FAQs, Common Questions about Komatsu Forklift Malfunctions

FAQs, Common Questions about Komatsu Forklift Malfunctions

1. What are the common causes of reduced engine power in Komatsu forklifts?
– Air filter clogged and needs to be replaced
– Fuel injection system issues such as clogged or stuck nozzles
– Ignition system not working properly, like burnt spark plugs or faulty ignition wires
– Turbocharger with compressed air leaks
– Low engine oil level or old oil needing replacement

2. Why do rubber tire wheels on forklifts wear out faster than normal?
– Incorrect tire pressure, either too high or too low
– Overloading causing tires to wear out quickly
– Uneven tire wear due to continuous movement on rough terrain with rocks and debris
– Uneven tire wear due to sharp turns or sudden braking habits
– Tire lifespan has expired according to recommended intervals and needs replacement

3. What are common hydraulic system malfunctions in Komatsu forklifts?
– Hydraulic fluid leakage from cylinders, hoses, or damaged pipes
– Stuck or malfunctioning hydraulic control valves
– Hydraulic pump worn out, reducing operational efficiency
– Contaminated hydraulic fluid requiring replacement for quality maintenance
– Broken, deformed, or displaced hydraulic oil pipes

4. How to detect and fix hydraulic fluid leaks?
– Regularly check hydraulic fluid levels by visually inspecting the gauge
– Use a pressure gauge tool to check system pressure levels
– Spray powder to detect leaks at joints, hoses to locate leak points
– Replace damaged components like seals, cylinders, or hoses
– Clean and refill with new hydraulic fluid following correct procedures

5. When should the battery pack on a Komatsu forklift be replaced?
– When the battery has exceeded the recommended lifespan, typically 3–5 years
– Signs of battery leakage, low water level or swollen caps
– Rapid battery drain after full charge indicates a faulty battery
– Inability to start, slow engine turnover during startup
– Cracks or corrosion in the battery core indicate the need for replacement

6. Why do error lights on the control panel frequently illuminate?
– Possible electrical system issues such as faulty relays or blown fuses
– Faulty sensors measuring operational parameters
– Electronic control circuits in the central control box malfunctioning
– Weak battery or malfunctioning charging system causing lights to come on
– Software bugs requiring updates in the system

7. Causes and solutions for insufficient braking force in forklifts?
– Insufficient brake fluid levels or depletion
– Worn-out brake discs that are warped or corroded
– Brake oil lines leaking or blocked
– Pump failure or faulty brake oil injectors

– Check and refill brake fluid according to standards
– Replace worn-out brake pads if they have exceeded their limit
– Polish or replace brake discs if they are worn out
– Replace new brake oil lines if they are leaking
– Check, repair, replace pumps and brake oil injectors

8. What are common faults in reverse alarm systems on forklifts?
Reverse alarm horn is damaged and does not sound an alert
Motion detection sensors for reverse movement are faulty or broken
Electrical wires leading to reverse alarm horn are cut off
Relay controlling reverse alarm horn is short-circuited
Battery supplying power to reverse alarm system is weak or depleted

9. How to identify and address mast chain wear issues?
Signs of identification: Unusual noises from mast chains during operation; load tilting; insufficient lifting height
Visual inspection of chain joints; lifting chains; lifting ribs
Use thickness measuring devices to check component wear levels
Replace worn components such as chains; ribs; joints if they exceed permissible limits
Tighten bolts; screws on mast chains if they are loose

10. How to inspect and maintain drive systems on Komatsu forklifts?
Inspect gearbox condition thoroughly; belt drive systems; gears
Change gearbox oil regularly and lubricate moving parts smoothly
Check and adjust belt tension if it is loose
Replace necessary rubber seals on power transmission shaft
Thoroughly clean cooling systems and cooling fans for engines

11. What should be noted when encountering abnormal shaking at the mast?
Check carefully joints; bolts that may have loosened
Ensure lifting ribs; lifting chains are not excessively worn
Inspect support bearings; support balls of mast not worn out
Measure chain tension force correctly according to standards
Stop operating temporarily if shaking is too strong to avoid damage

12. Methods of preventing hydraulic cylinder rusting?
Regularly check lubricate hydraulic cylinders
Use specialized anti-rust spray applied onto cylinders
Replace hydraulic oil regularly prevent contamination
Store forklift in dry cool place when not in use
Cover tightly protective caps over cylinders when inactive

13. Why do material handling vehicles make strange noises during operation?
Worn-out gear transmission systems lack lubrication
Brake mechanisms jammed foreign objects causing friction

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