557-5905 557-5904 610-8800 Travel Motor Final Drive 538-5902 for CAT E345GC 336GC 345GC E340

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Heavy-duty hydraulic final drive travel motor assembly engineered for CAT 336GC, 345GC, E345GC, and 340 series crawler excavators. Replaces OEM part numbers 557-5905, 557-5904, 538-5902, and travel gearbox 610-8800, delivering high torque output and reliable tractive effort across rough mining and quarry terrains.

Engineered to 1:1 OEM installation specifications. Direct drop-in fit for track undercarriage frames; perfectly matches drive sprocket bolt hole patterns, track roller clearance, and main hydraulic travel control piping.

Available in two flexible supply configurations: complete travel device assembly (including two-speed axial piston hydraulic motor, brake valve group, and reduction gearbox) or standalone planetary reduction gearbox (matching part number 610-8800).

Forged high-strength alloy steel housing with precision-machined multi-stage planetary gears. Case-hardened gear teeth deliver exceptional wear resistance, smooth tooth meshing, and high shock-load tolerance against sudden track stalling.

Each final drive undergoes rigorous hydraulic bench testing prior to packaging. Verified for dual-speed displacement switching, parking brake holding torque, relief valve sealing, and internal gear oil retention to ensure zero on-site leakage.

Factory direct wholesale supply designed for heavy equipment repair shops, undercarriage overhaul specialists, and international construction machinery spare parts distributors. Shipped secured in heavy-duty export-grade wooden crates with port-seal plugs and anti-rust protection.