Forklift Anatomy
2 hours
Learning Objectives
- •Identify and name the major components of a counterbalanced forklift
- •Explain the function of the mast, carriage, forks, and counterweight
- •Describe how reach trucks and telehandlers differ from a standard counterbalanced forklift
- •Explain the role of overhead guard and load backrest extension in operator and load protection
Topics Covered
- •Counterbalanced forklift: forks at the front, counterweight at the rear, no outriggers
- •Mast: the vertical assembly that raises and lowers the carriage; channels, rollers, and lift chains
- •Carriage: the plate the forks attach to; moves up and down the mast
- •Forks (tines): rated as a set; heel wear and cracks are critical inspection points
- •Load backrest extension: prevents the load from shifting back toward the mast and operator
- •Counterweight: cast mass at the rear that balances the load on the forks — never alter or add to it without manufacturer approval
- •Overhead guard (FOPS) and operator restraint system / seat belt
- •Reach truck: forks extend forward on a pantograph or scissor mechanism; narrow-aisle warehouse use
- •Telehandler / variable-reach rough-terrain forklift: telescoping boom, often outriggers, used on uneven ground
Resources
Self-Check Questions
Question 1: On a counterbalanced forklift, what is the purpose of the counterweight at the rear of the truck?
- A. To add traction to the steer wheels
- B. To balance the weight of the load on the forks so the truck does not tip forward(correct)
- C. To protect the operator from falling objects
- D. To store the battery or fuel tank
Show Explanation
Explanation:
The counterweight offsets the load on the forks, keeping the combined center of gravity within the stability triangle. Exam tip: never add to or modify the counterweight without the manufacturer's written approval — it changes the truck's rated capacity and stability.
Question 2: During an inspection you find a crack at the heel of one fork (where the blade meets the upright shank). What should you do?
- A. Use the truck for light loads only
- B. Weld the crack and continue working
- C. Remove the truck from service until the forks are replaced(correct)
- D. Monitor the crack for the rest of the shift
Show Explanation
Explanation:
The heel carries the highest stress on a fork. A crack there can lead to sudden failure and a dropped load. Cracked forks must be taken out of service and replaced — field welding of forks is not acceptable.
Question 3: How does a reach truck differ from a standard counterbalanced forklift?
- A. A reach truck has no mast
- B. A reach truck's forks extend forward on a pantograph or scissor mechanism for narrow-aisle work(correct)
- C. A reach truck has a telescoping boom
- D. A reach truck cannot lift loads above shoulder height
Show Explanation
Explanation:
A reach truck uses a pantograph/scissor mechanism to extend the forks forward into a rack, allowing it to work in narrower aisles than a counterbalanced forklift. Its stability characteristics change as the forks reach out.
Question 4: What is the function of the load backrest extension on a forklift carriage?
- A. To increase the truck's rated capacity
- B. To keep the load from shifting rearward toward the mast and operator when the mast is tilted back or raised(correct)
- C. To act as a step for the operator
- D. To shield the hydraulic hoses
Show Explanation
Explanation:
The load backrest extension prevents the load — or part of it — from falling back toward the mast and operator. It is a required guard whenever the load could shift rearward.
Question 5: Which feature distinguishes a telehandler from a standard warehouse forklift?
- A. It has no overhead guard
- B. It uses a telescoping boom that extends up and out, and is built for uneven, rough-terrain ground(correct)
- C. It cannot carry palletized loads
- D. It has its counterweight at the front
Show Explanation
Explanation:
A telehandler (variable-reach rough-terrain forklift) has a telescoping boom that reaches both up and forward. Its capacity drops sharply as the boom extends, which is why it has a load chart, not a single rated capacity.
Question 6: What is the primary purpose of the overhead guard on a forklift?
- A. To keep rain off the operator
- B. To protect the operator from falling objects and small dropped loads(correct)
- C. To support the mast
- D. To house the lighting system
Show Explanation
Explanation:
The overhead guard is falling-object protection (FOPS-type). It is not designed to stop a full capacity load, but it protects the operator from smaller objects that could fall from an elevated load or from racking.