Plate brake friction suitable for CAT machines
FEROSTEM

Plate brake friction suitable for CAT machines

Catalog number:SKX663705FM2 Nr OEM:9R2477 Manufacturer:FEROSTEM
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GX-AFTER BRAKE FRICTION DISC (SBRZ) FOR CAT 416B, 428B - 9R2477

Technical Specification and Compatibility

A key component of the wet brake pack – this is a precision-made brake friction disc by GX-AFTER. It is designed for the drive axles in CATERPILLAR backhoe loaders (e.g., 416B, 426B, 428B, 436B, 438B) and compactors (CP/CS). Unlike steel plates, this disc features a high-performance Sintered Bronze (SBRZ) friction material and 22 internal teeth (splines) to engage the axle shaft. The special "waffle" groove pattern (SPR/WAG) ensures optimal oil circulation, cooling, and smooth braking.

Part number: 9R2477 / 9R-2477
Manufacturer: GX-AFTER
Material: Sintered Bronze (SBRZ)
Groove Type: SPR/WAG (Waffle Pattern)
Outer Diameter: 204.5 mm
Inner Diameter (Spline): 53.3 mm
Thickness: 4.8 mm
No. of Teeth (Splines): 22

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

Essential for Brake Service

  • › Steel Separator Plates (e.g., 9R2476): Friction discs work in alternation with steel plates. 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: 416, 416B, 426, 426B, 428, 428B, 436, 436B, 438, 438B
Compactors: CP-563C, CS-531C, CS-531D, CS-563C, CS-573D, CS-583C, CS-583D

The list above is for reference. We recommend verifying the part number or exact dimensions (OD 204.5mm / 22 Teeth / Thickness 4.8mm) 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 friction disc is the executive component in a wet brake pack. It has internal splines (22 teeth) that engage the axle shaft. During braking, a piston compresses the pack, and the friction between these SBRZ discs and the steel separator plates (9R2476) stops the machine. Wear or damage to these discs is the 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).

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🔧 Expert's Guide: Key Installation Tips

  1. Replace as a Kit: Never replace just one friction disc. Always replace the entire kit (all friction discs 9R2477 and all steel plates 9R2476) 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 friction discs must be generously soaked in the correct axle oil (with LSD additive). Do not install them dry.
  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 this disc (9R2477) and the plate (9R2476)?

This disc (9R2477) is the friction component (made of Sintered Bronze - SBRZ) and has internal teeth (22 splines) that engage the axle shaft. The plate (9R2476) is the smooth steel separator disc that goes between the friction discs.

2. What does SBRZ and SPR/WAG mean?

SBRZ stands for Sintered Bronze, which is the high-performance friction material used in wet brakes. SPR/WAG (Spring/Waffle) refers to the specific "waffle" groove pattern on the disc's surface, which helps oil circulation and cooling.

3. Will this fit a CAT 428C, D, E, or F?

No. This part number 9R2477 is specific to the older CATERPILLAR 416, 426, 428, 436, 438 and their B-series variants. Newer machines (C, D, E, F) use completely different axles and brake packs with different part numbers and dimensions.

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.

SKX663705FM2
9R2477
0.80 kg

Data sheet

SUITABLE FOR
CAT
MACHINE TYPE
BACKHOE LOADER
OEM NUMBERS
9R2477
OUTER DIAMETER (MM)
204,5
INNER DIAMETER (MM)
53,3
THICKNESS (MM)
4,8
NUMBER OF TEETH
22

Specific References

MPN
9R2477
Łączna ocena:
0,0
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Plate brake friction suitable for CAT machines

Catalog number: SKX663705FM2
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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

55.97 zł

net price
45,50 zł
Available in large quantity Temporarily unavailable
45,50 zł
net price

55.97 zł

gross price
Nie możesz dodać więcej produktów
  • You will receive 5 points, it gives you 2.00 zł
  • Lowest price from 30 days before the discount: 55.97 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    CAT
    MACHINE TYPE
    BACKHOE LOADER
    OEM NUMBERS
    9R2477
    OUTER DIAMETER (MM)
    204,5
    INNER DIAMETER (MM)
    53,3
    THICKNESS (MM)
    4,8
    NUMBER OF TEETH
    22

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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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