1. Introduction and Overview
The RITFIT PLC01 Leg Extension and Curl Machine is designed to provide a comprehensive leg workout, targeting both quadriceps and hamstrings. This versatile equipment allows for seated leg extensions and lying leg curls, making it an ideal addition to any home gym. Constructed from heavy-gauge steel, the PLC01 offers superior durability and stability, supporting a maximum training weight of 375 lbs and a user weight of up to 325 lbs. Its ergonomic design and adjustable settings ensure comfort and proper exercise form for users of all fitness levels.

Image: The RITFIT Leg Extension and Curl Machine, showcasing its robust design and dual functionality.
2. Safety Information
Before using the RITFIT PLC01 Leg Extension and Curl Machine, please read and understand all safety instructions. Failure to do so may result in serious injury.
- Consult a Physician: Always consult with a healthcare professional before starting any new exercise program.
- Proper Assembly: Ensure all parts are correctly assembled and tightened according to the instructions. Regularly check all bolts and nuts for tightness.
- Stable Surface: Use the machine on a flat, stable, and non-slip surface.
- Clearance Area: Maintain adequate clear space around the machine during use.
- Weight Limits: Do not exceed the maximum user weight of 325 lbs or the maximum training weight of 375 lbs.
- Children and Pets: Keep children and pets away from the machine during operation.
- Proper Form: Always use proper exercise form to prevent injury. If you experience pain or discomfort, stop immediately.
- Inspect Before Use: Before each use, inspect the machine for any signs of wear, damage, or loose components. Do not use if damaged.
3. Package Contents
The RITFIT PLC01 Leg Extension and Curl Machine is shipped in one separate package. Please verify that all components are present and undamaged upon receipt.
Included Components:
- Main Frame Assembly
- Seat and Backrest Pads
- Leg Roller Pads
- Cable and Pulley System
- Weight Plate Post (compatible with 1'' and 2'' Olympic weight plates)
- Vertical Storage Device for 2-inch Olympic Weight Plates
- Assembly Hardware (bolts, nuts, washers)
- Assembly Tools
- User Manual
4. Setup Instructions
The PLC01 is designed for effortless setup with factory pre-assembled parts. Follow these steps for quick and easy installation:
- Unpack Components: Carefully remove all parts from the packaging and lay them out. Verify against the package contents list.
- Attach Base Stabilizers: Securely attach the base stabilizers to the main frame using the provided hardware. Ensure they are firmly tightened.
- Install Seat and Backrest: Mount the seat and backrest pads onto the designated frame sections. Adjust the backrest to your preferred angle using the adjustment pin. The machine features 4 adjustable backrest angles.
- Assemble Leg Roller Mechanism: Attach the leg roller arm and pads. Ensure the cable system is correctly routed through the pulleys as per the diagram.
- Attach Weight Plate Post: Secure the weight plate post to the machine. This post is compatible with both 1-inch and 2-inch Olympic weight plates.
- Install Vertical Storage Device: Attach the vertical storage rod for 2-inch Olympic Weight Plates at the rear of the machine. This provides safe and stable storage and helps maintain a balanced center of gravity.
- Final Check: Before first use, double-check all bolts, nuts, and connections to ensure they are secure.

Image: Product dimensions, illustrating the compact design and space-saving features.

Image: Key features including the vertical storage device, ergonomic handle design, and non-fixed leg stop design.
5. Operating Instructions
The RITFIT PLC01 allows for two primary leg exercises: seated leg extensions and lying leg curls. Adjustments are key to maximizing your workout and ensuring comfort.
5.1. Seated Leg Extension
- Adjust Backrest: Select one of the 4 adjustable backrest angles for optimal comfort and support.
- Load Weight Plates: Add desired weight plates to the weight post.
- Position Yourself: Sit on the machine with your back firmly against the backrest. Position your shins behind the lower leg roller pad, ensuring the pad rests slightly above your ankles.
- Adjust Range Position: The machine offers 12 adjustable range positions. Adjust the starting position of the leg roller to ensure a full range of motion without hyperextension.
- Perform Extension: Grasp the ergonomic handles for stability. Extend your legs upwards, contracting your quadriceps. Hold briefly at the top, then slowly lower the weight back to the starting position.

