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Small But Mighty: The AP2D28A Hydraulic Pump That Drives Performance
“It’s not the size of the pump that matters, it’s the power it delivers.”
In the compact world of mini excavators and skid steers, performance is often underestimated. But beneath the steel skin of your machine, one small yet powerful component makes all the difference — introducing the AP2D28A Hydraulic Pump.
This little giant may not look like much, but it's the unsung hero behind every smooth swing, precise dig, and effortless lift.
🔧 What is the AP2D28A Hydraulic Pump?
The AP2D28A is a piston-type hydraulic pump designed primarily for compact and mini excavators, including popular models from Hitachi, CAT, Hyundai, and Yanmar. With a displacement of 28cc/rev, it punches far above its weight in terms of efficiency and responsiveness.
Whether you're trenching in a tight backyard or loading gravel on a busy site, this pump keeps your machine operating like clockwork.
⚙️ Quick Specs at a Glance
Feature | Specification |
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Model | AP2D28A |
Pump Type | Axial Piston Double Pump |
Displacement | 28 cc/rev |
Rated Pressure | Up to 28 MPa (280 bar) |
Application Range | 2–4 ton class excavators |
Brands Compatible | Hitachi ZX30, CAT 303, Hyundai R35, Yanmar VIO35 |
🚜 Big Power in Small Packages
Think of the AP2D28A as the heartbeat of your mini-excavator. When you move the joystick, it's this pump that translates your action into precise hydraulic energy — powering your boom, arm, bucket, and travel motors in perfect harmony.
Key benefits:
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✅ Compact & Lightweight – Easy to install, perfect for small frames
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✅ Fast Response Time – Boosts operator efficiency on tight job sites
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✅ Long Service Life – Built from high-quality alloy steel and engineered seals
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✅ OEM Compatible – 100% fit with original systems, no modification needed
💬 Real Operator Talk
“We had an older ZX30 with jerky motion. Swapped in a new AP2D28A pump — the difference was night and day. Smooth, quiet, powerful.”
— Mini Excavator Operator, Australia
“This pump is our best-seller for compact equipment repairs. We keep five in stock at all times.”
— Hydraulic Parts Dealer, South Africa
🎯 Who Is This Pump For?
If you’re:
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A repair shop handling mini-excavator overhauls
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A parts dealer seeking reliable aftermarket products
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A fleet owner running light equipment daily
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A DIY mechanic breathing new life into an old machine
…then the AP2D28A pump belongs in your toolbox (or your next shipment).
🌍 Global-Ready Replacement
We offer aftermarket AP2D28A pumps with:
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Full internal component testing
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High-pressure capability
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Oil-sealed packaging
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Fast international delivery
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Optional piston kit, valve plate, swash plate available separately
📦 How to Order
Let us know your machine model, required quantity, and destination — we’ll handle the rest.
💡 Pro Tip
Always flush your hydraulic system before installing a new pump. Contaminants from an old failed pump are the #1 killer of new replacements.
🏁 Final Thoughts
The AP2D28A Hydraulic Pump proves that big things come in small packages. It’s compact, it’s powerful, and it’s trusted by contractors and mechanics around the world.
So, if your mini machine needs a maximum comeback, this is the pump that can make it happen.
Don’t just repair. Revive.
Don’t just replace. Upgrade.
Choose AP2D28A — because your machine deserves better than average.





FAQ
Do you offer bulk purchasing options?
Yes, we offer competitive pricing for bulk orders. If you are interested in purchasing large quantities of parts, please contact our sales team to discuss your requirements and receive a customized quote.
What is your shipping policy?
We offer a variety of shipping options to meet your needs. Orders are typically processed within [insert processing time] days, and delivery times may vary based on your location. We will provide you with tracking information once your order has shipped.
Can I return or exchange parts if I change my mind?
Yes, we accept returns and exchanges within [insert return period, e.g., 30 days] of purchase. The items must be unused and in their original packaging. Please contact our customer service team to initiate a return or exchange.
How can I place an order?
You can place an order through our user-friendly online platform or by contacting our sales team directly. Simply browse our catalog, select the parts you need, and follow the checkout process to complete your order.
What types of excavator parts do you offer?
Weihuparts provides a comprehensive range of excavator parts, including but not limited to buckets, hydraulic components, undercarriage parts, and engine components. Our goal is to be your one-stop solution for all excavator needs.

The AP2D28A hydraulic pump is a compact axial piston pump commonly used in small and medium-sized excavators. Engineered for efficient performance and long service life, it’s ideal for use as a travel main pump in tight-space construction equipment. This model is compatible with a variety of OEM and replacement systems, providing a reliable solution for excavator maintenance or upgrades.
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✔️ Direct fit for many mini/mid-size excavators
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✔️ Compact axial piston design for efficient operation
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✔️ OEM and aftermarket versions available
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✔️ High-pressure performance and smooth fluid flow
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✔️ Long service life and reliable sealing
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✔️ Factory direct price and fast international shipping
- 🛒 Order Your AP2D28A Hydraulic Pump Today – Quality Assured. Global Support.
📞 Contact Us for stock availability, wholesale pricing, or compatibility check.
🚚 Fast Global Shipping | OEM & Aftermarket Options | 24h Response