Arm rotation toothed rack suitable for JCB 3CX 4CX
GX-AFTER

Arm rotation toothed rack suitable for JCB 3CX 4CX

Catalog number:SKX864659A Nr OEM:121/38104 Manufacturer:GX-AFTER
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SLEW RACK (OLD TYPE) SUITABLE FOR JCB - 121/38104

Specification & Compatibility

Product: Kingpost Slew Rack
Producer: GX-AFTER
Material: High-grade heat-treated steel
Application (Machines before 1997 with rack type slew):
JCB Backhoe Loaders

3CX, 4CX

Part Number: 121/38104
Part Type: High-quality replacement

Essential for Installation

Slew Pinion Gear (absolutely recommended to replace as a set)
Kingpost Slew Wear Pads (crucial for eliminating play)
HYPTRON High-Pressure Grease

What does this part do and what are the symptoms of wear?

The slew rack is a key component of the slew mechanism in older backhoe loaders. The pinion gear travels along its teeth, causing the backhoe arm to slew. If you hear loud "cracking" or metallic grinding during slewing, the slew is jerky, imprecise, or gets stuck at a certain point, these are classic symptoms of a worn or broken tooth. Ignoring the problem leads to the destruction of the pinion gear and a complete loss of the slew function.

Parameters That Guarantee Reliability

💪

High Material Strength

Resistant to extreme loads

⚙️

Precise Gearing

Quiet operation and long life

🎯

Perfect Fit

Guaranteed hassle-free installation

Why Choose a GX-AFTER Slew Rack?

✔Precise Manufacturing

The accuracy and quality of materials guarantee long and trouble-free use without the need for frequent replacement.

✔Compatibility with Original Parts

The rack is fully adapted to work with the original pinion gear and kingpost housing, ensuring a consistent repair.

✔Savings Without Compromise

The GX-AFTER brand is a proven and safe alternative that offers quality comparable to original parts at a much better price.

Important Fitting / Service Tips

1.Always Replace in a Pair with the Pinion Gear

The slew rack and pinion gear wear out evenly. Installing a new rack with an old, worn pinion will lead to its immediate destruction. These components are always replaced as a set.

2.Check and Replace Kingpost Wear Pads

An overhaul of the slew mechanism is the perfect time to replace the wear pads. This will ensure that all play is eliminated and the entire mechanism operates smoothly.

3.Ensure Proper Lubrication

After installation, generously grease the teeth of the rack and pinion. Use high-quality grease, such as HYPTRON, and regularly check the lubrication status.

Frequently Asked Questions (FAQ)

Question: My slew is "cracking" and jamming. Is the rack at fault?

Answer: Yes, this is very likely. Loud noises and jamming most often indicate broken teeth on the rack or its mating pinion gear.

Question: Can I replace just the rack without the pinion gear?

Answer: It is highly not recommended. These two components work together and mesh during operation. Installing a new rack on an old pinion will cause a mismatch and very rapid destruction of the new part.

Question: What is the main cause of slew mechanism failure?

Answer: The most common causes are a lack of regular lubrication, which leads to seizure and breaking of teeth, and operating with excessive play caused by worn kingpost wear pads.

Question mark

If you are unsure whether the selected product is suitable for your machine, contact us and we will help you choose the right part and provide practical advice in minutes.

SKX864659A
121/38104
18.55 kg

Data sheet

SUITABLE FOR
JCB
MACHINE TYPE
BACKHOE LOADER
OEM NUMBERS
121/38104

Specific References

MPN
121/38104
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Arm rotation toothed rack suitable for JCB 3CX 4CX

Catalog number: SKX864659A
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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

1,007.37 zł

net price
819,00 zł
Available in large quantity Temporarily unavailable
819,00 zł
net price

1,007.37 zł

gross price
Nie możesz dodać więcej produktów
  • You will receive 82 points, it gives you 32.80 zł
  • Lowest price from 30 days before the discount: 1,007.37 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    JCB
    MACHINE TYPE
    BACKHOE LOADER
    OEM NUMBERS
    121/38104

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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

    Opening hours
    Telephone support - Monday - Friday (8:00 AM – 5:00 PM)
    Order pick-up - Monday - Friday (8:00 AM – 4:30 PM)

    Email



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    Phone
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