Introduction
Snorkel scissor lifts are powerful tools that can be used for a wide range of tasks, including construction, maintenance, and repair. However, like any machinery, they can encounter problems from time to time. Fortunately, many common issues can be resolved quickly and easily with a little bit of troubleshooting. This guide will delve into the most common issues and provide step-by-step troubleshooting tips for keeping your Snorkel scissor lift running smoothly.
Common Snorkel Scissor Lift Problems and Solutions
1. Scissor Lift Won't Start
This is perhaps the most frustrating issue you might encounter. Here’s a breakdown of common causes and solutions:
a. Dead Battery
- Symptom: The lift simply won't turn on.
- Cause: The battery is completely discharged.
- Solution:
- Charge the battery using a suitable charger.
- If the battery is beyond repair, you will need to replace it.
b. Battery Connections
- Symptom: The lift may make some noises but not start.
- Cause: Loose or corroded connections in the battery terminals.
- Solution:
- Clean the terminals with a wire brush and a baking soda solution.
- Retighten the terminal connections.
c. Faulty Ignition Switch
- Symptom: No power to the lift.
- Cause: The ignition switch itself might be faulty or broken.
- Solution:
- Check the switch for any visible damage.
- If necessary, replace the switch with a compatible part.
d. Electrical Problems
- Symptom: No response from the lift or specific functions.
- Cause: Faulty wiring, blown fuses, or a problem with the control module.
- Solution:
- Inspect wiring for visible damage or loose connections.
- Check fuses and replace any that are blown.
- Consult a certified technician for diagnosis and repair of control module issues.
e. Low Fuel
- Symptom: The lift struggles to start or stalls.
- Cause: The lift's fuel tank is low on fuel.
- Solution:
- Refuel the lift with the appropriate type of fuel.
f. Air Filter Issues
- Symptom: The engine runs roughly or lacks power.
- Cause: A clogged air filter.
- Solution:
- Inspect the air filter for dirt and debris.
- Replace the filter if necessary.
2. Scissor Lift Won't Move
When your Snorkel scissor lift refuses to move, it’s time to investigate the hydraulic system:
a. Low Hydraulic Fluid
- Symptom: The lift is unable to raise or lower, or movement is slow and jerky.
- Cause: The hydraulic system is low on fluid.
- Solution:
- Check the hydraulic fluid level and top it off with the recommended type of fluid.
- Never overfill the reservoir, as this can damage the system.
b. Hydraulic Pump Failure
- Symptom: The lift makes strange noises or doesn't respond to controls.
- Cause: The hydraulic pump is malfunctioning or has failed completely.
- Solution:
- Inspect the pump for leaks, damaged seals, or other issues.
- Consult a qualified technician for replacement or repair of the pump.
c. Hydraulic Fluid Leak
- Symptom: Fluid dripping from the hydraulic system.
- Cause: A leak in the hydraulic lines, hoses, or seals.
- Solution:
- Locate the leak and repair or replace the damaged components.
- If you can't identify the leak, consult a technician.
d. Hydraulic Valve Issues
- Symptom: The lift responds inconsistently to controls.
- Cause: A problem with the hydraulic control valves.
- Solution:
- Check for obstructions or damage in the valves.
- Consult a technician for diagnosis and repair.
3. Scissor Lift Raises Slowly or Not At All
Here's a breakdown of the most common causes and solutions for a sluggish lift:
a. Hydraulic System Overheating
- Symptom: The lift operates slowly, and you may notice a burning smell.
- Cause: The hydraulic fluid has become overheated, usually due to prolonged operation or a malfunctioning fan.
- Solution:
- Allow the hydraulic system to cool down completely.
- Check the cooling fan for proper operation.
- Consider using a higher-quality hydraulic fluid with better heat dissipation properties.
b. Hydraulic Cylinder Issues
- Symptom: The lift raises partially or not at all, or the platform is tilted.
- Cause: The hydraulic cylinder may have internal damage or a leak.
- Solution:
- Inspect the cylinder for any visible leaks or damage.
- Consult a technician for diagnosis and repair or replacement.
c. Hydraulic Valve Issues
- Symptom: The lift may raise intermittently or have issues with platform stability.
- Cause: A problem with the hydraulic control valves.
- Solution:
- Check for obstructions or damage in the valves.
- Consult a technician for diagnosis and repair.
4. Scissor Lift Makes Unusual Noises
Unusual noises from your lift usually indicate problems with the hydraulic system or the engine:
a. Hydraulic Pump Noise
- Symptom: Loud whining, grinding, or screeching sounds.
- Cause: A failing hydraulic pump.
- Solution:
- Inspect the pump for any visible damage.
- Consult a qualified technician for replacement or repair.
b. Hydraulic Fluid Leaks
- Symptom: Hissing or dripping sounds.
- Cause: Leaks in the hydraulic lines, hoses, or seals.
- Solution:
- Locate the leak and repair or replace the damaged components.
- If you can't identify the leak, consult a technician.
c. Engine Noise
- Symptom: Knocking, rattling, or grinding sounds.
- Cause: Engine problems, such as worn bearings, a failing fuel pump, or a damaged piston.
