Plate brake counter suitable for CAT machines
FEROSTEM

Plate brake counter suitable for CAT machines

Catalog number:SKX831880FM Nr OEM:9R-9401 Manufacturer:FEROSTEM
Add a review

FEROSTEM BRAKE SEPARATOR PLATE (STEEL) FOR CAT 428C, 428D, 432D - 9R9401

Technical Specification and Compatibility

A key component of the wet brake pack – this is a precision-made steel brake separator plate by FEROSTEM. It is designed for the drive axles in newer generation CATERPILLAR backhoe loaders, including 428C, 428D, 432D, 438C, 442D and others. The separator plate operates in an oil bath, alternating with the friction discs. Its perfectly flat, high-strength steel surface and precise thickness (4.5 mm) are essential for ensuring correct braking force, proper friction, and effective heat dissipation from the brake pack.

Part number: 9R9401 / 9R-9401
Manufacturer: FEROSTEM
Material: Steel
Outer Diameter: 209.2 mm
Inner Diameter: 124 mm
Thickness: 4.5 mm
No. of Teeth: 1 (Refers to a single positioning lug/notch)

FEROSTEM is a specialized manufacturer of brake system components, delivering high-quality discs and plates that are precisely engineered to meet the rigorous demands of construction machinery, ensuring safety and durability.

Essential for Brake Service

  • › Friction Discs: Steel plates work in alternation with friction discs. The entire pack should always be replaced together.
  • › Axle Oil (with LSD additive): Required to refill the axle after the brake service.
  • › Axle Seals: Brake replacement requires removing the planetary hub, which necessitates replacing the axle seals.

Application in machines

Brand Type / Series / Model
CATERPILLAR Backhoe Loaders: 420D, 424D, 426C, 428B, 428C, 428D, 430D, 432D, 436C, 438B, 438C, 438D, 442D

The list above is for reference. We recommend verifying the part number or exact dimensions (OD 209.2mm / ID 124mm / Thickness 4.5mm) before purchasing.

⚠️ Safety Warning

Servicing wet brakes in a drive axle is an advanced repair. It requires the machine to be securely supported on stands and involves removing heavy components (wheels, planetary hub). A faulty brake system is a fatal hazard. Ensure the system is properly bled after repair.

Part's Role in the Machine and Failure Diagnostics

The steel separator plate is the friction counter-surface in a wet brake pack. It alternates with the friction discs. A piston compresses this pack, and the friction between the plates and discs creates the braking force. Wear or damage to these plates is a primary cause of brake failure.

  • › Weak or fading braking power (pedal feels spongy or goes to the floor).
  • › Loud grinding, scraping, or squealing from the axle during braking.
  • › Overheating of the axle and a distinct burning smell.
  • › Presence of excessive metal shavings in the axle oil (a sign of metal-on-metal contact).

📞 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 Kit: Never replace just one plate or only the friction discs. Always replace the entire kit (all steel plates 9R9401 and all friction discs) on both sides of the axle to ensure even braking and correct pack clearance.
  2. Absolute Cleanliness: The brake system is a hydraulic system. Assembly must be done in sterile conditions. The smallest contaminant can damage the brake pump or piston.
  3. Oil Submersion: Before assembly, all new steel plates and friction discs must be generously soaked in the correct axle oil.
  4. Bleeding: After reassembly and refilling with oil, the brake system must be thoroughly bled according to the service procedure.

Frequently Asked Questions (FAQ)

1. What is the difference between a friction disc and a separator plate?

A Separator Plate (9R9401) is a smooth, solid steel disc with an outer positioning lug. A Friction Disc (sold separately) has a friction material (like sintered bronze) and internal teeth (splines) that engage the axle shaft.

2. Can I just replace the worn friction discs and reuse these steel plates?

This is highly discouraged. If the friction discs are worn, the steel plates are almost certainly overheated, discolored, or warped. Reusing old plates with new friction discs will cause the new discs to be destroyed very quickly and will result in a loss of braking power.

3. What is the difference between this plate (9R9401) and 9R2476?

Both are steel separator plates for CAT machines, but they have completely different dimensions. This plate (9R9401) has an inner diameter of 124 mm and is 4.5 mm thick (for 428C/D). The older plate (9R2476) has an inner diameter of 114.3 mm and is 2.7 mm thick (for 428/428B). They are not interchangeable.

Znak zapytania

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.

SKX831880FM
9R-9401
0.81 kg

Data sheet

SUITABLE FOR
CAT
MACHINE TYPE
BACKHOE LOADER
OEM NUMBERS
9R9401
OUTER DIAMETER (MM)
209,2
INNER DIAMETER (MM)
124
THICKNESS (MM)
4,5
NUMBER OF TEETH
1

Specific References

MPN
9R-9401
Łączna ocena:
0,0
Kupiłeś ten produkt? Napisz recenzję dla innych!
Be the first to write your review !
Opinion:
(0 opinions)

Write a review

Plate brake counter suitable for CAT machines

Catalog number: SKX831880FM
Title for your review*
Your review*
Your name*
Your email*

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

33.83 zł

net price
27,50 zł
Available in large quantity Temporarily unavailable
27,50 zł
net price

33.83 zł

gross price
Nie możesz dodać więcej produktów
  • You will receive 3 points, it gives you 1.20 zł
  • Lowest price from 30 days before the discount: 33.83 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    CAT
    MACHINE TYPE
    BACKHOE LOADER
    OEM NUMBERS
    9R9401
    OUTER DIAMETER (MM)
    209,2
    INNER DIAMETER (MM)
    124
    THICKNESS (MM)
    4,5
    NUMBER OF TEETH
    1

    See also similar products

    Plate brake counter suitable for CAT machines
    KAT: 9R2476A

    Plate brake counter suitable for CAT machines

    Available in large quantity Temporarily unavailable
    Price Gross price 21.53 zł
  • You will receive 2 points, it gives you 0.80 zł
  • Nie możesz dodać więcej produktów
    Plate brake friction suitable for CAT machines
    KAT: SKX663705FM2

    Plate brake friction suitable for CAT machines

    Available in large quantity Temporarily unavailable
    Price Gross price 55.97 zł
  • You will receive 5 points, it gives you 2.00 zł
  • Nie możesz dodać więcej produktów
    Plate brake friction suitable for CAT machines
    KAT: SKX663705FM1

    Plate brake friction suitable for CAT machines

    Available in large quantity Temporarily unavailable
    Price Gross price 38.75 zł
  • You will receive 3 points, it gives you 1.20 zł
  • Nie możesz dodać więcej produktów

    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



    Gadu-Gadu communicator
    GG: 4185846 - Daniel
    Phone
    +48 17 864 31 00
    +48 17 864 00 24
    +48 17 864 25 96

    Mobile phone
    +48 607-700-547
    +48 695-944-818
    +48 691-330-531
    +48 690-906-751

    Fax
    +48 17 864 31 20