Image: A user demonstrating the seated leg extension exercise.

Image: Visual guide to the 4 adjustable backrest angles and 12 adjustable range positions.
5.2. Lying Leg Curl
- Adjust Backrest: For lying leg curls, the backrest should be in a flat or near-flat position.
- Load Weight Plates: Add desired weight plates to the weight post.
- Position Yourself: Lie face down on the machine, ensuring your knees are aligned with the machine's pivot point. Position the upper leg roller pad behind your ankles.
- Adjust Range Position: Adjust the starting position of the leg roller to ensure a comfortable and effective range of motion.
- Perform Curl: Grasp the ergonomic handles for stability. Curl your legs upwards, contracting your hamstrings. Hold briefly at the top, then slowly lower the weight back to the starting position.

Image: A user demonstrating the lying leg curl exercise.

Image: The machine configured for both seated leg extension and lying leg curl exercises.

Image: Examples of various exercises that can be performed using the machine's versatile design.
6. Maintenance
Regular maintenance will ensure the longevity and safe operation of your RITFIT PLC01 Leg Extension and Curl Machine.
- Cleaning: Wipe down the machine with a damp cloth after each use to remove sweat and dust. Avoid abrasive cleaners.
- Inspect Hardware: Periodically check all bolts, nuts, and screws for tightness. Re-tighten as necessary.
- Lubrication: Apply a small amount of silicone-based lubricant to moving parts, such as the pivot points and pulley axles, every few months or as needed to ensure smooth operation.
- Cable Inspection: Regularly inspect the cable for fraying, kinks, or any signs of wear. If damage is observed, discontinue use immediately and replace the cable.
- Pad Condition: Check the condition of the seat, backrest, and leg roller pads for tears or excessive wear.
- Storage: Store the machine in a dry, clean environment away from extreme temperatures and direct sunlight.
7. Troubleshooting
If you encounter any issues with your RITFIT PLC01, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine feels wobbly or unstable. | Loose bolts or uneven surface. | Ensure all assembly bolts are tightened. Move the machine to a flat, level surface. |
| Movement is not smooth or feels sticky. | Lack of lubrication on moving parts or dirty pulleys. | Apply silicone-based lubricant to pivot points and pulley axles. Clean any debris from the pulleys. |
| Noise during operation (squeaking, grinding). | Loose connections, lack of lubrication, or worn parts. | Check and tighten all bolts. Lubricate moving parts. Inspect for any worn components that may need replacement. |
| Leg roller pad feels uncomfortable or misaligned. | Incorrect adjustment of the leg stop or backrest. | Adjust the leg stop and backrest to ensure the pad is positioned correctly slightly above the ankle for leg extensions or behind the ankle for leg curls. |
If the problem persists or you encounter an issue not listed here, please contact RITFIT customer support.
8. Specifications
- Model Name: PLC01
- Brand: RitFit
- Material: Alloy Steel
- Color: Black
- Strap Type: Cable/Pulley straps
- Maximum User Weight: 325 lbs
- Maximum Training Weight: 375 lbs
- Item Package Dimensions (L x W x H): 42.52 x 25.59 x 11.02 inches
- Package Weight: 120.35 Pounds
- Adjustable Backrest Angles: 4 positions
- Adjustable Range Positions: 12 positions
- Weight Plate Compatibility: 1-inch and 2-inch Olympic Weight Plates
9. Warranty and Support
RITFIT stands behind the quality of its products. The PLC01 Leg Extension and Curl Machine comes with a 100% satisfaction guarantee.
- Warranty: Lifetime Limited Warranty.
- Return Policy: 30-day return policy.
- Customer Service: For any questions, concerns, or support needs, please contact RITFIT customer service. You can find contact information on the official RitFit website or through your purchase platform.





