Belt tensioner suitable for the JCB engine
GX-OEM

Belt tensioner suitable for the JCB engine

Catalog number:SKX989601C9 Nr OEM:320/08657 Manufacturer:GX-OEM
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BELT TENSIONER (DIESELMAX) SUITABLE FOR JCB 3CX, 4CX - 320/08657

Technical Specification and Compatibility

An essential component of the engine's accessory drive system – an automatic multi-ribbed belt tensioner, designed for JCB DieselMax, EcoMax. It is a key component responsible for maintaining constant, correct tension on the belt that drives the alternator, water pump, and other components. A precision spring and a high-quality bearing in the idler pulley ensure maintenance-free operation, eliminating belt slippage and protecting the bearings of driven devices from premature wear.

Part number: 320/08657
Alternative part numbers: 320/08584, 320/08759, 320/08651, 320/A8586, 320/08652, 320/A8538
Manufacturer: GX-OEM
Compatible engines: JCB DieselMax, EcoMax

By choosing GX-OEM parts, you are choosing the uncompromising quality of the original assembly. Our products are made with the highest precision, guaranteeing a perfect fit and parameters identical to the original. This is the best investment in the long and trouble-free operation of your machine.

Related Parts

  • › Multi-ribbed belt: Always replace the tensioner together with a new belt to ensure optimal system performance.

Application in machines

Brand Type / Series / Model
JCB Backhoe Loaders: 3CX, 4CX, 5CX, 214, 215, 217
Telehandlers: 520, 525, 530, 531, 533, 535, 540, 541, 550, 560
Wheel Loaders, Rough Terrain Forklifts (RTFL), Skid Steer Loaders (ROBOT), JS Excavators, Vibromax Rollers, Generators

The list above is for reference. Before purchasing, we recommend verifying the part number in the parts catalogue for your machine.

Part's Role in the Machine and Failure Diagnostics

An automatic tensioner is a key component that ensures the maintenance-free operation of the accessory belt. Its failure leads to belt slippage (problems with charging, cooling), noise, and in extreme cases, to the belt breaking and immobilizing the machine.

  • › Squealing or chirping noise from the belt area, especially on a cold engine.
  • › Visible "jumping" or excessive vibration of the tensioner while the engine is running.
  • › Noise (rumbling, grinding) from the tensioner pulley bearing.
  • › Uneven wear or frayed edges on a new belt.

Peace of Mind Guarantee: Why Choose Our Offer?

A broken belt always means unplanned and costly downtime.

A worn tensioner is the most common cause of premature belt wear or breakage. The cost of replacing a tensioner is negligible compared to the losses caused by a machine being immobilized in the middle of a workday. Don't take risks – order a new, OEM-quality tensioner with a new belt and enjoy the smooth operation of your engine.

📞 Can't find the part you're looking for?

No problem. Our website shows only a few thousand of the over 60,000 parts we have in stock. Contact us – we probably have what you need on the shelf!

🔧 Expert's Guide: Key Installation Tips

  1. Replace as a set: Always replace the tensioner together with the multi-ribbed belt. Installing a new tensioner on an old, stretched belt is pointless.
  2. Check other pulleys: While you're at it, spin all other idler pulleys and accessory pulleys by hand to check the condition of their bearings.
  3. Use the correct tool: Use a wrench or a socket of the appropriate size to release the tensioner spring to safely install the new belt.
  4. Check belt routing: Before starting the engine, make sure the belt is correctly seated in all the grooves on every pulley.

Frequently Asked Questions (FAQ)

1. How to check if the tensioner is worn out?

With the engine off, use a wrench to move the tensioner arm through its full range of motion. The movement should be smooth, without any sticking. When released, the arm should immediately and forcefully return to its rest position. Any resistance, sticking, or weak spring force qualifies it for replacement. Also, check the pulley bearing by spinning it by hand – there should be no noise or play.

2. The belt squeals only for a moment after starting a cold engine. Is it the tensioner's fault?

Very often, yes. Squealing on a cold start is a typical symptom of a worn (stretched) belt or a weakened tensioner spring that is unable to provide adequate tension when the belt is cold and stiff. The slipping stops when the belt warms up and becomes more flexible, but the problem will worsen over time.

3. Can I replace just the pulley instead of the whole tensioner?

It is possible, but often not cost-effective. The main wearing component in a tensioner is not only the pulley bearing but, more importantly, the internal spring, which loses its force over time. Replacing only the pulley is a temporary fix that does not solve the problem of low belt tension.

Key Advantages

🛡️

Accessory Protection

Protects alternator and water pump bearings.

🎯

Correct Tension

Eliminates belt squeal and slippage.

📦

OEM Quality

Guarantees a perfect fit and performance.

Question mark

Have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you choose the right part to get your equipment back to work as soon as possible.

SKX989601C9
320/08657
1.14 kg

Data sheet

SUITABLE FOR
JCB
MACHINE TYPE
BACKHOE LOADER
EXCAVATOR
GENERATOR
ROBOT
TELESCOPIC HANDLER
WHEELED LOADER
OEM NUMBERS
320/08657 / 320/08584 / 320/08759 / 320/08651 / 320/A8586 / 320/08652 / 320/A8538
ENGINE
JCB DIESELMAX
JCB ECOMAX

Specific References

MPN
320/08657
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Belt tensioner suitable for the JCB engine

Catalog number: SKX989601C9
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gross price

236.78 zł

net price
192,50 zł
Available in large quantity Temporarily unavailable
192,50 zł
net price

236.78 zł

gross price
Nie możesz dodać więcej produktów
  • You will receive 19 points, it gives you 7.60 zł
  • Lowest price from 30 days before the discount: 236.78 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    JCB
    MACHINE TYPE
    BACKHOE LOADER
    EXCAVATOR
    GENERATOR
    ROBOT
    TELESCOPIC HANDLER
    WHEELED LOADER
    Show more
    OEM NUMBERS
    320/08657 / 320/08584 / 320/08759 / 320/08651 / 320/A8586 / 320/08652 / 320/A8538
    ENGINE
    JCB DIESELMAX
    JCB ECOMAX

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