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SG020 / MFB45 Piston Assembly Set for Swing Motor (9 Pieces) 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
Expert support & Fitment Guarantee
Restore full hydraulic power and swing motor efficiency with this complete 9-piece piston assembly set, engineered as a direct OEM-compatible replacement for SG020 and MFB45 series swing motor assemblies. The pistons are the core of the rotating group — converting hydraulic pressure into the rotational force that drives your excavator's swing function. Worn pistons result in reduced torque, internal leakage, and eventual motor failure, making timely replacement essential for keeping your machine productive.
Fits SG020 and MFB45 swing motor assemblies. Please verify your motor model and part number before ordering to ensure correct fitment.
We stock the precision rotating group components your swing motor rebuild requires. Every part is sourced to meet or exceed OEM standards — so you can restore peak performance and minimize costly downtime.
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.
Orders placed within one hour and not yet fulfilled can be cancelled from the customer order page. After one hour, or once the order has been fulfilled, please contact support for the next steps.
Available payment methods include major credit and debit cards, PayPal, Apple Pay, Google Pay, Shop Pay and Klarna. Availability can vary by order and checkout, so the payment options shown at checkout apply.
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.
Restore full hydraulic power and swing motor efficiency with this complete 9-piece piston assembly set, engineered as a direct OEM-compatible replacement for SG020 and MFB45 series swing motor assemblies. The pistons are the core of the rotating group — converting hydraulic pressure into the rotational force that drives your excavator's swing function. Worn pistons result in reduced torque, internal leakage, and eventual motor failure, making timely replacement essential for keeping your machine productive.
Fits SG020 and MFB45 swing motor assemblies. Please verify your motor model and part number before ordering to ensure correct fitment.
We stock the precision rotating group components your swing motor rebuild requires. Every part is sourced to meet or exceed OEM standards — so you can restore peak performance and minimize costly downtime.