0781144UA Final Drive Travel Motor Gearbox for IHI Imer 40NX 45NX 45NX-2 Mini Excavator

Heavy 230mm Sprocket Fitment & Dual 9-Bolt M14 Pattern for 4.0–5.0T IHI Earthmovers. OEM-spec replacement dual-displacement hydraulic travel motor complete with integrated planetary reduction gearbox, engineered specifically for IHI and Imer 40NX, 45NX, and 45NX-2 mini excavators.

(Authority verified via IHI/Imer EPC parts catalogs & compact hydraulic databases)

(Precision measurements verified for IHI 4.5-ton reinforced track frames)

Is your 4.5-ton IHI losing climbing traction on trench ramps, or pulling to one side under full blade push? The IHI 45NX platform generates substantial tractive effort across its 230 mm drive sprocket interface. Continuous heavy excavation in rocky ground subjects the 9-hole M14 mounting pattern to intense cyclic reversing loads. Over high operating hours, internal bearing end-play loosens, allowing planetary gears to mesh out of alignment and grinding tooth flanks. Concurrently, internal pressure bleed across the two-speed displacement changeover spool starves rotating piston shoes, dropping low-gear breakout force. Installing our precision-machined 0781144UA final drive ensures 100% concentric 180 mm / 230 mm alignment, solid M14 clamping security, and full hydraulic climbing traction.

Q: Will this final drive bolt directly onto my IHI 45NX-2 without altering the drive sprocket? A: Yes. It matches factory OEM part number 0781144UA directly. The 180 mm chassis register (9xM14) and 230 mm sprocket pilot (9xM14) align seamlessly with your existing factory IHI undercarriage.

Q: What is the mandatory startup lubrication protocol before running this replacement drive? A: Pre-fill the hydraulic motor casing with fresh ISO VG 46 fluid through the upper casing drain plug. Separately, fill the planetary reduction gearbox with SAE 80W-90 extreme-pressure gear lubricant up to the horizontal oil level check plug before starting the engine.

Q: How does 0781144UA cross-reference with 0781298UA across IHI 40NX and 45NX models? A: 0781144UA and 0781298UA are direct factory engineering supersessions for the IHI 40NX, 45NX, and 45NX-2 undercarriages, sharing identical 230 mm sprocket registers, 180 mm frame registers, and dual 9-hole M14 fastener patterns for single-SKU inventory consolidation.

Q: What is the export packaging standard for overseas freight? A: Each drive unit is internally treated with rust-inhibiting transit fluid, sealed inside heavy-gauge vapor corrosion inhibitor (VCI) poly barrier wrap, and bolted securely inside an ISPM-15 certified fumigated export wooden crate built for container and air cargo handling.