KYB PSVD2-21E-7 Hydraulic Main Pump – Genuine Japanese for Yuchai 35 Excavator

1. Key Features & Benefits

• Genuine KYB Japan hydraulic pump – Model PSVD2-21E-7. Manufactured by KYB Corporation (formerly Kayaba), a world‑renowned Japanese hydraulic specialist and OEM supplier to leading excavator manufacturers including Yanmar, Kubota, Hitachi, and Caterpillar. This is a brand‑new, factory‑fresh unit – not remanufactured, not a generic substitute.

• Specifically engineered for Yuchai 35 and 3–5 ton mini excavators – Designed for Yuchai YC35, YC35‑8, as well as Sunward 50/60/70, LiuGong 906, and other 3–5 ton class machines. This pump powers the boom, arm, bucket, swing, and travel circuits with precise, responsive hydraulic flow matched to mini excavator duty cycles.

• PSVD2 series – KYB’s proven mini excavator platform – The PSVD2 series is KYB’s dedicated hydraulic pump family for 2–5 ton compact excavators. The PSVD2-21E features a dual‑pump axial piston variable‑displacement design with a nominal displacement range of 17.9–20.8 cm³/rev. This twin‑pump architecture allows independent flow to separate circuits – travel and working functions operate simultaneously without power loss.

• Four-in-one integrated pump assembly – The PSVD2-21E integrates two variable piston pumps, one gear pump, and one trochoid pump into a single compact housing. This all‑in‑one design eliminates external plumbing, reduces potential leak points, and simplifies installation – critical for the tight engine compartments of mini excavators.

• High‑pressure capability for mini excavator work – Rated for continuous operating pressure of 24.5 MPa (≈3,550 psi) with peak pressure capability up to 35 MPa (≈5,076 psi) for short‑term high‑pressure tolerance. Maximum input speed of 2,400 rpm. This pressure and speed capability deliver consistent digging force, swing torque, and attachment power in the tight spaces and variable loads that define mini excavator work.

• Compact, lightweight design – Weighing approximately 26 kg with a short total length, the PSVD2-21E is designed to fit into the tight engine compartments of 3–5 ton class mini excavators. Lightweight, simple structure with reduced part count.

• Low noise and low pressure ripple – Excellent swash plate and valve plate design delivers quiet operation and smooth pressure delivery. Essential for residential and urban job sites where noise restrictions apply.

• No case drain port – Simplified hydraulic circuit design reduces external plumbing and potential leak points.

• Integrated pilot pump – The PSVD2-21E is equipped with a built‑in pilot pump as a standard configuration, eliminating the need for a separate external pilot pump.

• Long service life – Engineered with high‑quality materials and advanced manufacturing processes for exceptional durability in demanding operating conditions.

• Direct bolt‑on replacement – Mounting flange and hydraulic port configurations match the original KYB PSVD2-21E-7 specifications exactly. No modifications, no adapters – your mechanic unbolts the old pump and bolts this one in.

• Pre‑shipment visual verification – Before packing, we send you detailed high‑resolution photographs of the actual unit (mounting flange, splines, port threads, castings, overall condition). You approve shipment – we never ship blind.

• Fast delivery – 5–8 working days lead time from our Guangzhou warehouse. Monthly supply capacity of 300 units, available for single‑piece or bulk orders.

2. Applications

The genuine KYB PSVD2-21E-7 hydraulic main pump is the power source for Yuchai 35 and 3–5 ton class mini excavators used across a wide range of job sites:

• Urban construction & utilities – Sidewalk repairs, water and gas line trenching, fibre‑optic cable installation, and small‑scale demolition in tight access spaces. The pump’s compact design, low noise operation, and precise flow control are essential for working near existing structures and utilities. The twin‑pump architecture provides “fine‑touch” flow for delicate digging near existing utilities while delivering enough power for breaking compacted surfaces.

• Residential landscaping & pool excavation – Pool digs, retaining walls, grading, and drainage work. The pump’s smooth response, quiet operation, and variable displacement control minimise disturbance to nearby homes, while the high‑pressure capability (24.5 MPa continuous, 35 MPa peak) provides the power needed for attachments like augers and trenchers.

