CAT 305.5 / 306E Main Hydraulic Pump – China Remanufactured (397-3825)

Description

Detail Information

Note: The application information provided is for reference only. Please confirm the part number and compare it with the old component before purchasing. If you have any questions, please feel free to contact us.
It is worth choosing a product that features stable performance, high reliability, easy installation, and quick response.

1. Key Features & Benefits

• Professionally remanufactured for CAT mini excavators – This main hydraulic pump (OEM 397-3825) has been fully disassembled, cleaned, crack-inspected, and rebuilt to meet Caterpillar‘s original equipment specifications. Every critical component – cylinder block, piston assemblies, valve plate, swashplate, bearings, and seals – is either renewed or replaced with new, high-quality parts. The result is restored hydraulic performance at a fraction of the cost of a new genuine pump.

• Direct replacement for CAT 305.5 and 306E mini excavators – Specifically engineered for Caterpillar 305.5, 305.5E, 306, and 306E series compact excavators. This pump powers the boom, arm, bucket, swing, and travel circuits with the precise, responsive hydraulic flow required for urban construction, landscaping, and utility work.

• High-pressure capability for compact excavator work – Designed for Caterpillar‘s compact excavator hydraulic systems, this pump delivers consistent pressure and flow under varying loads. The rugged cast-iron construction provides outstanding performance and high-pressure capabilities for most mobile hydraulic applications.

• Restored 3-ton class hydraulic power – After remanufacturing, this pump delivers the full rated flow and pressure your CAT 305.5 or 306E was designed for. Your mini excavator regains original digging force, smooth swing control, and precise attachment response – eliminating the sluggish performance caused by internal wear and leakage.

• Energy-efficient performance – The remanufactured pump features a pressure-balanced design that provides high volumetric and mechanical efficiencies. This translates directly to lower fuel consumption and reduced operating costs over thousands of hours.

• High-performance sealing system – Premium seals and gaskets are installed during remanufacturing to withstand extreme hydraulic pressures and temperatures. This prevents internal and external leakage, maintaining peak efficiency and extending pump service life.

• Direct bolt-on replacement – Mounting flange, drive shaft spline, and hydraulic port configurations are restored to original Caterpillar specifications. 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 remanufactured CAT 397-3825 main hydraulic pump is the power source for CAT 305.5 and 306E 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 precise flow control provides “fine-touch” response for delicate digging near existing structures 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 and efficient operation minimise disturbance to nearby homes, while the variable displacement control adapts to changing load conditions.

• Agriculture & land management – Drainage ditch cleaning, irrigation trenching, pond maintenance, and fence post holes. The pump’s high-pressure capability provides the attachment power needed for augers, trenchers, and rippers.

• Equipment rental fleet – Mini excavators are the most frequently rented machines. A remanufactured pump offers predictable service life (typically 3,000–5,000 hours) at a cost that makes proactive replacement financially sensible – avoiding costly mid-rental failures, towing bills, and customer complaints.

• 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.

• Forestry & vegetation clearance – Steep slopes, fallen timber, and uneven terrain demand reliable hydraulic performance. The pump’s consistent pressure output maintains stable power for saws, grapples, and mulchers.

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 CAT 305.5 and 306E platform inside out – the different control variants, mounting configurations, and production changes over the years.

• Remanufacturing that delivers performance comparable to new – Our remanufacturing process follows strict quality standards to ensure same-as-new quality and performance. Each pump is rebuilt using precision engineering principles, with all critical wear components replaced – not just patched or resealed.

• 90% of our catalog in stock – Your 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 Caterpillar, Komatsu, Hitachi, Sany, 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.

• 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.

• Cost-effective alternative to new OEM – Remanufactured pumps typically cost 50–80% of new OEM prices while delivering the same performance and reliability. This makes proactive replacement financially accessible for fleet owners and repair shops alike.

• 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.

Send us your CAT 305.5 or 306E machine serial number and a photo of the old pump – we will confirm the exact model and quote you within 24 hours.