Komatsu Swing Drive (Without Motor)
Heavy Duty Excavator Swing Gearbox

Reliable Komatsu Swing Drives Supplied by TOSOG

At TOSOG, we specialise in the supply of high-quality Komatsu swing drives (without motor) engineered to deliver smooth, controlled upper-structure rotation, high torque transmission, and extended service life in the most demanding earthmoving, mining, quarrying, and construction environments. Our swing drives are designed to perform reliably under continuous load, high shock forces, and harsh operating conditions, ensuring consistent excavator performance and reduced risk of unexpected failures.

A Komatsu swing drive, also referred to as a swing reduction gearbox, swing gear unit, or slew drive, is a mission-critical excavator component responsible for converting hydraulic motor power into precise rotational movement of the upper structure. This rotation enables the excavator to slew smoothly while lifting, digging, and positioning heavy loads. The swing drive transmits power from the hydraulic motor through a multi-stage planetary reduction system, increasing torque while maintaining controlled rotational speed and stability.

Our motor-less Komatsu swing drives consist of a heavy-duty gearbox housing, hardened planetary gear sets, precision-machined shafts, high-load bearings, and reinforced output pinions that mesh accurately with the excavator’s swing ring (slew ring). By supplying the swing drive without the hydraulic motor, TOSOG offers a cost-effective replacement solution for operators whose swing motor remains in good working condition. This approach significantly reduces repair costs, shortens lead times, and minimises machine downtime while maintaining full operational capability.

These swing drives are particularly suited to:

• Component rebuilds and refurbishments

• Breakdown repairs where the motor is still serviceable

• Fleet maintenance strategies focused on cost control

• Plant hire and mining operations requiring fast turnaround

Whether you operate Komatsu excavators in open-pit mining, civil engineering projects, road construction, bulk earthworks, quarrying, or plant hire fleets, TOSOG provides OEM-equivalent and high-quality aftermarket swing drives that meet or exceed original equipment performance, durability, and fitment requirements. Each unit is manufactured or sourced with strict attention to gear accuracy, load capacity, sealing performance, and structural integrity, ensuring reliable operation over extended service intervals.

By choosing TOSOG for your Komatsu swing drive without motor, you benefit from a solution that delivers:

• Optimised torque transfer for smooth slewing under load

• Reduced backlash and vibration for precise machine control

• Robust construction to withstand shock loads and harsh conditions

• Compatibility with original Komatsu swing motors

• Lower total cost of ownership compared to full swing drive assemblies

TOSOG’s technical expertise, extensive sourcing network, and deep understanding of Komatsu excavator driveline systems allow us to match the correct swing drive configuration to your specific machine model, application, and operating environment—ensuring dependable performance, extended component life, and maximum productivity on site.

What Is a Komatsu Swing Drive (Without Motor)?

A Komatsu swing drive without motor consists of:

• Heavy-duty reduction gearbox

• Precision-cut planetary gears

• High-strength housing and bearings

• Output pinion that meshes with the swing ring (slew ring)

It excludes the hydraulic motor, making it ideal when:

• The swing motor is still in good condition

• You want a lower-cost repair solution

• You are rebuilding or refurbishing an excavator

Key Benefits of TOSOG Komatsu Swing Drives

✔ Cost-effective replacement solution
✔ Designed for high torque and continuous duty
✔ Smooth, controlled excavator rotation
✔ Reduced vibration and backlash
✔ Heavy-duty materials for long service life
✔ Compatible with OEM Komatsu swing motors
✔ Available for multiple Komatsu excavator models

Compatible Komatsu Excavator Models (Typical)

We supply swing drives (without motor) for many Komatsu machines, including:

• PC200 / PC210 / PC220

• PC300 / PC350

• PC400 / PC450

• PC600

• PC700 / PC800

• Selected older and new-generation Komatsu models

📌 If your model is not listed, contact TOSOG with your machine serial number for confirmation.

Applications

• Mining excavators

• Civil and road construction

• Quarrying operations

• Plant hire fleets

• Heavy earthmoving projects

Why Buy Komatsu Swing Drives from TOSOG?

At TOSOG, we understand the cost of downtime. That’s why we focus on availability, correct fitment, and reliable performance.

Our advantages:

• OEM-equivalent and aftermarket options

• Competitive South African pricing

• Technical support for part matching

• Nationwide supply

• Solutions for rebuilds, repairs, and replacements

Installation & Maintenance Tips

Installation Tips

• Always inspect the swing motor before reuse

• Flush hydraulic lines to remove contaminants

• Torque mounting bolts to Komatsu specifications

• Align the swing pinion correctly with the slew ring

• Use recommended gearbox oil

Maintenance Tips

• Regularly check oil levels and condition

• Listen for abnormal noise during rotation

• Inspect seals for leaks

• Maintain correct hydraulic pressure

• Schedule periodic swing drive inspections

Frequently Asked Questions (FAQ)

1. What is the difference between a swing drive with motor and without motor?

A swing drive with motor includes the hydraulic motor, while a swing drive without motor is only the gearbox. The motor-less option is more cost-effective if your swing motor is still usable.

2. Can I reuse my existing Komatsu swing motor?

Yes. If the motor is in good condition and compatible, it can be reused with a new swing drive gearbox.

3. Are your Komatsu swing drives OEM or aftermarket?

TOSOG supplies OEM-equivalent and aftermarket swing drives, depending on availability and customer preference.

4. How do I confirm compatibility?

Provide:

• Excavator model

• Serial number

• Existing swing drive part number (if available)

Our team will confirm the correct unit.

5. Do you supply used or refurbished swing drives?

Yes. Subject to availability, we supply new, unused stock, refurbished, and good-condition used units.