• Agriculture & land management – Drainage ditch cleaning, irrigation trenching, pond maintenance, and fence post holes. The pump’s rated pressure of 24.5 MPa provides the attachment power needed for rippers and post‑hole augers, while the variable displacement control adapts to changing load conditions, improving efficiency and reducing fuel consumption in long‑duration agricultural work.

• Equipment rental fleet – Mini excavators are the most frequently rented machines. A genuine new pump provides predictable service life and eliminates the gamble of remanufactured or used units – avoiding costly mid‑rental failures, towing bills, and customer complaints.

• Forestry & vegetation clearance – Steep slopes, fallen timber, and uneven terrain demand reliable hydraulic performance. The integral control system prevents engine stall under sudden load spikes, maintaining consistent power for saws, grapples, and mulchers.

• Road & bridge maintenance – Shoulder repairs, guardrail replacement, and drainage cleaning. The pump’s responsive control allows operators to position attachments precisely for roadside work, even in tight work zones with limited space.

3. Why Choose Hongtengda Parts

Since 2001, Hongtengda Parts has been a leading distributor of earthmoving machinery parts, serving customers across Southeast Asia, the Middle East, Africa, the Americas, and Oceania. Headquartered in Guangzhou’s Zhucun parts hub – one of Asia’s major distribution centres for construction machinery parts – we combine deep inventory, cross‑brand knowledge, and reliable global shipping to keep your machines running.

What you get when you order from us:

• 25 years of heavy equipment parts experience – Since 2001, we have been the go‑to supplier for repair shops, fleet owners, and wholesalers worldwide. We know the PSVD2 series platform inside out – the different control variants, mounting configurations, and production changes over the years.

• 90% of our catalog in stock – Your PSVD2-21E-7 pump sits in our Guangzhou warehouse, not in a supplier’s backlog. From hydraulic pumps to undercarriage kits, most orders are dispatched within 24 hours on fumigated, export‑ready pallets.

• One supplier, all parts – Got a serial number, a model code, or just a photo of a worn‑out part? Our specialists cross‑reference across Yuchai, Hitachi, Caterpillar, Komatsu, Kobelco, Sany, XCMG, SDLG, TZ, and 15+ brands to find what you need. OEM, OEM‑quality, or hard‑to‑find older model parts – we handle the search so you don’t have to.

• Own maintenance factory and technical team – Equipped with our own maintenance factory and a team of experienced technicians, we provide global customers with one‑stop solutions covering parts supply, technical support, and equipment maintenance. Whether you’re a repair shop needing one urgent pump or a distributor stocking full hydraulic kits, we serve both with the same commitment: competitive pricing, professional export packaging, and after‑sales support that keeps you coming back.

• Pre‑shipment verification – We never ship a pump blind. You receive clear photos of the actual unit before packing – you approve, we ship. When downtime costs money, we move at your speed.

• After‑sales support that works – Three senior technicians review your case together. If it’s a quality issue – we cover it. If not – we still guide you through the fix. We don’t just sell parts; we keep you running.

Critical installation tip for the PSVD2-21E-7 pump:
– The PSVD2-21E-7 has no case drain port. Ensure the suction line is properly sized and free of restrictions. Check the suction strainer is clean before installation.
– Before installing the new pump, flush the entire hydraulic system and replace all filters. Contaminants from a failed pump will destroy a new pump just as quickly as an old one – debris does not discriminate.
– Use new O‑rings and sealing washers on every hydraulic connection. Reused seals guarantee leaks.
– After installation, run the engine at low idle for 2‑3 minutes with the pump in neutral, then slowly cycle each function (boom, arm, bucket, swing, travel) to purge air from the system.
– Check pump alignment with the engine flywheel housing – misalignment causes premature bearing wear and shaft seal leakage.

Warranty note: Warranty period is 3 to 6 months depending on product details. We do not provide warranty service for genuine original parts. Our value is delivered up front: genuine KYB Japan components, new‑condition pump, and pre‑shipment visual verification. For customers who require a warranty‑covered option, we can quote aftermarket alternatives – ask our sales team.

The main hydraulic pump is the heart of your Yuchai 35’s hydraulic system. A genuine new KYB PSVD2-21E-7 from Hongtengda Parts delivers the reliability and performance your 3–5 ton mini excavator demands – not with worn components disguised as “rebuilt”, but with factory‑fresh Japanese engineering. Send us your machine serial number – we will confirm compatibility and provide a quote within 24 hours.