Description
HMGF57 9119877 Travel Motor Assembly Overview
The HMGF57 9119877 Travel Motor Assembly manufactured by Tatan is an integrated hydraulic final drive unit designed for 30-ton class heavy-duty tracked mining machinery. Belongs to our Excavator Final Drive Travel Motor classification, replacing a failing drive with this complete HMGF57 9119877 Travel Motor Assembly unit eliminates straight-line travel deviation, high-pressure motor bypass, and catastrophic planetary gear failure on Hitachi EX300, EX300-2, EX300-3, and EX300LC 30-ton excavators.
Engineered strictly to original reduction gear tolerances with a total shipping weight exceeding 320 kg, this complete unit integrates heavy-duty planetary carriers, high-torque sun gears, mechanical duo-cone floating seals, and integrated counterbalance valves into a single ready-to-bolt assembly, matching original 30-ton track frame bolt patterns and drive sprockets seamlessly.
Key Attributes & Parameters for HMGF57 9119877 Travel Motor Assembly
| Product Category | Excavator Final Drive Travel Motor | Warranty | 1 Year / 12 Months |
| Specific Motor Model | HMGF57 / HMGF57AA Final Drive Motor | Brand Name | Tatan |
| Compatible Equipment | Hitachi EX300 | EX300-2 | EX300-3 Excavator | OEM Part Number | HMGF57 / 9119877 / 9144447 |
| Rated Working Pressure | 34.3 MPa (343 Bar / 4975 PSI) | Braking System | Hydraulic Release Parking Brake |
| Reduction Mechanism | Heavy-Duty Planetary Gear Reduction (320kg+) | Travel Speed Modes | Automatic High / Low Dual Speed |
| Machinery Test Report | Provided (100% Bench Torque Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Seal Configuration | Large-Diameter Floating Duo-Cone Seals | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Final Drive Unit | Packaging | Export Wooden Box Packaging |
Supported Machinery Brands & Final Drive Coverage
In addition to Hitachi, Tatan manufactures replacement complete travel motors, planetary gearboxes, and undercarriage components for leading machinery brands:
Application Scenarios & Buyer Value
When resolving track drive failures with our HMGF57 9119877 Travel Motor Assembly, workshops and equipment contractors eliminate operational downtime:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Hitachi EX300 Final Drive Replacement | Installing the HMGF57 9119877 Travel Motor Assembly restores straight tracking immediately, cutting repair downtime by 80% compared to field gear overhauls on 30-ton units. |
| Mining Equipment Service Workshops | Eliminates the high risk of catastrophic secondary planetary failure caused by reusing spalled sun gears or worn needle roller bearings under 30-ton loads. |
| Quarry & Heavy Earthmoving Fleets | Delivers reliable 34.3 MPa tractive drawbar pull without track speed degradation under deep mud, blasted rock tramming, and steep grades. |
| Global Heavy Machinery Stockists | Pre-tested, fully crated final drive inventory ready for immediate air express or ocean container dispatch to international contractors. |
HMGF57 9119877 Travel Motor Assembly OEM Diagnostic Guide
Use this technical diagnostic guide to identify final drive and tracking faults on your Hitachi EX300 excavator:
| Tracking Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Machine constantly veers to one side during forward travel | High internal oil bypass across worn valve plates and piston shoes in the weaker motor, dropping circuit pressure below 26.0 MPa. | Replace with a complete factory-tested HMGF57 9119877 Travel Motor Assembly. |
| 2. Travel motor fails to shift between low and high speeds | Two-speed pilot shift spool jammed by fluid contaminants, or hardened swashplate servo control piston seal rings. | Inspect two-speed solenoid valve signal, flush pilot hoses, or install a new pre-calibrated drive motor. |
| 3. Black gear oil leaking from the sprocket hub wheel face | Cracked mechanical duo-cone floating seal ring or abrasive rock slurry intrusion compromising internal elastomer O-ring tension. | Drain and inspect hub gear oil for metal debris, flush hub, and replace with a brand new sealed drive unit. |
| 4. Loud metallic grinding or clicking noise under tracking load | Severe spalling on the planetary gear needle bearings or fractured gear teeth on the central sun gear shaft under heavy quarry torque. | Halt operation immediately to prevent planetary carrier fracturing and swap to a new complete final drive unit. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan final drive assembly is preserved with anti-corrosion fluid, capped with steel port plugs, wrapped in heavy waterproof barrier film, and strapped inside an export-grade reinforced wooden crate.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for 3-7 day express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy 300kg+ final drive units and bulk fleet inventory orders.
📦 Export Wooden Cases
Fumigated solid wooden boxes with custom high-density foam inserts to prevent shipping shock.
Quality Control & International Certificates
Tatan hydraulic and undercarriage components are manufactured under ISO 9001 certified quality control systems and strictly comply with CE industrial safety directives.
HMGF57 9119877 Travel Motor FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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