Pulley lower idler suitable for JCB 3CX 4CX
GX-AFTER

Pulley lower idler suitable for JCB 3CX 4CX

Catalog number:SKX998120A Nr OEM:320/08624 Manufacturer:GX-AFTER
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Lower Belt Idler Pulley (120mm) suitable for JCB DieselMax - 320/08624

Technical Specification and Compatibility

A high-quality complete lower idler pulley 320/08624 for the multi-ribbed belt, by GX-AFTER. This is a key engine accessory component, fitted to JCB machines (e.g., 3CX, 4CX) manufactured after 2005 and equipped with a JCB DieselMax or JCB EcoMax engine. The 120mm diameter pulley comes pre-assembled with a bearing, ready for installation.

Part Number: 320/08624
Type: Idler / Tensioner Pulley (Lower, complete)
Diameter (FI): 120 mm
Engine Compatibility: JCB DieselMax / JCB EcoMax (post 2005)

GX-AFTER is the smart choice for your machine. We provide high-class replacements that combine excellent quality with an attractive price. Each part is carefully verified to ensure full compatibility and reliability you can depend on.

Features of the 320/08624 Pulley

Precision Bearing: Equipped with a high-quality, factory-lubricated ball bearing, resistant to high speeds and temperatures.
Durable Pulley: Made from a durable composite, perfectly grooved for multi-ribbed belts to prevent fraying.
Key for Tension: As an idler pulley, it is essential for maintaining the correct tension and geometry of the multi-ribbed belt.
Complete and Ready: Supplied as a complete, assembled unit (pulley + bearing), ready to be bolted on.

Application in machinery

Brand Type / Series / Model
JCB Backhoe Loaders: 2CX, 2DX, 3CX, 4CX, 5CX, MIDI CX (with DieselMax/EcoMax engines, post-2005)
JCB Telehandlers (Loadall): Wide range (with DieselMax/EcoMax engines)
JCB Wheel Loaders: Wide range (with DieselMax/EcoMax engines)
JCB JS Excavators (Tracked & Wheeled): (with DieselMax/EcoMax engines)
JCB Skid Steer Loaders (Robot): (with DieselMax/EcoMax engines)
JCB Rough Terrain Forklifts (RTFL): (with DieselMax/EcoMax engines)
JCB Other: Vibromax, Generators, FASTRAC, TELETRUK (with DieselMax/EcoMax engines)
JCB Engines: 320/40001 to 320/49999 (DieselMax), 320/50001 to 320/55000 (EcoMax)

The list above is for reference. This pulley fits most JCB machines produced after 2005 with a JCB DieselMax or EcoMax engine.

Related Parts and Hardware

The 320/08624 pulley is a key part of the belt system. When replacing it, we also recommend replacing the multi-ribbed belt (e.g., 320/08598 or 320/08608), the upper idler pulley, and the complete belt tensioner.

⚠️ Safety Warning

A failed idler pulley bearing will seize and generate extreme heat. This can melt the pulley and cause the drive belt to snap. A snapped belt means an immediate loss of charging (alternator failure) and loss of cooling (water pump failure), which will lead to engine overheating and seizure within minutes.

Part Role in the Machine and Failure Diagnostics

The 320/08624 lower idler pulley is fixed to the engine block. Its job is to guide the multi-ribbed belt at the correct angle, ensuring it wraps properly around the crankshaft pulley and alternator, and maintaining correct tension in the entire accessory drive system.

  • › Loud squealing, whining, or grinding noise from the belt area (sign of a worn bearing).
  • › Visible wobble or vibration of the pulley while the engine is running.
  • › Drive belt is slipping off or running unevenly.
  • › Melted or cracked plastic pulley wheel.
  • › Significant play or resistance when spinning the pulley by hand (with the engine off).

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🔧 Expert Guide: Key Installation Tips

  1. Replace as a Set: Idler pulleys and tensioners wear out at a similar rate to the belt. Always replace the belt, pulleys, and tensioner as a complete set to avoid repeat failures.
  2. Verify Engine: Ensure your machine has a JCB DieselMax or EcoMax engine (post-2005). This pulley will not fit older Perkins engines.
  3. Check Alignment: Before fitting the new belt, check that all pulleys (crank, pump, alternator) and idlers are in a straight line.
  4. Cleanliness: Ensure no oil (e.g., from a leaking 320/03119 crank seal), grease, or coolant gets on the new pulley or belt.
  5. Torque: Tighten the pulley mounting bolt to the correct torque specification to prevent it from coming loose.

Frequently Asked Questions (FAQ)

Is this the complete belt tensioner?

No, this is the lower idler (guide) pulley, which is fixed. The tensioner (with the spring mechanism) is a separate component, although it often uses a similar-looking pulley.

My engine is squealing on startup. Is this pulley the cause?

A squeal is usually a slipping belt. A whine or grinding noise is a sign of a failed bearing in a pulley (like this one), the tensioner, the alternator, or the water pump. A failed bearing will add drag, which can also cause the belt to squeal.

Does this fit a 3CX with a Perkins engine?

No. This pulley (320/08624) is exclusively for newer machines (post-2005) with the JCB DieselMax or EcoMax engine. Older machines with Perkins engines have a completely different accessory drive system and use different pulleys.

Znak zapytania

Masz wątpliwości lub potrzebujesz potwierdzenia, aby uniknąć kosztownego przestoju? Zadzwoń do nas. Nasi eksperci pomogą dobrać właściwą część, aby Twój sprzęt jak najszybciej wrócił do pracy.

SKX998120A
320/08624
2.46 kg

Data sheet

SUITABLE FOR
JCB
MACHINE TYPE
BACKHOE LOADER
EXCAVATOR
FORKLIFT
GENERATOR
TELESCOPIC HANDLER
VIBROMAX
OEM NUMBERS
320/08624
ENGINE
JCB DIESELMAX
JCB ECOMAX

Specific References

MPN
320/08624
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Pulley lower idler suitable for JCB 3CX 4CX

Catalog number: SKX998120A
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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

233.09 zł

net price
189,50 zł
Available in large quantity Temporarily unavailable
189,50 zł
net price

233.09 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: 233.09 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    JCB
    MACHINE TYPE
    BACKHOE LOADER
    EXCAVATOR
    FORKLIFT
    GENERATOR
    TELESCOPIC HANDLER
    VIBROMAX
    Show more
    OEM NUMBERS
    320/08624
    ENGINE
    JCB DIESELMAX
    JCB ECOMAX

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    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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