• Chain tensioner suitable for JCB JS110-130 - JNA0224
  • Chain tensioner suitable for JCB JS110-130 - JNA0224
Chain tensioner suitable for JCB JS110-130 - JNA0224
NEXGEN

Chain tensioner suitable for JCB JS110-130

Catalog number:JNA0224B Nr OEM:JNA0224 Manufacturer:NEXGEN
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Track Chain Tensioner suitable for JCB, Case & Sumitomo - JNA0224

Technical Specification and Compatibility

An essential component of the track undercarriage, the JNA0224 chain tensioner assembly by NEXGEN. Designed for 11-15 ton class excavators, including popular JCB models (JS110, JS120, JS130, JS145), Case (CX130), and Sumitomo (SH120-5). This key assembly is responsible for maintaining the correct track chain tension. It consists of a durable cylinder, a heavy-duty spring, and a piston with a grease fitting, which together absorb shocks and prevent the track from derailing or wearing excessively.

Part Number: JNA0224
Type: Track Chain Tensioner (Track Adjuster)

In the construction industry, machine reliability is the key to success. That's why we offer high-quality NEXGEN replacement parts for construction machinery, which meet the highest standards of durability and performance. Our products are the ideal solution for companies and specialists looking for reliable components at attractive prices.

Features of the NEXGEN Track Tensioner

Maintains Tension: Ensures constant, correct track chain tension, reducing wear on rollers and sprockets.
Shock Absorption: A heavy-duty internal spring effectively absorbs strong impacts, protecting the undercarriage from damage.
High Sealing: Precision cylinder seals protect the mechanism from dirt, water, and dust, preventing corrosion and seizure.
Durable Construction: Made from high-grade steel resistant to cracking and extreme field conditions.

Application in machinery

Brand Type / Series / Model
JCB JS Excavators: JS110, JS120, JS120L, JS130, JS130 AUTO, JS140, JS140 UPGRADE, JS145, JS145 AUTO, JZ140
Case CX130, JS130, JS140
Sumitomo SH120-5

The list above is for reference only. If you are unsure about the part's compatibility, please contact our experts.

Related Parts and Hardware

For a complete undercarriage overhaul, we recommend inspecting the condition of the idlers, which work directly with the tensioner, as well as the track chains, track rollers, and sprockets.

⚠️ Safety Warning

Operating with a faulty tensioner (e.g., seized or leaking) is extremely dangerous. It can lead to the track derailing during operation or travel, which risks machine rollover. A chain that is too tight will destroy the chain and sprocket, while a chain that is too loose will destroy the rollers and idler.

Part Role in the Machine and Failure Diagnostics

The track tensioner is a hydraulic cylinder combined with a heavy-duty spring, mounted in the track frame (between the frame and the idler). Its job is to push the idler wheel forward to keep the track chain under constant, correct tension. This mechanism is tensioned with grease (via a grease fitting) and compensates for undercarriage wear while absorbing harsh impacts.

[Image of track undercarriage tensioner diagram]
  • › A visibly loose, sagging track chain.
  • › The track derails (falls off) when turning or on uneven terrain.
  • › No response when trying to tension with grease (grease leaks out the side).
  • › Characteristic loud, metallic banging or "popping" from the track.
  • › Seized idler wheel or uneven wear on the idler.

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🔧 Expert Guide: Key Installation Tips

  1. Safety First: The tensioner spring is under immense tension. Disassembly and assembly must be performed with extreme caution, following the service manual.
  2. Correct Positioning: Ensure the tensioner is seated correctly in the track frame and the idler yoke.
  3. Tension Adjustment: After installation, tension the track with grease (via the grease fitting) until the chain has the required sag (check the machine manual, usually a few cm in the middle).
  4. Do Not Overtighten: Never tension the chain "bar-tight". Excessive tension drastically accelerates wear on the entire undercarriage (chain, rollers, wheels).
  5. Check After Work: After driving a few meters, re-check the tension and look for any grease leaks around the tensioner cylinder.

Frequently Asked Questions (FAQ)

Does this tensioner fit a JCB JS200 excavator?

No. This tensioner (JNA0224) is for 11-15 ton class machines (like JS130, JS145, CX130). A JS200 is a 20-ton machine and requires a much larger, stronger tensioner.

How does a track tensioner work?

It is a hydraulic cylinder filled with grease (via a grease fitting) that pushes a piston. The piston presses against the idler yoke, pushing the idler wheel out and tensioning the chain. A large spring inside the cylinder also acts as a shock absorber, absorbing impacts and maintaining tension.

How often should I check the track tension?

The correct tension (sag) should be checked daily before starting work. It should be adjusted based on conditions: the chain should be looser for work in mud, snow, or soft ground, and slightly tighter for work on hard, flat ground.

Question mark

Do you have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you select the right part to get your equipment back to work as quickly as possible.

JNA0224B
JNA0224
79.00 kg

Data sheet

SUITABLE FOR
JCB
MACHINE TYPE
EXCAVATOR
OEM NUMBERS
JNA0224

Specific References

MPN
JNA0224
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Chain tensioner suitable for JCB JS110-130

Catalog number: JNA0224B
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Manufacturer

  • Serwis Kop Sp. z o.o. Sp. K.
  • Podkarpacka 57a
  • 35-082 Rzeszów
  • Poland
  • [email protected]
  • +48178643100

Responsible person

  • Serwis Kop Sp. z o.o. Sp. K.
  • Podkarpacka 57A
  • 35-082 Rzeszów
  • Poland
  • [email protected]
  • +48178643100
gross price

2,335.77 zł

net price
1899,00 zł
Available in large quantity Temporarily unavailable
1899,00 zł
net price

2,335.77 zł

gross price
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  • You will receive 190 points, it gives you 76.00 zł
  • Lowest price from 30 days before the discount: 2,335.77 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    JCB
    MACHINE TYPE
    EXCAVATOR
    OEM NUMBERS
    JNA0224

    WE OFFER PRODUCTS OF THE BEST BRANDS

    SERWIS KOP Sp. z o.o. Sp.k.
    ul. Podkarpacka 57A, 35-082 Rzeszów
    NIP: 813-352-97-49 REGON: 180286726

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