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PCR-3B-12A-FP-8955A Swing Motor for Kubota KX121-2, KX121-3, KX161-2
Function: It converts hydraulic energy into mechanical rotational force, driving the swing gearbox to rotate the machine's cabin and boom.
Compatible Models
This specific Nachi motor model is most commonly found as original equipment (OEM) in the following mini excavators:
· Kubota: Very common in KX121-2, KX121-3, KX161-2, and KX161-3 models.
· Other Brands: Certain models of Takeuchi, Yanmar, or IHI excavators may also use this series as a standard component.
Thank you for choosing SPARKLING MACHINERY, your reliable supplier of NACHI hydraulic parts. The PCR-3B-12A-FP-8955A swing motor is an original NACHI component designed for Kubota 3–5 ton mini-excavators. Built with heavy-duty cast steel, precision plungers, and premium seals, it delivers strong torque, smooth rotation, and leak-free performance. Perfect for OEM replacement or hydraulic system repair, it minimizes downtime and restores full swing functionality.
The SPARKLING MACHINERY NEW PCR-3B-12A-FP-8955A Swing Motor Photo:
Why Choose the SPARKLING PCR-3B-12A-FP-8955A Swing Motor?
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- Smooth Deceleration: Integrated relief valves ensure that the swing stops smoothly without harsh mechanical jarring.
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- High Torque Density: Provides the necessary power to rotate the excavator even when working on inclines.
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- Plug-and-Play Design: Manufactured to OEM dimensions for a direct fit on the KX121-2, KX121-3, and KX161-2 mounting flanges.
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- Durable Sealing System: Uses premium seals to resist high-pressure spikes and prevent external hydraulic fluid leakage.
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Common Maintenance Parts for Kubota KX Series
When replacing a swing motor, it is highly recommended to service the following related components:
| Part Name | Application Model | Part Function |
| Swing Motor | KX121-2 / KX121-3 | Upper Structure Rotation |
| Hydraulic Return Filter | KX161-2 / KX121-3 | Keeps Hydraulic Oil Clean |
| Swing Bearing Grease | All KX Series | Lubricates the Slewing Ring |
| Pilot Filter | KX121-3 | Protects Control Circuit |
| Final Drive Motor | KX161-2 | Track Travel Movement |
Q&A Section
Q1: Will this motor fit a Kubota KX121-3 Super Series?
A: Yes, the PCR-3B-12A-FP-8955A is the standard configuration for the KX121-3 generation, including most Super Series variants.
Q2: Does this unit include the swing gear/pinion?
A: Most assemblies come with the output shaft/pinion gear attached. However, you should always check the splines on your existing swing bearing to ensure there is no damage to the mating gears.
Q3: What causes a swing motor to lose power?
A: Loss of power is typically caused by internal bypass leakage (worn pistons/cylinders) or a malfunctioning relief valve within the motor head.
About SPARKLING MACHINERY:
- Founded in 2013, SPARKLING focuses on high-quality excavator parts across hydraulics, undercarriage, engines and electrical systems. We prioritize stability, precision and continuous service, offering worldwide distribution, tailored solutions and strict QC to help customers reduce cost and increase uptime.
Get In Touch:
- Replace your failing ECU confidently. Contact SPARKLING for pricing, lead time, and technical support — restore optimal machine control quickly and reliably.
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📦 Packing
1. Packaging methods: Carton box + Wooden case/Pallet + Anti-rust treatment
2. Export-standard packaging to ensure safety during transportation
3. Custom packaging available upon request
4. Dimensions and weight can be provided for freight calculation
🚚 Shipping
1. Available shipping methods: Sea freight, Air freight, Express delivery (DHL, UPS, FedEx, etc.)
2. LCL (Less than Container Load) and FCL (Full Container Load) options are supported
3. For Russian clients, we can introduce the forwarder agent to you
4. Delivery time: Ships within 1-3 working days after payment (for items in stock)
💳 Payment
1. Accepted methods: T/T, Bank Transfer, PayPal, Alipay, WeChat Pay, Western Union
2. Deposit + balance payment available for large or custom orders
3. Flexible payment options—feel free to contact us for details
📌 Frequently Asked Questions (FAQs)
Q: Which excavator models is this part compatible with?
A: This product is compatible with major brands such as CAT, KOMATSU, HITACHI, and more. Custom specifications are also available.
Q: How can I make sure I’m selecting the correct part?
A: You can send us a photo of the old part, part number, or your excavator model, and we will help you confirm the right match.
Q: Is there a warranty for this product?
A: Yes, we offer a 6-month quality guarantee under normal use.
Get a free quote
We are committed to producing the highest quality products at the most competitive prices. Therefore, we sincerely invite all interested companies to contact us for more information.
Contact us
Email: ranroswang@hksparkling.com
Wechat: +86 136 0901 0879
Skype: foreverlucia1
WhatsApp: +86 136 0901 0879
Address: No. 514-515, Hulin Road, Tianhe District, Guangzhou, China.
Sparkling Machinery Co.,Ltd
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Whatsapp: +8613609010879