CAT307C Main Hydraulic Pump – China Remanufactured

1. Key Features & Benefits

• Professionally remanufactured for CAT307C excavators – 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 CAT307C and compatible models – Specifically engineered for Caterpillar 307C, 308C, and 308B 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. The pump is built to fit within the compact engine compartments of these 7–8 ton class excavators, with space-efficient dimensions engineered to integrate seamlessly into the existing hydraulic plumbing and mounting points .

• High-performance hydraulic output – The CAT307C hydraulic system features an open-center, two-pump design with pump flow control that improves fuel efficiency, ensures smooth controllability, reduces sound levels, and extends component life . The main pump delivers a maximum flow of 64 L/min × 2 (128 L/min total) , with a main relief pressure of 27.46 MPa (≈3,980 psi) . This provides the hydraulic power needed for fast cycle times and responsive multi-function operation in tight urban spaces.

• 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 or steel body ensures high strength and durability, ideal for demanding industrial applications . Key circuit pressures include:

  • Travel circuit: 31.38 MPa (≈4,550 psi) 

  • Swing circuit: 19.61 MPa (≈2,840 psi) 

  • Pilot circuit: 4.12 MPa (≈598 psi) 

• Restored compact excavator hydraulic power – After remanufacturing, this pump delivers the full rated flow and pressure your CAT307C was designed for. Your 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. The Cat hydraulics system gives the 307C exceptional efficiency and controllability unmatched in the industry for consistently high performance in all applications .

• 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. Note that the hydraulic pump on certain 307C and 308C mini hydraulic excavators may have had quality issues with the swashplate manufacture at early hours; our remanufacturing process replaces this critical component to ensure long-term reliability .

• 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 CAT307C main hydraulic pump is the power source for 7–8 ton class compact 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. The two-pump system allows simultaneous operation of multiple functions without power loss.

• 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. The 307C’s precise controllability reduces operator fatigue and improves effectiveness, ultimately translating into enhanced performance .

• Agriculture & land management – Drainage ditch cleaning, irrigation trenching, pond maintenance, and fence post holes. The pump’s high-pressure capability (27.46 MPa main relief, 31.38 MPa travel circuit) provides the attachment power needed for augers, trenchers, and rippers.

• Equipment rental fleet – Compact excavators are among 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. FAQ – Frequently Asked Questions

Q1: What is the correct part number for the CAT307C main hydraulic pump?
A: Common OEM part numbers for the CAT307C main pump include 165-9269 (1659269) and 171-5813 (1715813) . The AP2D36LV-925-3 is a widely used replacement model for the CAT307C and 308C . To confirm the correct part for your specific machine, send us your machine serial number and a photo of the old pump nameplate – we will verify within 2 hours.

Q2: Is this a new pump or a remanufactured unit?
A: This is a professionally remanufactured pump. All internal wear components (bearings, seals, cylinder block, valve plate, pistons) are replaced or re-ground to OEM specs. The result is a pump that performs like new – at a fraction of the cost. Caterpillar’s own remanufacturing process restores products to the same quality and performance as new, and our process follows the same rigorous standards .

Q3: What are the key specifications of this pump?
A: The CAT307C main pump delivers a maximum flow of 64 L/min × 2 (128 L/min total) . Main relief pressure is 27.46 MPa (≈3,980 psi) , with travel circuit pressure at 31.38 MPa (≈4,550 psi) and swing circuit pressure at 19.61 MPa (≈2,840 psi) . Pilot circuit pressure is 4.12 MPa (≈598 psi) . The pump weighs approximately 45 kg (100 lb) .

Q4: What is the warranty on this pump?
A: Warranty period is 3 to 6 months depending on product details. We do not provide warranty service for original used or remanufactured parts. Our value is delivered up front: careful remanufacturing, thorough testing, and pre-shipment visual verification. For customers who require a warranty-covered option, we can quote new aftermarket units – ask our sales team.

Q5: How long does delivery take?
A: Delivery is 5–8 working days after order confirmation from our Guangzhou warehouse. Express shipping (DHL/FedEx/UPS) is available for urgent orders.

Q6: What payment methods do you accept?
A: We accept L/C, T/T, XTransfer, PayPal, and Western Union.

Q7: How can I verify the pump is ready before shipping?
A: Before packing, we send you clear, high-resolution photographs of the actual unit – mounting flange, splines, port threads, casting marks, and overall condition. You approve shipment only after reviewing these images. We never ship blind.

Q8: What oil should I use with this pump?
A: Use a mineral oil-based anti-wear hydraulic fluid as recommended by Caterpillar. Proper hydraulic fluid contamination control is essential to prevent premature wear and extend the pump’s working life. Always refer to your CAT307C operator’s manual for the correct viscosity and specification.

Q9: What is the weight of this pump?
A: The main hydraulic pump for the CAT307C weighs approximately 45 kg (100 lb) . Related components like the cylinder block of the AP2D36-type pump weigh around 3 kg, with the overall pump assembly estimated in the 10–20 kg range depending on configuration .

Critical installation tip for the CAT307C remanufactured pump:
– The case drain line must be clear and unrestricted. A blocked or kinked case drain will build back pressure inside the pump housing and blow the shaft seal instantly on first startup.
– Before installing the remanufactured pump, flush the entire hydraulic system and replace all filters. Contaminants from a failed pump will destroy a remanufactured unit just as quickly as a new 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 original used or remanufactured parts. Our value is delivered up front: careful remanufacturing, thorough testing, and pre-shipment visual verification. For customers who require a warranty-covered option, we can quote new aftermarket units – ask our sales team.

The main hydraulic pump is the heart of your CAT307C’s hydraulic system. Our remanufactured pump gives you restored compact excavator performance at a cost that keeps your budget intact – not with shortcuts, but with genuine factory-grade restoration. Send us your machine serial number – we will confirm compatibility and provide a quote within 24 hours.