Travel motor 280-3097 final drive for Caterpillar 303.5C 303.5D 303.5E 303C CR 303E CR 304D CR 304E mini excavator
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OEM Final Drive Travel Motor for CAT 303.5C/D/E & 304D/E Series | Part No. 280-3show contacts
1. Product Overview
The 280-3097 and 291-9390 are heavy-duty integrated drive units consisting of a variable displacement axial piston motor and a multi-stage planetary reduction gearbox. These units are engineered to deliver the precise tracking power and high breakout torque required for CAT’s "Compact Radius" (CR) and standard mini excavators. With 13 years of specialized experience in hydraulic transmissions, we ensure these drives meet the strict performance curves necessary for synchronized tracking and effortless climbing.
2. Technical Specifications & Parameters
Caterpillar Part Numbers: 280-3097, 291-9390, 2803097, 2919390.
Machine Compatibility: * 303 Series: 303C CR, 303E CR.
303.5 Series: 303.5C, 303.5D, 303.5E.
304 Series: 304D CR, 304E.
Motor Type: Two-speed hydraulic piston motor (High/Low speed switching).
Gearbox Type: Multi-stage planetary reduction with hardened gear steel.
Sealing: Premium "floating" mechanical face seals designed for extreme mud, water, and debris protection.
Mounting: Direct OEM-spec bolt pattern for sprocket and frame mounting (ensure to verify hole count upon inquiry).
3. Why Partner With a 13-Year Industry Expert?
Verified Compatibility: We understand the subtle differences between the C, D, and E series undercarriages. We verify your machine serial number to ensure the motor displacement matches your hydraulic pump output perfectly.
Quality Bench Testing: Every final drive undergoes a full-load torque test and high-pressure leak check to ensure "out-of-the-box" reliability.
Optimized Supply Chain: Access Original New or Premium OEM-spec units at factory-direct pricing, bypassing significant local dealership markups.
Global Rapid Logistics: Units are secured in reinforced, vibration-dampening export crates. Rapid delivery via DHL, FedEx, or UPS typically arrives in 3 to 7 business days.
4. Critical Installation & Maintenance Protocol
Gear Oil Commissioning (Mandatory): The planetary gearbox is often shipped with minimal oil for transit safety. You must fill it with high-quality gear oil (typically SAE 80W-90) to the correct level before operation.
Case Drain Integrity: Verify that the case drain line is free of obstructions. High backpressure in the motor case is the leading cause of shaft seal failure and internal motor damage.
System Cleanliness: Inspect all hydraulic lines for metal shavings from the previous failed unit. Contamination will significantly shorten the lifespan of the new piston motor.
Air Bleeding: After installation, lift the track off the ground and run the motor at low speed in both directions to bleed air from the hydraulic circuit before applying a full load.
5. Ordering & Professional Support
Fitment Verification: Please provide your machine Serial Number (e.g., Prefix RBR, DMY, or E3Y) and the number of sprocket mounting holes to ensure 100% fitment accuracy.
Instant Quote: Contact us today for current pricing, availability, and tiered quality options.
Technical Guidance: Our expert team is available 24/7 to assist with installation procedures, hydraulic pressure settings, and troubleshooting.