CAT 349D Main Hydraulic Pump – China Remanufactured

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

• Precision‑remanufactured to Caterpillar OEM standards – This main hydraulic pump 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 349D / 349D2 / 345D series excavators – Specifically engineered for Caterpillar 349D, 349D2, 345D, and related 45–50‑ton class excavators. This axial piston pump powers the boom, arm, bucket, swing, and travel circuits with the precise, high‑volume flow required for heavy mining, quarrying, and large‑scale earthmoving operations.

• Massive hydraulic output for 45–50‑ton class work – The CAT 349D main hydraulic system delivers a maximum flow of 734 L/min (194 gal/min) , with a main relief setting of 35 MPa (≈5,076 psi) . The pump features a displacement of 214 cm³/rev, providing the substantial hydraulic power needed for fast cycle times, high bucket fill factors, and responsive multi‑function operation.

• High‑pressure capability for demanding applications – Rated pressure of 34.3 MPa (≈4,975 psi) with maximum pressure up to 39.2 MPa (≈5,685 psi) . This pressure capability delivers consistent digging force, swing torque, and travel power hour after hour. The hydraulic cross‑sensing system utilizes each of the two hydraulic pumps to 100% of engine power under all operating conditions, maximising productivity in the toughest conditions.

• Energy‑efficient, optimized design – Features an optimized swash plate design that reduces heat generation and internal friction. The pump regulators are factory‑calibrated to interface seamlessly with the CAT machine control system (ECM), ensuring smooth load‑sensing and flow‑sharing capabilities. The hydraulic system provides automatic priority function for boom‑up and swing operations, eliminating the need for work mode buttons.

• Superior durability and contamination resistance – Utilizes high‑strength alloy cylinder blocks and precision‑lapped piston shoes to ensure minimal internal leakage and maximum volumetric efficiency. Equipped with oversized, low‑friction bearings to withstand the high radial and axial loads generated during multi‑function hydraulic movements. Premium seals and gaskets are installed to withstand extreme pressures and temperatures.

• Heavy‑duty construction for extreme conditions – Built with a robust, reinforced structural design that ensures stable high‑pressure output even under extreme loads. The pump body is manufactured from high‑strength materials with excellent wear and impact resistance. Regeneration circuits for boom and stick enhance efficiency and reduce cycle times, while the reverse swing damping valve provides smooth, controlled swing motion.

• 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 349D main hydraulic pump is the power source for 349D, 349D2, and 345D series excavators used in the most demanding job sites:

• Large‑scale open‑pit mining – 45–50‑ton excavators are the backbone of copper, gold, iron ore, and coal mining operations. The pump‘s 214 cm³/rev displacement and 734 L/min flow deliver fast loading cycles and consistent digging force hour after hour in remote mine sites where reliability is critical. The hydraulic cross‑sensing system ensures 100% engine power utilization under all operating conditions, maximising productivity in the toughest overburden and ore extraction conditions.

• Quarrying & aggregates – Loading trucks, stockpile management, and material handling in granite, limestone, and basalt quarries. The pump’s robust alloy cylinder blocks and precision‑lapped piston shoes withstand abrasive dust conditions, while the load‑sensing flow‑sharing capability provides smooth, responsive operation for precise bucket control. The automatic boom‑up and swing priority function eliminates the need for work mode buttons, allowing operators to focus on production.

• Heavy construction & infrastructure – Highway excavation, dam building, bridge footings, and large‑scale earthmoving projects. The pump‘s massive flow (734 L/min) and high‑pressure capability (35 MPa) deliver consistent digging force and swing torque hour after hour, while the energy‑efficient design reduces fuel consumption across long shifts. Regeneration circuits for boom and stick enhance efficiency and reduce cycle times.

• Demolition & scrap processing – Shock loads, vibration, and sharp debris are routine in demolition yards and metal recycling facilities. The pump’s reinforced structural design and heavy‑duty bearings absorb these extreme conditions without premature wear. The reverse swing damping valve provides smooth, controlled swing motion in demanding demolition environments.

• Equipment rental fleet – 45–50‑ton excavators are high‑value rental assets. A remanufactured pump offers predictable performance at a cost that makes proactive replacement financially sensible – avoiding costly mid‑rental failures, towing bills, and customer complaints.

• Forestry & land clearing – 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, even under varying load conditions.

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 349D platform inside out – the different engine variants (C13 ACERT), control systems, 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. Cat Certified Hydraulic Rebuilds bring pumps, motors, and valves back to like‑new performance, reliability, and durability.

• 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 deliver the same performance as new Cat pumps while priced at a fraction of the cost. 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.