On Board Services

Full Integration:

Project team handles complete ME Docking Services including pneumatic systems, FIVA, HPS, and ECS.

Spare Parts Included:

All necessary parts supplied as part of the service.

No Hidden Costs:

Standard package pricing with no overtime or extra fees.

Warranty:

6-month warranty on all services.

Global Service Stations:

Located in Shanghai, Dalian, Zhoushan, Shenzhen, Guangzhou, and Singapore for fast, reliable support.

MC/MC-C/ME-B/ME-C/RTA/RT-Flex/UEC 2-Stroke Engines

At Junma Services, we help shipowners take control of engine health through advanced diagnostics and expert engineering support. Our Cylinder Condition Evaluation service identifies issues early — preventing costly failures, reducing downtime, and ensuring long-term efficiency.

Accurate Oil Dosage – Scrape-down analysis to ensure correct detergency levels.

Early Water Contamination Detection – Precise tests to protect against hidden risks.

Fuel Quality & Cat Fines Control – Reliable testing with advanced instruments and replica analysis.

Pressure & Load Assessment – Detect excessive Pmax–Pcom and overload conditions.

Wear Ridge & Liner Checks – Capture liner images without removing covers.

Combustion Quality Review – Diagnose injector or exhaust valve faults before they escalate.

Liner Wear & Ovality Monitoring – Predictive maintenance using LDM measurements.

Comprehensive Fuel Monitoring – Safeguard long-term combustion efficiency.

Junma delivers end-to-end solutions for shipowners who demand peace of mind, reliability, and efficiency in marine engine management.

MC/MC-C/ME-B/ME-C/RTA/RT-Flex/UEC 2-Stroke Engines

Safe. Reliable. Cost-Effective.

Your vessel depends on a reliable pneumatic system to stay safe, efficient, and on schedule. That’s why shipowners trust Junma Services—because we focus on what matters most to you: safety, uptime, and performance.

What This Means for You

🔹 Safety You Can Rely On

Only 100% genuine spare parts, installed and tested by certified experts—so you never have to worry about shortcuts.

🔹 Less Downtime, More Sailing

Fast troubleshooting and efficient planned maintenance keep your voyages on schedule.

🔹 Confidence in Every Operation

From main engine remote control to bridge systems, everything works seamlessly when it matters most.

🔹 No Unnecessary Wear

Simulation testing verifies performance without starting the engine—saving fuel and protecting equipment.

🔹 Full Control, Always

Valves, gauges, and control systems maintained in top condition for total peace of mind.

Why It Matters

✔ Peace of Mind – Your fleet runs smoothly, voyage after voyage.

✔ Better Value – Prevent failures before they happen and cut costs long-term.

👉 At Junma, our mission is simple: keep your vessel running safe, smooth, and cost-effective—so you can focus on your business, not breakdowns.

MC/MC-C/ME-B/ME-C/RTA/RT-Flex/UEC 2-Stroke Engines

At Junma Services, we specialize in keeping your cylinders protected and your operations running smoothly. With over five years of dedicated expertise in Alpha Lubricator system overhauls, our complete service package maximizes reliability, minimizes downtime, and safeguards long-term engine performance.

Precise Timing & Installation Checks – Encoders, BCU pick-ups, and index transmitters calibrated for accuracy.

Full Alarm Verification & System Adjustments – Ensuring all signals and protections function as designed.

N₂ Accumulator Service – Replacement and filling at both 1.5 bar & 30 bar.

Software Upgrades – Applied where required to maintain up-to-date performance.

Visual Cable Inspections – Detect fatigue and ensure electrical safety.

Complete Lubricator Overhaul – Full restoration of Alpha lubricator units.

Pump Station Maintenance – Filter and coupling replacement with OEM-quality parts.

Comprehensive System Testing – End-to-end verification for flawless operation.

Junma ensures your Alpha Lubricator system remains reliable, efficient, and voyage-ready — every time your ship sets sail.

MC/MC-C 2-Stroke Engines

At Junma Services, we deliver precision liner diameter measurement (LDM) services that help shipowners monitor engine health, comply with emissions regulations, and plan maintenance with confidence.

High Accuracy Reports

Detect liner wear, remaining life, ovality, and clover leafing with 0.03 mm accuracy, giving you precise data to plan proactive maintenance.

Fast & Non-Intrusive

No need to remove the cylinder head — the LDM device is inserted through the scavenging ports, allowing inspections to be completed in just 40 minutes by a single operator.

Early Detection of Abnormal Wear

Identify deformation caused by slow steaming, new lubricants, or route changes, so corrective actions can be taken before major damage occurs.

