Description
Detail Information
| Parameter | Value | Note |
|---|---|---|
| Status | Original Used Remanufactured | – |
| Warranty | 3-6 months according to product details; We do not provide warranty for original and used products. | – |
| Minimum Order Quantity | 1 piece | – |
| Monthly Output | 300 pieces/month | – |
| Packaging Details | Wooden case packaging or customized | – |
| Payment Terms | L/C, T/T, XT, PayPal, Western Union | – |
| Delivery Time | 5-8 working days (depending on order situation) | – |
| Shipping Method | Sea freight, air freight or via DHL/FEDEX/TNT/EMS | – |
| Guarantee Measures | We inspect the product and send detailed pictures to buyer for confirmation. | – |
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.
The final drive travel motor is the component that converts hydraulic power into the torque needed to drive your excavator’s tracks. When this unit fails, a 30-tonne EX300-3 becomes completely immobile — an obstruction that requires expensive recovery equipment just to get it to a repair location. A properly remanufactured final drive restores your EX300-3 to full productivity at a fraction of the cost of a new OEM unit, turning a multi-day immobilization into a one-day repair.
1. Key Features & Benefits
Complete travel motor assembly – An integrated unit that combines a high-torque axial piston hydraulic motor with a multi-stage planetary gearbox and a spring-applied parking brake, all in a single housing for direct bolt-on replacement. The HMGF49 series is the standard travel motor for Hitachi’s 30-tonne class excavators, including the EX300-3, EX300-3C, and EX310H-3C.
High load-bearing capacity for 30-tonne class – Engineered to handle the full operating weight of a Hitachi EX300-3 (approximately 29,400 kg / 64,800 lb), providing the tractive force needed for demanding digging, steep slope climbing, and pushing through heavy material.
Two-speed travel capability – Factory-spec two-speed shifting allows the operator to select high-speed travel for moving around the job site or low-speed, high-torque crawling for tough digging and climbing operations. The motor responds instantly to operator commands, maintaining the machine’s original responsiveness and cycle efficiency.
HMGF series design with high operating pressure – The HMGF series operates at up to 350 bar (5,076 psi) continuous pressure, with peak handling up to 400 bar (5,800 psi), ensuring consistent travel force under extreme digging loads and steep slope conditions.
Axial piston design with high volumetric efficiency – Features an inclined cylinder block axial piston design that delivers high volumetric efficiency, low internal leakage, and reliable performance under continuous heavy loads. This piston-type design is the industry standard for crawler excavator travel motors.
Integrated spring-applied parking brake – Built-in wet multi-disc brake engages automatically when travel controls return to neutral, holding the machine securely on slopes. The brake releases instantly when a travel command is given, ensuring immediate response without drift. The integrated holding brake prevents unintended machine movement without requiring external components.
Compatible with multiple model variants – Directly replaces OEM part numbers 9135325 and 9135612. Fits EX300-3, EX300-3C, EX310H-3C, and is cross-compatible with HMGF49AA and HMGF57LA variants. Always verify fitment with your machine serial number before ordering.
Dyno-tested and ready to install – Each unit is fully disassembled, cleaned, crack-inspected using dye penetrant testing on critical castings, rebuilt with new bearings, seals, and O-rings, then run on a hydraulic test stand to verify operating pressure (up to 350 bar), smooth gear engagement, and no internal leakage before being released for shipment.
Pre-shipment visual verification – Detailed high-resolution photographs are sent to you for approval before packing. You see the actual unit you are receiving — mounting flange, splines, port threads, and general condition — and approve shipment. No blind shipments, no surprises.
Fast delivery – 5–8 working days lead time from our Guangzhou warehouse, with monthly supply capacity of 300 units.
2. Applications
The Hitachi EX300-3 with the HMGF49 series final drive travel motor is a 30-tonne workhorse proven across decades of use in heavy industries where reliable track mobility is non-negotiable.
Mining & quarry operations – EX300-3 excavators are used in open-pit mines, aggregate quarries, and material handling operations where abrasive dust, extreme shock loads, and long continuous shifts are the norm. The HMGF series final drive’s high-strength cast iron construction and premium duo-cone floating seals are specifically designed to keep contaminants out of the planetary gearbox — fine dust would otherwise turn gear oil into grinding paste. For mine sites with limited service support, keeping a remanufactured final drive on the shelf transforms a week-long immobilization into a one-day repair.
Heavy construction & infrastructure projects – Highway construction, dam building, bridge foundation work, and large-scale site preparation all demand that the excavator moves reliably across unimproved terrain. A final drive failure in the middle of a highway cut stops production completely — the machine cannot move itself to a repair location, and towing a 30-tonne excavator requires specialized heavy recovery equipment, adding thousands to the repair cost before a single part is replaced. A remanufactured final drive eliminates the guesswork of used components and restores OEM driveline integrity at a fraction of the cost of new.
Forestry & land clearing – Steep slopes, soft ground, fallen timber, and hidden obstacles are routine in forestry applications. The final drive’s two-speed capability allows the operator to switch between high-speed site travel and low-speed, high-torque crawling for climbing slopes or pulling through mud. The integrated spring-applied parking brake holds the machine securely on steep inclines, even with a loaded bucket.
