS Custom Machine & Auto System Co., Ltd. provides inspection, repair and overhaul of pneumatic cylinders for machinery and automation systems in industrial plants. The service covers diagnosing the cause of a fault, disassembly, cleaning, replacing seals and necessary parts, restoring components, and function testing within the scope agreed with the customer, to help reduce the risk of machine downtime and keep maintenance costs under appropriate control.
Scope of Service
01 | Inspection & Diagnosis
Check for leakage, pressure drop, abnormal piston rod movement and incomplete stroke
Check the condition of the piston rod, cylinder bore, end covers, mounting points and end-of-stroke cushioning
Assess the repair approach and its value compared with replacing the cylinder
02 | Disassembly & Cleaning
Disassemble according to the structure and specifications of the model
Clean oil residue, dirt and deposits using methods suited to the material
Check threads, seal grooves, contact surfaces and component parts
03 | Seal & Parts Replacement
Inspect and replace Piston Seals, Rod Seals, O-Rings, Wiper Seals and Wear/Guide Rings as needed
Source parts by size, material and code confirmed as compatible
Propose replacing the piston rod, end covers or damaged parts when they are not suitable for repair
04 | Repair & Reassembly
Assess scratches, corrosion, rod straightness and cylinder surface condition
Restore only the areas that can be repaired safely, or propose replacing parts beyond the acceptable limit
Reassemble according to the procedure and technical specifications of the equipment
05 | Testing & Handover
Test for leakage and piston movement under safely controlled pressure
Check Cushion function and consistency throughout the stroke
Summarize inspection results, replaced parts and usage recommendations within the scope of work
06 | Pneumatic System Preventive Maintenance
Check fittings, air lines, valves, and filter and pressure-regulating equipment
Check for leak points and abnormalities that could lead to machine stoppage
Advise on inspection intervals and preventive maintenance
Example from Actual Job Photos
UNIVER Pneumatic Cylinder | Model: K200-080-01000-M+CA+CB+Y | Bore: 80 mm | Stroke: 1,000 mm | Pressure range per nameplate: 1–10 bar
The photos of the disassembled unit show deposits and signs of corrosion on the end covers and parts of the surface, so the cylinder surface, piston rod and seals should be measured before the repair list is finalized.
Why Choose This Service
Service runs from problem diagnosis through testing and handover
Repair approach is assessed on actual condition, with no unnecessary parts replacement
Cylinder repair is connected with machine maintenance and Automation system work
Scope of work and quotation are provided for review before work begins
Related Services
Pneumatic System Maintenance • Air Leakage Inspection • Solenoid Valve & Pneumatic Components • Machine PM • Machine Modification & Retrofit • PLC & Automation Control • Machine Installation & Troubleshooting
How to Request Service
Report the fault and send photos / the equipment model code
We review the information and make a preliminary assessment
Schedule an on-site inspection or receive the unit, as appropriate
We propose the scope of work and price
Repair and testing
Handover with recommendations
Main service area: Rayong and nearby industrial areas (please ask about other areas)