- Solution:
- Consult a qualified technician to diagnose and repair the engine issue.
5. Scissor Lift Won't Lower
This is a serious issue, and it's important to address it immediately:
a. Low Hydraulic Fluid
- Symptom: The lift won't lower or lowers very slowly.
- Cause: The hydraulic fluid level is low.
- Solution:
- Check the hydraulic fluid level and top it off with the recommended type of fluid.
- Never overfill the reservoir, as this can damage the system.
b. Hydraulic Cylinder Issues
- Symptom: The lift won't lower, or it lowers unevenly.
- Cause: Internal damage or a leak in the hydraulic cylinder.
- Solution:
- Inspect the cylinder for any visible leaks or damage.
- Consult a technician for diagnosis and repair or replacement.
c. Hydraulic Valve Issues
- Symptom: The lift might lower intermittently or with unusual resistance.
- Cause: Problems with the hydraulic control valves.
- Solution:
- Check for obstructions or damage in the valves.
- Consult a technician for diagnosis and repair.
d. Emergency Lowering System
- Symptom: The lift will not lower, and the emergency lowering system is not engaging.
- Cause: The emergency lowering system might be faulty or requires attention.
- Solution:
- Check the system for any signs of damage.
- Consult a qualified technician for diagnosis and repair.
6. Scissor Lift Platform Tilts
- Symptom: The platform tilts when raised or lowered, or the lift is unstable.
- Cause: Uneven hydraulic pressure, damaged hydraulic cylinders, or a problem with the leveling system.
- Solution:
- Inspect the hydraulic cylinders for damage or leaks.
- Check the leveling system for proper operation.
- Consult a technician for diagnosis and repair.
7. Scissor Lift Brakes Don't Work
- Symptom: The lift rolls freely on an incline or does not stop when the brakes are applied.
- Cause: Faulty brakes, worn brake pads, or low brake fluid.
- Solution:
- Inspect the brakes for any visible damage or wear.
- Check the brake fluid level and top it off if necessary.
- Consult a technician for diagnosis and repair.
8. Scissor Lift Alarm System
- Symptom: The alarm system is malfunctioning, constantly sounding, or not working at all.
- Cause: Faulty sensors, loose wires, or a problem with the alarm control unit.
- Solution:
- Check the alarm system for any visible damage.
- Inspect the sensors and wiring for loose connections or problems.
- Consult a technician for diagnosis and repair.
9. Scissor Lift Control System
- Symptom: The control system is not responding correctly, or the lift is behaving erratically.
- Cause: Faulty controls, loose wiring, or a problem with the control module.
- Solution:
- Inspect the controls and wiring for any visible damage.
- Consult a technician for diagnosis and repair.
Safety Precautions
Before troubleshooting your Snorkel scissor lift, it's essential to prioritize safety:
- Never attempt to troubleshoot or repair a lift while it is powered up or in operation.
- Always disable the power source and lower the platform to the ground before beginning any work.
- If you are unsure about any aspect of troubleshooting or repair, consult a qualified technician.
- Use appropriate safety gear, such as gloves, safety glasses, and sturdy footwear.
- Keep the work area clean and free of obstructions.
Maintenance Tips
Regular maintenance is crucial for keeping your Snorkel scissor lift in optimal condition:
- Check fluid levels regularly: This includes hydraulic fluid, engine oil, and coolant.
- Inspect tires and brakes: Ensure they are in good condition and have adequate tread depth.
- Clean and lubricate moving parts: Keep all moving parts, including the hydraulic cylinders, free from dirt and debris.
- Inspect the platform and guardrails: Ensure they are free of damage and securely attached.
- Check the battery: Make sure the battery terminals are clean and securely connected.
- Perform regular engine inspections: Check the engine oil, air filter, and other components.
Common FAQs
1. What are the most common causes of a Snorkel scissor lift not working?
The most common reasons for a Snorkel scissor lift not working include a dead battery, low hydraulic fluid, faulty ignition switch, and electrical problems.
2. How do I check the hydraulic fluid level?
The hydraulic fluid level should be checked when the lift is on a level surface and the platform is lowered. There is a dipstick in the hydraulic reservoir, and the fluid level should be between the "full" and "low" markings.
3. How often should I service my Snorkel scissor lift?
It's recommended to have your Snorkel scissor lift serviced every 50 hours of operation or every six months, whichever comes first.
4. Can I use any type of hydraulic fluid in my Snorkel scissor lift?
No. You must use the type of hydraulic fluid specified in the lift's operator's manual. Using the wrong type of fluid can damage the hydraulic system.
5. What should I do if my Snorkel scissor lift starts making unusual noises?
If you hear unusual noises, such as grinding, whining, or knocking, stop using the lift immediately and contact a qualified technician for diagnosis and repair.
Conclusion
Troubleshooting a Snorkel scissor lift can be a daunting task, but with a little patience and a methodical approach, many problems can be diagnosed and resolved. By understanding the common causes of issues and following the steps outlined in this guide, you can keep your Snorkel scissor lift operating safely and efficiently. Remember, always prioritize safety by following proper procedures and seeking professional help if you encounter any issues you cannot resolve independently.