Clutch pressure spacer - 6mm
FEROSTEM

Clutch pressure spacer - 6mm

Catalog number:SKX831889FM Nr OEM:331/31561 Manufacturer:FEROSTEM
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Clutch Pressure Plate / End Plate (6mm) suitable for JCB - 331/31561

Technical Specification and Compatibility

A high-quality clutch pressure/locating plate 331/31561 by FEROSTEM. This is a key, thick (6 mm) component of the clutch pack, used in the transmissions of JCB machines (3CX, 4CX, Loaders). Its job is to transfer clamping force and provide a solid reaction surface for the disc pack.

Part Number: 331/31561
Alternative Numbers: 445/12301 / 449/10602 / 445/12315
Type: Clutch Pressure Plate / End Plate
Outer Diameter: 139 mm
Inner Diameter: 90 mm
Thickness: 6 mm

FEROSTEM specializes in the production of high-quality, wear-resistant steel castings, such as teeth, cutting edges, and track systems. Our products are designed for maximum resistance to impact and abrasion, ensuring long life even in the toughest quarrying and demolition conditions.

Features of the 331/31561 Pressure Plate

High Hardness: Made from special, surface-hardened steel to withstand enormous clamping forces without deforming.
Heat Resistant: Excellent heat dissipation from the friction discs to prevent clutch burn-up.
Perfectly Flat: Precision manufacturing ensures a perfectly flat surface for even pressure across the entire friction disc.
Precise Teeth: 54 internal teeth are perfectly matched to the clutch drum to transfer full torque.

Application in machinery

Brand Type / Series / Model
JCB Backhoe Loaders: 2DX, 3CX, 4CX
JCB FASTRAC
JCB Forklifts
JCB Telehandlers
JCB Wheel Loaders

The list above is for reference. It is crucial to verify the part number 331/31561 in your machine's transmission parts diagram.

Related Parts and Hardware

The 331/31561 pressure plate is part of a clutch pack. When replacing it, it is essential to also replace the friction discs, other steel plates, and the diaphragm spring (e.g., 445/05110). Piston seals should also be inspected.

⚠️ Safety Warning

A cracked or warped (overheated) pressure plate leads to uneven or insufficient clamping of the clutch pack. This results in clutch slippage, loss of drive, or failure to change direction. This can be extremely dangerous, e.g., when operating on a slope. An overheating clutch will burn the oil and destroy the entire transmission.

Part Role in the Machine and Failure Diagnostics

The 331/31561 plate is a thick (6 mm) steel plate with 54 internal teeth. In a transmission clutch pack, it serves as a locating or pressure plate. It is typically the first or last element in the stack, providing a solid surface for the hydraulic piston or diaphragm spring (e.g., 445/05110) to press against. It must withstand immense clamping forces and heat while evenly transferring pressure to the friction discs.

  • › Transmission "slipping" (engine revs, but machine doesn't accelerate).
  • › Delayed engagement when changing direction (Fwd/Rev) or shifting gears.
  • › Visible overheating (purple/blue discoloration) or cracks on the plate.
  • › Warping or dishing of the plate, causing uneven pressure.
  • › Damaged or worn internal teeth.

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🔧 Expert Guide: Key Installation Tips

  1. Absolute Cleanliness: Assembling transmission components requires sterile cleanliness. Any contaminant can damage seals or block valves.
  2. Replace as a Set: Always replace pressure plates together with a complete set of friction discs and steel separator plates.
  3. Correct Order: Pay close attention to the sequence and orientation of all plates and discs during clutch pack assembly.
  4. Soak Friction Discs: Before installation, new friction discs must be soaked in clean transmission oil (we recommend HYPTRON) for at least 30 minutes.
  5. Check Piston Seals: Before assembling, inspect the piston and its seals. A leaking piston is a common cause of clutch slip.

Frequently Asked Questions (FAQ)

How is this different from a standard steel plate?

Mainly thickness and function. Standard steel plates are thinner and alternate with friction discs. This plate (331/31561) is 6 mm thick and serves as a pressure plate or locating end plate for the entire pack or the diaphragm spring.

Why do I have to replace this plate with the friction discs?

When a clutch slips, it generates extreme heat. This heat causes the plate to "warp" (deform) and lose its flatness. Installing new friction discs against an old, warped pressure plate will cause uneven clamping and burn up the new discs very quickly.

What is the difference between 331/31561 and 445/12301?

These are interchangeable (alternative) numbers for the same part. 445/12301, 449/10602, and 445/12315 are older part numbers that have been superseded by 331/31561.

Question mark

Do you have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you select the right part to get your equipment back to work as quickly as possible.

SKX831889FM
331/31561
0.34 kg

Data sheet

SUITABLE FOR
JCB
MACHINE TYPE
BACKHOE LOADER
FASTRAC
FORKLIFT
TELESCOPIC HANDLER
WHEELED LOADER
OEM NUMBERS
331/31561 / 445/12301 / 449/10602 / 445/12315
OUTER DIAMETER (MM)
139
INNER DIAMETER (MM)
90
THICKNESS (MM)
6
NUMBER OF TEETH
54

Specific References

MPN
331/31561
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Clutch pressure spacer - 6mm

Catalog number: SKX831889FM
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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

46.74 zł

net price
38,00 zł
Available in large quantity Temporarily unavailable
38,00 zł
net price

46.74 zł

gross price
Nie możesz dodać więcej produktów
  • You will receive 4 points, it gives you 1.60 zł
  • Lowest price from 30 days before the discount: 46.74 zł
    PRODUCT SPECIFICATION
    SUITABLE FOR
    JCB
    MACHINE TYPE
    BACKHOE LOADER
    FASTRAC
    FORKLIFT
    TELESCOPIC HANDLER
    WHEELED LOADER
    OEM NUMBERS
    331/31561 / 445/12301 / 449/10602 / 445/12315
    OUTER DIAMETER (MM)
    139
    INNER DIAMETER (MM)
    90
    THICKNESS (MM)
    6
    NUMBER OF TEETH
    54

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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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