Komatsu 708-1U-00360 Swing Motor – China Remanufactured for D51 / D85EX / D85PX / WA430

Description

Detail Information

1. Key Features & Benefits

• Professionally remanufactured to Komatsu OEM standards – This swing motor (OEM 708-1U-00360) has been fully disassembled, cleaned, crack-inspected, and rebuilt to meet Komatsu’s original equipment specifications. Every critical component – cylinder block, piston assemblies, valve plate, bearings, and seals – is either renewed or replaced with new, high-quality parts. The result is restored swing performance at a fraction of the cost of a new genuine unit.

• Broad compatibility across Komatsu dozers and wheel loaders – Engineered for Komatsu D51, D85EX, D85PX, and WA430 series machines. The D51 is a medium-sized dozer delivering 105 kW with excellent maneuverability for medium-sized construction sites, while the D85EX/PX-15E0 is a 27.65–28.1 tonne bulldozer available in standard and low-ground-pressure undercarriage versions. The WA430-6 wheel loader features Komatsu’s advanced power-train technology and delivers high power and torque at low revs. This swing motor powers the upper structure rotation, working with the swing reducer, swing bearing, and brake system to control smooth slewing movement.

• Restored swing performance – After remanufacturing, this motor delivers the full rated torque and rotational speed your machine was designed for. Your dozer or wheel loader regains smooth, responsive slewing control – eliminating the sluggish or erratic swing caused by internal wear and leakage. The integrated disc brake mechanically stops motor rotation when the swing lock is actuated.

• 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 swing operations. Premium seals and gaskets are installed to withstand extreme pressures and temperatures.

• Energy-efficient, optimized design – Features an optimized design that reduces heat generation and internal friction. The motor is factory-calibrated to interface seamlessly with the Komatsu hydraulic control system, ensuring smooth, predictable swing response. A correctly functioning swing motor ensures stable system pressure, safeguarding other costly components like control valves and swing gearboxes.

• Direct bolt-on replacement – Mounting flange, drive shaft spline, and hydraulic port configurations are restored to original Komatsu specifications. No modifications, no adapters – your mechanic unbolts the old motor 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 Komatsu 708-1U-00360 swing motor is the power source for swing systems on D51 and D85EX/D85PX dozers and WA430 wheel loaders used across a wide range of job sites:

• Heavy construction & infrastructure – D85EX dozers are 28+ tonne machines used for highway construction, dam building, and large-scale earthmoving. The swing motor delivers smooth, responsive rotation for precise blade positioning and material handling. The D51EX/PX-22, weighing 13.22–13.77 tonnes, supplies high drawbar pull when needed and a highly fuel-efficient drive line for grading and precision work.

• Quarrying & aggregates – Material handling, stockpile management, and site preparation in granite, limestone, and basalt quarries. The motor’s robust construction and contamination-resistant design withstand abrasive dust conditions.

• Mining support – Site cleanup, road maintenance, and equipment pad grading. A remanufactured swing motor with new bearings and seals provides predictable service life – avoiding costly unplanned downtime in remote mine sites.

• WA430 wheel loader operations – The WA430-6 wheel loader is used for loading trucks, material handling, and stockpile management. The swing motor ensures smooth, responsive slewing for precise bucket positioning and efficient cycle times.

• Equipment rental fleet – Dozers and wheel loaders are high-value rental assets. A remanufactured swing motor 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 – Clearing vegetation, pushing fallen timber, and firebreak construction. The swing motor’s consistent torque output maintains stable power for blade operations, even under varying load conditions.

3. FAQ – Frequently Asked Questions

Q1: Is this swing motor an exact replacement for my Komatsu D51, D85EX, D85PX, or WA430?

A: Yes. The 708-1U-00360 is the genuine Komatsu swing motor for these series. It is listed as a Piston Pump Motor assembly in Komatsu’s parts system. To confirm compatibility for your specific machine variant, send us your machine serial number and a photo of the old motor nameplate – we will verify within 2 hours.

Q2: Is this a new motor or a remanufactured unit?

A: This is a professionally remanufactured motor. All internal wear components (bearings, seals, cylinder block, valve plate, pistons) are replaced or re-ground to OEM specs. The result is a motor that performs like new – at a fraction of the cost.

Q3: What are the key specifications of this swing motor?

A: This is a hydraulic swing motor with an integrated disc brake that mechanically stops rotation when the swing lock is actuated. It is designed to work with the swing reducer, swing bearing, and brake system to control smooth slewing movement. The motor is part of Komatsu’s CLSS (Closed Centre Load Sensing System), operating at working pressures up to 350 bar. For exact specifications for your machine variant, please contact us with your serial number.

Q4: What is the warranty on this motor?

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 motor 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 motor?

A: The hydraulic motor section uses the machine’s main hydraulic oil (typically ISO VG 46). The gearbox side requires gear oil – refer to your Komatsu operator’s manual for the correct viscosity and specification. Regularly check the oil level of the swing motor and swing gearbox; if the oil level is too low, add the appropriate amount.

Q9: What are common signs of swing motor failure?

A: Common symptoms include: slow or erratic swing response, loss of swing power on slopes, unusual noises during swinging, hydraulic fluid leaks from the motor, or the swing lock not holding properly. The swing motor is equipped with a disc brake that mechanically stops motor rotation; if the brake fails to hold, the motor may need attention.