CAT 336D / 330D Swing Drive Gearbox – Specification (114-0661)

Description

Product Video

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-engineered swing drive gearbox – OEM part number 114-0661 (also referenced as 1140661 / DRIVE GP-SWING). Manufactured to Caterpillar‘s original equipment specifications for CAT 336D, 330D, and compatible 30–36 ton class excavators. This is a brand‑new, factory‑spec unit – not remanufactured, not a generic substitute.

• Critical component for 360° upper structure rotation – The swing drive is the power transmission component that allows the excavator to rotate on its base. It converts hydraulic power from the swing motor into the high torque needed to swing the upper structure, enabling the machine to dig and move material from different angles. When this gearbox fails, the machine cannot position itself for efficient digging.

• Direct replacement for CAT 336D / 330D series – Specifically engineered for Caterpillar 336D, 336D L, 330D, 330D L, and related 30–36 ton class excavators. Mounting flange, shaft interface, and bolt patterns match the original Caterpillar specifications exactly – no modifications, no adapters.

• Two‑stage planetary reduction design – The swing drive consists of a series of planetary gears that reduce the rotational speed of the swing motor. The first stage reduction components include first stage sun gear, first stage planetary gears, ring gear, and first stage planetary carrier. The second stage reduction components include second stage sun gear, second stage planetary gear, ring gear, and second stage planetary carrier. This compact planetary design delivers smooth, consistent torque transfer with minimal backlash.

• High torque output for 30–36 ton class work – The swing drive provides the torque and gear reduction necessary for smooth, powerful rotation of the upper structure. The CAT 336D delivers a swing torque of 108.6 kN·m (≈80,142 lb·ft) and a swing speed of 8.98–10 r/min. The swing drive oil capacity is 19 L (5 gal US).

• Output pinion shaft engages with swing bearing – The teeth of the swing drive output pinion shaft engage with the bearing gear of the swing bearing, which is attached to the lower structure. As the pinion shaft rotates, it moves around the bearing gear, causing the upper structure to swing.

• Robust construction for extreme conditions – Built with high-strength materials and precision-machined components to withstand the extreme shock loads, vibration, and torsional stress generated during swing operations. Premium seals prevent contamination ingress and oil leakage, extending service life.

• Factory-sealed and lubricated – The swing drive is sealed and filled with the correct lubricant. Capacity is 19 L (5 gal US). Premium seals prevent contamination ingress and oil leakage.

• 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 genuine CAT 114-0661 swing drive gearbox is the power transmission component for the swing system on CAT 336D and 330D series excavators used in the most demanding job sites:

• Large‑scale construction & infrastructure – Highway excavation, dam building, bridge footings, and large‑scale earthmoving projects. The swing drive‘s high torque output (108.6 kN·m) and smooth rotation enable precise positioning of the upper structure for efficient loading and digging cycles.

• Quarrying & aggregates – Loading trucks, stockpile management, and material handling in granite, limestone, and basalt quarries. The swing drive’s robust construction and sealed design withstand abrasive dust conditions, while the planetary reduction provides consistent torque for precise bucket control.

• Mining support – Site cleanup, road maintenance, drainage works, and equipment pad grading. A genuine new swing drive provides predictable service life – avoiding costly unplanned downtime in remote mine sites.

• Demolition & scrap processing – Shock loads, vibration, and sharp debris are routine in demolition yards and metal recycling facilities. The swing drive‘s heavy‑duty construction and sealed bearings absorb these extreme conditions without premature wear.

• Equipment rental fleet – 30–36 ton excavators are high‑value rental assets. A genuine new swing drive eliminates the gamble of remanufactured or used units – avoiding costly mid‑rental failures, towing bills, and customer complaints. The swing drive is a high‑wear component on rental machines due to constant rotation and varying operator habits.

• Forestry & land clearing – Steep slopes, fallen timber, and uneven terrain demand reliable swing performance. The swing drive’s consistent torque delivery ensures smooth, controlled rotation 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 336D and 330D platforms inside out – the different engine variants (Cat C9 ACERT®), hydraulic systems, and production changes over the years.

• 90% of our catalog in stock – Your swing drive sits in our Guangzhou warehouse, not in a supplier’s backlog. From hydraulic components 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, 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 swing drive 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 – Genuine OEM‑spec swing drives deliver the same performance as new Cat components while priced competitively. 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.