Equipment rental fleet maintenance – Rental machines see heavier use than privately owned equipment because multiple operators with varying driving habits cycle through them. Final drives on rental EX300-3 units are high-wear components. A failure mid-rental creates costly recovery logistics, lost revenue, and damaged customer relationships. A remanufactured final drive provides a fresh start at a cost that makes proactive replacement before failure a financially sound decision.
Aftermarket drivetrain rebuilds & overhauls – When overhauling an EX300-3’s powertrain, installing a remanufactured final drive alongside new undercarriage components (sprockets, track chains, rollers) ensures that the weakest link in the track drive is eliminated. This is standard practice for fleets that want to extend machine life beyond 15,000 service hours, as a worn final drive places excessive strain on the hydraulic travel motor and the machine’s main pumps.
3. Why Choose Hongtengda Parts
At Hongtengda Parts, we have been supplying and remanufacturing undercarriage components for excavators since 2001. We know that a final drive failure is not just a parts problem — it is a production-stopping event for your business. Our approach focuses on what matters to you: reliability, transparency, and speed.
25+ years of industry experience – Founded in 2001, we have remanufactured final drives for Hitachi, Caterpillar, Komatsu, Kobelco, Hyundai, SANY, XCMG and more than fifteen other brands. We are not a middleman — we have our own remanufacturing workshop where every unit is disassembled, inspected, and rebuilt by experienced technicians. Headquartered in Guangzhou’s Zhucun parts hub — one of Asia’s major distribution hubs for construction machinery parts — we combine deep inventory, cross-brand knowledge, and reliable global shipping to keep your machines running.
90% stock availability – Hitachi EX300-3 final drive travel motor assemblies (HMGF49 series) are in stock and ready for immediate dispatch from our Guangzhou warehouse. We are not a drop-shipper or a broker — the unit you order is physically on our shelf, inspected, photographed, and ready to go. 90% of our catalog sits in our Guangzhou warehouse — not in a supplier’s backlog. From hydraulic pumps to undercarriage kits, most orders are dispatched within 24 hours on fumigated, export-ready pallets.
24-hour shipment – From our Guangzhou hub to your forwarder in 1 day. International orders are shipped within 24 hours via sea, air, or express courier (DHL, FedEx, UPS, TNT). Most customers receive their final drive within one week.
Pre-shipment visual verification – We never ship a final drive blind. Before packing, we take clear, high-resolution photographs of your actual unit, including the mounting flange, sprocket splines, port threads, and overall condition. You approve shipment — we do not ship without your confirmation.
Professional export packaging – Each final drive is packed in a heavy-duty, fumigation-free wooden case with internal foam padding and corner bracing. Your unit arrives undamaged whether shipped by air freight or in the lower deck of a container ship.
One-stop sourcing for Hitachi undercarriage parts – Beyond final drives, we supply complete undercarriage components (track chains, sprockets, track rollers, idlers, track shoes), hydraulic pumps, swing motors, control valves, engine parts, and full rebuild kits for Hitachi EX and ZX series excavators.
Technical support before you buy – Not sure if this final drive fits your specific EX300-3 variant? Send us your machine serial number and a photo of the old final drive. Our workshop team will confirm compatibility, check bolt patterns, and verify port configurations within 2 hours. Got a serial number, a model code, or just a photo of a worn-out part? Our specialists cross-reference across Hitachi, CAT, Komatsu, Sany, and 15+ brands to find what you need.
After-sales technical assistance – After you receive your final drive, our support continues. If you have questions about installation, torque specifications, case drain line routing, or brake testing, our engineers are available via email and messaging to help diagnose and resolve the issue. When downtime costs money, we move at your speed.
Send us your Hitachi EX300-3 machine serial number and a photo of the old final drive – we will confirm compatibility, provide a firm quote, and document our pre-shipment inspection for your approval within 24 hours.
Warranty note: Warranty period is 3 to 6 months depending on product details. We do not provide warranty service for original used or remanufactured parts. Our value is delivered up front: careful remanufacturing, thorough testing, and pre-shipment visual verification. For customers who require a warranty-covered option, we can quote new aftermarket units — please ask our sales team. To resolve issues fast, please send us: excavator model and nameplate photo, installation photos and video, operation video showing the fault, disassembly video and damage close-ups, and a brief description of the problem. Our three senior technicians will review your case together. If it’s a quality issue — we cover it. If not — we still guide you through the fix, but costs are yours.
Critical installation tip for the EX300-3 final drive:
The case drain line is the single most common installation point of failure. If the case drain line is blocked, kinked, or connected incorrectly, pressure will build inside the motor housing and blow the shaft seal instantly on first operation. Before starting the engine, verify that the case drain line is clear, unrestricted, and properly routed back to the tank.Also ensure the planetary gearbox side is filled with the correct gear oil (SAE 90 or 80W-90, API GL-4 or GL-5). Some EX300-3 manuals call for 30W or 40W engine oil in the planetary gearbox — check your specific model’s specifications. Do not overfill; excessive gear oil creates internal pressure that can force oil past the duo-cone floating seals. After installation, cycle the travel controls at low idle several times to bleed air from the brake release circuit — the machine may not move initially until the system is purged.
The final drive travel motor is the mechanical nerve centre of your EX300-3’s mobility. When it is healthy, you do not think about it. When it fails, nothing else matters. A remanufactured HMGF49 series unit from Hongtengda Parts gets your 30-tonne excavator back on the job — not next week, but now.
