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MFB80 SG04 SG04E Swing Motor Valve Plate Spring – Set of 4 is backordered and will ship as soon as it is back in stock.
Powering 10,000+ Commercial Fleets
One Year Warranty
Easy 60-day Return
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A complete set of 4 direct replacement valve plate springs for MFB80, SG04, and SG04E swing motors. The valve plate springs maintain constant seating pressure between the valve plate and the cylinder block rotor, ensuring a leak-free hydraulic seal during operation. Fatigued or broken springs result in internal bypass, loss of hydraulic pressure, and reduced swing torque — making this set essential for any thorough swing motor rebuild.
Fab Heavy Parts is excited to offer a 12-month warranty on all new replacement/aftermarket parts starting from your original purchase date.
Enjoy peace of mind with Fab Heavy Parts!
For more warranty details, please check out our warranty policy.
Estimated delivery time 3-6 workdays
We don't have a core charge for any products.
To start a return, please use our return portal. Items should be unused, not installed, clean, in their original packaging and accompanied by proof of purchase. Please contact support if you need help with the current return instructions or applicable costs.
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Most packages delivered within New Zealand arrive in 4–7 working days. Packages over 68 kg can take 5–10 working days. Timing can also vary with product availability, destination, shipping service, customs processing, weekends, public holidays or carrier delays.
New Zealand orders are billed in NZD.
Compare the listed part number, machine make, model, engine details and specifications with your equipment records. Fitment can vary by configuration and serial range, so contact support with the part number and machine details if you are unsure. Fitment should be confirmed before installation.
Mailed & Couriered Shipments (Online Shopping)
For NZ$1,000 or less goods value, no customs duty or border entry fees are collected by the New Zealand Customs Service.
For over NZ$1,000 customs value, formal customs entry is required and the customer must pay 15% GST, applicable customs duties, and border processing fees such as the Import Entry Transaction Fee.
A complete set of 4 direct replacement valve plate springs for MFB80, SG04, and SG04E swing motors. The valve plate springs maintain constant seating pressure between the valve plate and the cylinder block rotor, ensuring a leak-free hydraulic seal during operation. Fatigued or broken springs result in internal bypass, loss of hydraulic pressure, and reduced swing torque — making this set essential for any thorough swing motor rebuild.