Wide Measurement Range

Suitable for cylinder liners between 500–980 mm diameters.

Save time and cost with non-invasive inspection.

Enable condition-based maintenance for better reliability.

Ensure compliance with tightening emissions control regulations.

Gain peace of mind with faster decision-making supported by accurate data.

2-Stroke 500-980 Bore Engines

At Junma Services, we provide Diesel Engine Combustion Chamber (DEC) Testing to ensure reliable engine performance, reduce downtime, and support cost-effective maintenance planning.

Comprehensive Condition Monitoring

Evaluate sealing conditions inside the cylinder to detect leaks or abnormalities early.

Reliable Engine Assessment

Assess engine condition during management takeover, ensuring transparency and informed decision-making.

Maintenance Planning Made Easy

Test results allow shipowners to plan necessary repairs or replacements before docking, minimizing unexpected costs and downtime.

Wide Application Range

Suitable for 4-stroke diesel and gas engines with bore sizes between 160 mm – 460 mm.

Supplement existing maintenance with a proven diagnostic tool.

Save time and costs by preventing unexpected failures.

Ensure safe, optimized, and reliable operation of critical engine systems.

4-Stroke 160-460 Bore Engines

At Junma Services, we provide comprehensive General Service Packages for both 4-Stroke and 2-Stroke engines, designed to keep your vessel’s engines running reliably, reduce risks of sudden failures, and ensure smooth operations across every voyage.

4-Stroke Routine Services (16K / 24K Hours)

Complete maintenance packages including unit overhauls, liner checks, bearing replacements, and fuel pump jobs.

2-Stroke PMS (Planned Maintenance System)

Scheduled inspections and servicing to keep your engine in peak condition and compliant with maintenance intervals.

Unit Overhauls

Expert overhauls on pistons, cylinder covers, and connecting rods, carried out with precision to extend engine life.

Liner Services

Liner inspection, wear detection, and replacement jobs for sustained reliability and performance.

Bearing Services

Main and crankpin bearing inspections and replacements to prevent unexpected breakdowns.

Fuel Pump & Component Jobs

Overhaul and reconditioning of fuel pumps and fuel components to guarantee safe combustion and efficiency.

Preventive Maintenance Focus

All services are designed to detect early wear, avoid sudden engine failures, and optimize operational costs.

Junma’s General Service packages give shipowners the assurance of reliable engines, fewer failures, and predictable costs — ensuring vessels remain safe, efficient, and voyage-ready.

All 2&4 Stroke Engines

At Junma Services, we understand that unexpected engine issues can cause costly delays. Our Remote Assistance Service connects you directly with professional engineers who provide real-time troubleshooting, fault diagnosis, and maintenance guidance — ensuring your vessel stays operational and competitive.

24/7 Expert Assistance

Immediate response for emergency cases, from engine not starting to complex cylinder condition assessments.

Comprehensive Troubleshooting Solutions

Whether it’s fuel injection, cylinder wear, abnormal vibrations, or performance loss, our specialists deliver proven solutions remotely — minimizing downtime and preventing costly errors.

Minimized Revenue Loss

Reduce risk of vessel off-hire and unexpected downtime with swift interventions.

Cost Efficiency

Avoid unnecessary site visits and lower operational expenditure (OPEX) with precise remote guidance.

Extended Equipment Lifespan

Proactive monitoring and countermeasures keep your equipment running longer and more reliably.

Enhanced Crew Confidence

Your crew gains reassurance knowing expert backup is just a call away, ensuring smoother operations and peace of mind.

All 2 & 4 -Stroke Engines

At Junma Services, our Riding Crew Teams are highly trained to provide on-board repair and maintenance support, ensuring minimum downtime and maximum efficiency for your vessel. Whether it’s routine overhauls, emergency support, or voyage repairs, our experts deliver reliable solutions — anytime, anywhere.

Full-Service Capability

Onboard support for 2-Stroke & 4-Stroke engines, including unit overhauls, crankshaft & camshaft renewal, liner jobs, bearing inspections, and fuel pump overhauls.

Genuine Spares Ready

Stock of OEM-approved components, including crankshafts, engine blocks, and repair kits, ensuring long-term reliability.

Skilled & Certified Teams

Teams of experienced engineers and fitters (Seaman Book certified) ready to join vessels at global anchorages.

Daily Progress Reporting

Transparent updates keep owners fully informed of job status and completion schedules.

Top OH 6DK28E: Completed within 3–4 days at Singapore anchorage (with load test).

Top OH 6L23/30H × 3 Sets: Completed within 7 days at Vietnam anchorage.

All 2 & 4 Stroke Engines