Lull 644 Maintenance Manual

Lull 644 Forklift manual cover
Pages 368
Year 1989
Language(s)
English en

Lull 644 Forklift Specification

The Lull 644 Forklift is a versatile and robust telehandler designed for demanding construction and industrial applications. It features a maximum lift capacity of 6,000 lbs, making it suitable for handling heavy materials with ease. The machine is powered by a high-performance diesel engine, providing ample power and efficiency for tough tasks. It boasts a maximum lift height of 42 feet, allowing operators to reach significant heights safely and effectively. The forward reach extends up to 30 feet, offering exceptional flexibility in material placement and retrieval.

The Lull 644 is equipped with a three-section boom that enhances its reach and maneuverability. Its hydrostatic transmission ensures smooth and precise control, while the all-wheel drive system provides superior traction and stability on various terrains. The operator cab is designed for comfort and functionality, featuring ergonomic controls, excellent visibility, and advanced safety features. The machine also includes an integrated load management system that helps prevent overloading and ensures safe operation.

Maintenance and serviceability are streamlined with easy access to key components, reducing downtime and enhancing productivity. The forklift's rugged construction and durable components are engineered to withstand the rigors of daily use in challenging environments. Additionally, the Lull 644 Forklift complies with stringent emission standards, making it an environmentally responsible choice for any job site. This telehandler is an ideal solution for contractors and operators seeking a reliable, high-performance machine that delivers exceptional lifting capabilities and operational efficiency.

Lull 644 Forklift F.A.Q.

What is the correct procedure for checking hydraulic fluid levels on a Lull 644 Forklift?

To check the hydraulic fluid levels, park the forklift on a level surface, lower the forks, and turn off the engine. Locate the hydraulic reservoir, usually found under the hood or behind a panel. Remove the dipstick, wipe it clean, reinsert, and pull it out again to check the fluid level. Ensure the level is within the recommended range indicated on the dipstick.

How can I troubleshoot steering issues on a Lull 644 Forklift?

If experiencing steering issues, first check the hydraulic fluid levels and refill if necessary. Inspect the steering linkage for any damage or wear. Examine the tires for proper inflation and wear. If the problem persists, it might be due to a faulty hydraulic pump or steering valve, which will require professional inspection and repair.

What is the recommended maintenance schedule for a Lull 644 Forklift?

The recommended maintenance schedule includes daily checks of fluid levels and tire condition, weekly inspections of hoses and connections, monthly lubrication of moving parts, and quarterly servicing of the engine, transmission, and hydraulic systems. Always refer to the operator's manual for detailed maintenance intervals.

How do I replace a damaged tire on a Lull 644 Forklift?

To replace a damaged tire, first secure the forklift on a flat surface and use wheel chocks to prevent movement. Loosen the lug nuts slightly before jacking up the forklift. Once elevated, remove the lug nuts completely and replace the damaged tire with a new one. Tighten the lug nuts in a crisscross pattern to ensure even pressure and lower the forklift back to the ground.

Why is my Lull 644 Forklift engine overheating, and how can I fix it?

An overheating engine may be caused by low coolant levels, a faulty thermostat, or a blocked radiator. Check the coolant level and refill if necessary. Inspect the radiator for debris and clean it using compressed air or water. If the problem persists, the thermostat may need replacement or there could be an issue with the water pump.

What safety checks should be performed before operating a Lull 644 Forklift?

Before operation, perform a visual inspection of the forklift for any visible damage. Check fluid levels, tire condition, and ensure all controls are functioning properly. Test the brakes, horn, and lights. Verify that the load capacity is not exceeded and that all safety equipment is in place.

How do I properly shut down a Lull 644 Forklift after use?

To shut down the forklift, first lower the forks to the ground. Shift the transmission to neutral, engage the parking brake, and let the engine idle for a minute to cool down. Turn off the engine and remove the key. Perform a post-operation inspection to ensure the forklift is in good condition for the next use.

What are common causes of transmission problems in a Lull 644 Forklift?

Common transmission problems can be caused by low transmission fluid levels, worn-out gears, or a malfunctioning torque converter. Regularly check and maintain the transmission fluid level. If issues persist, inspect the transmission for wear and damage, and consult a professional mechanic for repairs.

How can I improve the longevity of a Lull 644 Forklift?

To improve longevity, adhere to the recommended maintenance schedule, ensure proper training for operators, use the forklift within its capacity limits, and store it in a sheltered environment to protect it from weather elements. Regularly inspect and replace worn parts to prevent major failures.

How do I calibrate the lift and tilt functions on a Lull 644 Forklift?

Calibration of lift and tilt functions should be performed by a qualified technician. It involves adjusting the hydraulic valves and linkages to ensure accurate and smooth operation. Refer to the service manual for specific calibration procedures and settings, or contact the manufacturer for assistance.