0753788UA Final Drive for IHI 55J 55J-2 Mini Excavator | Travel Motor Gearbox

Heavy 230mm Sprocket Fitment & 75mm Pilot Depth for 5.0–6.0T IHI Earthmovers. OEM-spec replacement dual-displacement (Snellgange 2-Speed) hydraulic travel motor complete with integrated planetary reduction gearbox, engineered specifically for IHI and Imer 55J and 55J-2 mini excavators.

1. Technical Operating Specifications

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

2. Complete Undercarriage Blueprint & Mounting Dimensions

(Direct engineering measurements from IHI 55J blueprint for 5-6 ton track frames)

3. Resolving IHI 55J Pilot Runout & Two-Speed Shift Failure

Is your 5.5-ton IHI machine losing climbing traction on spoil piles, or shuddering when attempting two-speed shift? On IHI 55J excavators, continuous cyclic grading exerts extreme radial leverage across the 230 mm sprocket pilot spigot (ØD). Operating with worn internal bearings widens end-play, causing primary sun gears to mesh out of alignment and grinding tooth flanks. Concurrently, oil contamination inside the two-speed pilot changeover block (Snellgange) prevents smooth displacement shifting, leaving the track stuck in high gear and sapping low-speed tractive rim pull. Installing our precision-machined 0753788UA final drive ensures 100% concentric 230 mm sprocket alignment, eliminates gear lash, and delivers smooth, synchronized dual-speed tracking.

4. Frequently Asked Questions (Technical & Commercial)

For Machine Owners & Operators (C-End Insights)

Q: Will this final drive bolt directly onto my IHI 55J-2 whether my sprocket uses 9 or 12 bolt holes? A: Yes. The drive hub is engineered to accommodate standard 9-hole and reinforced 12-hole M14 sprocket patterns matching PCD 262 mm (ØE) and pilot 230 mm (ØD), with a 180 mm frame pilot (ØC) and 75 mm step depth (A) for a direct bolt-on installation.

Q: What is the mandatory startup lubrication procedure 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 gearbox with SAE 80W-90 extreme-pressure gear lubricant up to the horizontal oil level check plug before starting the engine.

For Equipment Dealers & Repair Facilities (B-End Insights)

Q: Can part number 0753788UA be stocked for both IHI 55J and 55J-2 excavators? A: Yes. 0753788UA is the standard factory final drive assembly specified across the IHI 55J, 55J-2, and 55NX family, sharing identical 230 mm sprocket registers, 75 mm pilot depths, and 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.