FEIERDUN 4-in-1 Adjustable Leg Extension Curl Machine User Manual
Model: 4-in-1 Adjustable Leg Extension Curl Masine
1. Ynlieding
This manual provides detailed instructions for the assembly, operation, and maintenance of your FEIERDUN 4-in-1 Adjustable Leg Extension Curl Machine. This equipment is designed to facilitate various lower body workouts, including leg extensions, leg curls, hip thrusts, and calf raises, with a robust capacity of up to 700 lbs. Please read this manual thoroughly before use to ensure safe and effective training.
2. Safety Information
- Rieplachtsje in dokter foardat jo begjinne mei in nij oefenprogramma.
- Soargje derfoar dat alle bouten en moeren goed oandraaid binne foar elk gebrûk.
- Net boppe de maksimale gewicht kapasiteit fan 700 lbs.
- Hâld bern en húsdieren fuort fan 'e apparatuer tidens operaasje.
- Use the machine on a stable, level surface.
- Draach passende sportskuon en klean.
- Stopje fuortendaliks mei oefenjen as jo pine, duizeligheid of ûngemak fiele.
- Perform a warm-up before and a cool-down after each workout session.
3. Package Ynhâld
Kontrolearje oft alle ûnderdielen oanwêzich binne foardat jo begjinne mei de gearstalling:
- Beenútwreiding en Curl Masine frame
- Instruction Manual
- Alle nedige hardware foar montage
- 160 lbs Weight Plate Set (2 x 10 lbs, 2 x 25 lbs, 2 x 45 lbs) - Note: Weight plates and machine may arrive in separate packages.
4. Assembly Ynstruksjes
The FEIERDUN Leg Extension Curl Machine is designed for straightforward assembly. Clear instructions and an assembly video are provided to assist you. Assembly typically takes less than 40 minutes.
Montage stappen:
- Pak alle ûnderdielen út en ferifiearje se oan de hân fan de list mei de ynhâld fan it pakket.
- Follow the step-by-step diagrams and instructions provided in the included manual.
- Utilize the provided tools for tightening all bolts and nuts securely.
- Ensure all adjustable parts move freely and lock into position correctly after assembly.
Assembly fideo:
Foar in fisuele hantlieding, ferwize asjebleaft nei de offisjele ynstallaasjefideo:
This video provides a detailed, step-by-step guide for assembling your FEIERDUN Leg Extension Curl Masine.
Visual Aid for Assembly:

This image illustrates the simplified installation process, highlighting the key stages fan gearkomste.
5. Features
- Alsidige 4-in-1 ûntwerp: Seamlessly switch between leg extension, leg curl, hip thrust, and calf raise exercises.
- Robuste konstruksje: Made from commercial-grade alloy steel, capable of bearing up to 700 lbs for high-intensity training. Features non-slip pads for enhanced stability.
- Komfortabele padding: Ergonomically curved seat cushion and thick foam rolls provide maximum comfort and support, fitting natural leg movements.
- Uitstekende oanpassingsfermogen: Multiple adjustment points for seat (3 positions), backrest (8 positions), leg hold-on (8 positions), and leg pad (21 positions) to accommodate various user heights and training needs.
- Weight Plate Compatibility: Equipped with an Olympic adapter to fit both 1-inch and 2-inch weight plates. High-quality spring clips secure plates during workouts.
- Romtebesparend ûntwerp: Compact dimensions (33 x 34 x 38.5 inches) make it suitable for home gyms. Includes a plate storage bar for organization and added stability.
Funksjehichtepunten:

This image demonstrates the machine's versatility, allowing for multiple lower body exercises.

Detail of the leg holder, illustrating its quick adjustment for different exercises without disassembly.

This image emphasizes the machine's heavy-duty construction and high weight capacity for stable workouts.

