Description
21M-27-00060 Travel Motor Assembly by Tatan Overview
The 21M-27-00060 Travel Motor assembly manufactured by Tatan is an extreme-duty integrated hydraulic undercarriage drive unit combining a dual-speed variable displacement axial piston motor and a 3-stage planetary reduction gearbox. Belongs to our Travel Motor Final Drive Assembly classification. Engineered specifically for Komatsu PC650-8, PC650LC-8, and PC600-8 70-ton mining excavators, replacing your worn travel drive with a Tatan complete assembly eliminates track steering deviation, restores massive 415 kN climbing tractive drawbar pull, and cures planetary gear grinding across demanding quarry and open-pit mining applications.
Operating under direct high-volume pressure flow from the excavator’s main hydraulic pump and directed via the PC650-8 main control valve, every genuine 21M-27-00060 Travel Motor incorporates 20CrNiMo carburized planetary gears, Duo-Cone mechanical face seals, a hydraulic parking brake pack, and a built-in counterbalance valve, ensuring 100% direct bolt-on installation with track frames, drive sprockets, and chassis hydraulic hard lines.
Key Attributes & Technical Parameters for 21M-27-00060 Travel Motor
| Product Category | Travel Motor Final Drive Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Komatsu 706-88 Heavy 3-Stage Final Drive | Brand Name | Tatan |
| Compatible Equipment | Komatsu PC650-8 | PC650LC-8 | PC600-8 | OEM Part Number | 21M-27-00060 / 21M-27-00050 |
| Matched Engine Series | Komatsu SAA6D140E-5 Diesel Engine (323 kW) | Place of Origin | Guangdong, China |
| Max Relief Pressure | 34.3 – 37.3 MPa (343 – 373 bar) | Pilot Control Pressure | 3.9 MPa (39 bar Shift Pressure) |
| Spool Precision Spec | Micro-Lapped < 0.003 mm Clearance | Quality Status | 100% Brand New Motor & Gearbox |
| Machinery Test Report | Provided (100% Bench Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Gear Oil Spec | SAE 80W-90 / SAE 85W-140 EP | Packaging | Export Wooden Box Packaging |
Supported Excavator Machinery Brands & Final Drive Coverage
In addition to Komatsu, Tatan manufactures replacement travel motors, planetary gearboxes, and track drive parts for major excavator brands:
70-Ton Heavy Mining Undercarriage Powertrain & 3-Stage Final Drive Standards
Delivering up to 415 kN of tractive drawbar pull on 65~70 ton heavy crawler excavators requires specialized metallurgical hardening and an ultra-high reduction ratio. Every genuine 21M-27-00060 Travel Motor unit supplied by Tatan is built with 3-stage carburized 20CrNiMo planetary gears and heavy-duty mechanical face seals across global mining fleets:
🚜 415 kN Tractive Drawbar Pull
Dual-speed variable swashplates deliver instantaneous maximum displacement on 35-degree quarry climbing grades.
⚙️ 3-Stage Carburized Gearing
Case-hardened 20CrNiMo sun and planetary gears resist sudden impact tooth shearing under track chain stalling loads.
🛡️ Zero Slurry Ingress
Heavy-alloy Duo-Cone floating seal packs lock out abrasive sand, slurry, and demolition wires, protecting the 18L gear oil reservoir.
Application Scenarios & Buyer Value
When upgrading or replacing your 70-ton excavator undercarriage drive with our 21M-27-00060 Travel Motor, buyers achieve maximum operational uptime and flow control:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Komatsu PC650-8 Drive Replacement | 1:1 direct bolt-on installation eliminates track wandering on muddy terrain and restores full 5.5 km/h high-gear travel speed. |
| Hydraulic Overhaul Workshops | Avoids the complex labor of pressing heavy planetary gear carriers and setting preload shims; drops on as a sealed unit. |
| Mining & Quarry Fleet Operations | Reinforced carburized gears and heavy Duo-Cone seals withstand rock debris abrasion and continuous 37.3 MPa track stall loads. |
| Heavy Equipment Parts Stockists | Fast-moving, high-demand 70-ton final drive inventory ready for immediate shipment to minimize customer downtime. |
21M-27-00060 Travel Motor OEM Diagnostic & Troubleshooting Guide
Use this OEM manual hydraulic diagnostic guide to troubleshoot travel motor and gearbox symptoms on your Komatsu PC650-8 excavator:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Machine tracks to one side (单边跑偏) during straight travel | Travel motor valve plate scoring causing excessive case-drain bypass, or counterbalance spool sticking partially closed on weak side under high flow. | Replace with Tatan 21M-27-00060 complete final drive assembly or flush counterbalance valve passages. |
| 2. Motor fails to shift between Low (Tortoise) and High (Hare) speed | Two-speed shift pilot spool jammed by dirty oil, or swashplate minimum angle control piston seals degraded under 323 kW pump surges. | Inspect 3.9 MPa shift pilot pressure at motor port, clean 2-speed selector valve, or replace travel drive unit. |
| 3. Black gear oil leaking from sprocket hub into track links | Duo-Cone mechanical face floating seal rings worn out or wire/packing rope wrapped around sprocket cutting O-rings. | Stop machine immediately to prevent planetary gear seizure; install fresh Tatan factory-sealed final drive. |
| 4. Loud grinding & clunking sound from track drive hub | 3-stage planetary sun gear tooth fracture or needle roller bearing failure caused by operating with low gear oil level under 415 kN drawbar loads. | Drain gear oil to check for metal debris; replace complete gearbox assembly to prevent main frame lockup. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan 21M-27-00060 Travel Motor shipment undergoes anti-rust oiling, waterproof plastic sealing, and solid export wooden box packaging:
21M-27-00060 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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