Revised Concise Version For 337035028 Milling Drum Reduction Gear

337035028 is a two-stage planetary milling drum reduction gearbox, a direct OEM interchange replacement for BOMAG BM1000 / BM1200 / BM1300 cold asphalt milling machines. Multiple configurable options are supported, including OEM-matched mounting flanges, standard original oil port specifications, heavy-duty anti-impact oil seals and integrated wet multi-disc brake structures. Equipped with carburized fully-ground hard-tooth planetary gear sets, heavy-load reinforced roller bearings and multi-layer pressure-resistant sealing assemblies, this reducer maintains steady high-torque output under continuous high-intensity road milling, deep cutting loads and frequent instantaneous pressure surges on construction job sites. Fully interchangeable with genuine BOMAG OEM gearbox units; all overall external dimensions, hydraulic port layouts, mounting flange profiles and input/output splines achieve precise 1:1 matching for plug-and-play replacement, with no cutting, secondary machining or hydraulic pipe modification needed during installation.

The 337035028 planetary reduction gearbox is a high-torque integrated cutter drum drive assembly engineered for heavy-duty asphalt cold milling equipment, delivering powerful rotary drive force for the cutting rotor of BOMAG BM series road planers. It runs at a rated working pressure of 240 bar, with a maximum intermittent peak pressure of 300 bar, maintaining stable performance through long-duration full-load milling construction cycles. Widely applied in highway asphalt removal, pavement renovation and municipal road reconstruction projects, it features superior shock resistance and prolonged service lifespan under persistent cutting impact and heavy static torque loads. As the core drive component for milling cutter drums, it adopts a high-strength ductile cast iron housing, thickened reinforced output bearing group and spring-actuated hydraulic release wet multi-disc holding brake, able to withstand frequent hydraulic pressure fluctuations to adapt to rugged dusty, gravelly and high-vibration road construction environments.

This planetary reduction unit supports comprehensive customized upgrade options: optimized high-strength gear tooth profiles, heavy-duty full sealing repair kits, customized speed ratio configurations and reinforced high-load output splines, fully compatible with the original hydraulic motor drive system of BOMAG BM1000/BM1200/BM1300 cold milling machines. Custom modified variants eliminate redundant transition adapters, achieving seamless direct connection with the milling rotor via accurate spline and oil port alignment. It acts as the optimal high-torque cutter drive solution for cold planers with limited drum-side installation space and modular hydrostatic drive systems, widely deployed across highway, municipal and transportation infrastructure engineering projects.

Q: What machine does the 337035028 reduction gear fit?

A: 337035028 is an OEM milling drum planetary reduction gearbox exclusively designed for BOMAG BM1000, BM1200 and BM1300 cold milling machines, acting as the core drive assembly for the milling cutter drum.

Q: Is it a direct OEM replacement?

A: Yes. All mounting flanges, bolt holes, input/output splines, oil port positions and overall dimensions are 1:1 OEM matched. No cutting, drilling or modification is required, supporting direct plug-and-play installation.

Q: What are the key pressure and torque parameters?

A: Rated working pressure: 240 bar; peak intermittent pressure: 300 bar; maximum output torque: 230000 N·m. Adopts two-stage planetary transmission structure, suitable for heavy-duty asphalt milling and hard concrete cutting operations.

Q: Does it match the original machine hydraulic system?

A: Fully compatible. It perfectly matches the original hydraulic motor drive system of BOMAG BM series cold planers, ensuring stable power output and consistent milling performance without extra adapters.

Q: Does it include a built-in brake system?

A: Yes. It is integrated with a spring-applied, hydraulic-release wet multi-disc brake, providing reliable emergency stop and load holding functions during milling operation and equipment shutdown.

Q: Are custom options available?

A: Yes. We support customized upgrade solutions, including reinforced hard-tooth gear sets, heavy-duty full seal kits, optional reduction ratios and strengthened load-bearing structures for severe high-impact milling conditions.

Q: What hydraulic oil and maintenance cycle is recommended?

A: Use ISO VG320 heavy-duty industrial gear oil. Regular oil inspection every 500 working hours; complete oil replacement and full seal inspection every 2000 working hours to guarantee transmission efficiency.

Q: How to fix common leakage and overheating issues?

A: For minor oil leakage, retighten mounting bolts evenly. For persistent leakage, replace the full set of professional sealing kits. Overheating is mainly caused by deteriorated gear oil, insufficient oil volume or internal gear wear. Timely oil replacement and routine inspection are recommended. Unauthorized disassembly is prohibited.

Q: What is the warranty policy?

A: We provide a 12-month factory warranty. Free technical support and faulty part replacement are available for non-artificial damage under standard installation and operating conditions.