This image showcases the comfortable, skin-friendly, breathable, and sweat-proof padding, along with the silent and durable transport wheels.
6. Operaasje en gebrûk
The FEIERDUN 4-in-1 machine allows for a variety of lower body exercises. Always ensure the machine is properly adjusted for your body and the specific exercise before starting.
Algemiene operaasje:
- Select the desired exercise (leg extension, leg curl, hip thrust, or calf raise).
- Adjust the seat, backrest, leg hold-on, and leg pad positions to fit your body comfortably and ensure proper form. (Refer to Section 7: Adjustments).
- Load appropriate weight plates onto the weight post, securing them with the spring clips.
- Perform the exercise with controlled movements, focusing on muscle contraction and full range of motion.
- Do not use momentum to lift weights; maintain strict form.
Oefening Examples:
This video demonstrates various exercises that can be performed with the adjustable leg extension curl machine to strengthen the lower body.
A short demonstration highlighting the compact design and versatility of the 4-in-1 leg extension and curl machine for home gyms.
7. Oanpassingen
The machine offers extensive adjustability to ensure a proper fit and optimal exercise mechanics for users of varying heights and preferences.
Adjustment Points:
- Sit: 3-position adjustment to modify the distance from the backrest.
- Backrest: 8-position adjustment for angle and support.
- Leg Hold-on: 8-position adjustment to secure your thighs during leg extensions and curls.
- Leg Pad: 21-position adjustment for the roller pad, ensuring it rests comfortably on your shins or behind your ankles.
- 360° Auto Adjustment: The main pivot point allows for smooth transitions between leg extension and leg curl bewegings.

This diagram highlights the various adjustment points for customizing the machine to your body and exercise needs.
8. Underhâld
Regular maintenance will prolong the life of your FEIERDUN Leg Extension Curl Machine and ensure safe operation.
- Reiniging: Veeg del de masine mei adamp in doek nei elk gebrûk om swit en stof te ferwiderjen. Foarkom skuurmiddels.
- Ynspeksje: Kontrolearje periodyk alle bouten, moeren en bewegende ûnderdielen op strakheid en slijtage. Draai alle losse befestigingen oan.
- Lubrication: Apply a small amount of silicone-based lubricant to pivot points and moving parts as needed to ensure smooth operation.
- Opslach: Bewarje de masine yn in droege, skjinne omjouwing, fuort fan direkt sinneljocht en ekstreme temperatueren.
9. Probleemoplossing
If you encounter any issues with your machine, refer to the following common troubleshooting tips:
- Piepende lûden: Check for loose bolts and lubricate moving parts.
- Unstabile operaasje: Ensure the machine is on a level surface and all feet are making firm contact. Verify all assembly bolts are tightened.
- Moeilijkheid oanpasse: Check for any obstructions or debris in the adjustment mechanisms. Apply lubricant if movement is stiff.
- Untbrekkende dielen: As der by levering ûnderdielen ûntbrekke, nim dan direkt kontakt op mei de klanttsjinst.
10. Spesifikaasjes
| Attribute | Spesifikaasje |
|---|---|
| Merk | FEIERDUN |
| Model Namme | 4-in-1 Adjustable Leg Extension Curl Masine |
| Materiaal | Alloy Staal |
| Maximum Tension Level | 700 lbs |
| Oantal items | 1 (machine) |
| Ofmjittings (L x B x H) | 33 x 34 x 38.5 inch (sawat) |
| Ynbegrepen komponinten | Instruction, Hardwares, Leg Extension and Curl Masine |

This image illustrates the compact design, making it suitable for various home gym spaces.
11. Garânsje en stipe
Your FEIERDUN 4-in-1 Adjustable Leg Extension Curl Machine komt mei in 1-jierrige garânsje.
For any product damage, missing parts, or other issues, please contact FEIERDUN customer support. We aim to respond within 12-24 hours to assist you.
For further assistance, please visit the official FEIERDUN store: FEIERDUN Winkel op Amazon