Description
Massive tractive effort on the Caterpillar 330B heavy crawler excavator is generated by an integrated track final drive combining a high-pressure axial piston travel motor with a heavy planetary reduction gearbox. Tatan Machinery supplies 100% Brand New complete final drive travel motor assemblies (OEM part numbers: 107-7032 / 107-7033, interchangeable with 145-6364 / 114-1237). Pre-assembled with an internal multi-disc wet parking brake pack, counterbalance motion control valve, and heavy-duty duo-cone mechanical floating face seals, each unit is dynamically bench-tested and backed by our 12-Month Comprehensive Replacement Warranty.
Source Verification: First-Party Physical Stockholding
We are a specialized stocking supplier of excavator hydraulic components. We do not dropship unverified goods. All hydraulic pumps, control valves, and final drives supplied on our site are 100% Brand New (our diesel engine assemblies are remanufactured to OEM tolerances).
| Supplying Entity: | Tatan Machinery (Excavator Component Exporter) |
| Component Classification: | Final Drive Travel Motor / Undercarriage Parts |
| Component Structure: | Complete Track Drive Unit (2-Speed Piston Motor + Planetary Reduction Gearbox) |
| OEM Master Assembly Code: | 107-7032 / 107-7033 (Cross Ref: 145-6364, 114-1237, 107-7030) |
| Manufacturing Standard: | 100% Factory Brand New (Unused, Full Bench Pressure & Torque Certified) |
| Target Machine Brand: | Caterpillar Excavator Parts Collection |
📦 Heavy Final Drive Inventory & Staging Verification
Physical inventory storage, planetary gearbox assembly inspection, and export testing facility:
Physical inventory verified — ready for global crating. Video inspection calls and warehouse visits welcome.
Track Drive Mechanical & Hydraulic Specifications
| Engineering Property | Design Metric |
|---|---|
| Travel Motor Design | Two-Speed Variable Displacement Axial Piston Motor with Automatic Downshift |
| Planetary Gearbox Staging | Heavy-Duty Multi-Stage Planetary Reduction Gear Mechanism |
| Maximum Working Pressure | 31.4 MPa (314 bar / 4,554 PSI) / Peak Surge: 34.3 MPa |
| Maximum Tractive Output Torque | Approx. 72,000 N·m High-Torque Drawbar Effort |
| Mechanical Parking Brake | Hydraulically Released, Spring-Applied Wet Multi-Disc Friction Brake |
| Gearbox Lubricant Volume | Approx. 8.0 Liters SAE 80W-90 / 85W-140 Heavy Gear Oil |
| Total Assembly Weight | Approx. 325 kg (716 lbs) Complete Drive with Planetary Gearbox |
| Standard Machine Match | Caterpillar 330B / 330B L Heavy Hydraulic Excavators |
Field Diagnostics: Root Causes of CAT 330B Final Drive Failure
Operating a 32-ton crawler excavator in quarry rock pits and sticky clay puts massive torsional strain on track drives. When tracking fails, field repairs usually result in repeated catastrophic breakdowns:
- Planetary Sun Gear Stripping under Heavy Track Tension: Over-tightening track chains causes immense side-load forces. Under hard counter-rotation on granite rocks, the primary sun gear teeth shear off, jamming planetary pinions and locking the track hub solid.
- Duo-Cone Floating Face Seal Erosion & Oil Starvation: Heavy abrasive mud packing between the drive sprocket and motor housing cuts the floating face seal O-rings. The 8 liters of gear oil drain out unnoticed, welding planet gears and needle bearings into a solid block of melted steel within hours.
- Two-Speed Shift Spool Jamming: Contaminated hydraulic fluid jamming the internal shift piston on the travel motor head. The machine refuses to downshift into high-torque low gear, causing the excavator to stall when attempting to climb transport trailers.
- Motor Barrel Slippage & Single-Track Pulling: Scoring across the motor valve plate dumping high-pressure fluid into the case-drain line. The excavator continuously veers toward the weak track side when travel levers are pushed full forward.
Factory Dyno Testing & 12-Month Component Warranty
To guarantee immediate reliability on your worksite, every 107-7032 final drive is tested on our automated hydraulic test bench under full working parameters before export approval:
- Planetary Gear Mesh & Backlash Check: Precise dial measurement of tooth clearance across 1st and 2nd stage planetary gear clusters to eliminate gear whine and premature tooth pitting.
- Two-Speed Shift Hydraulic Pressure Verification: Actuating the dual-displacement motor swashplate from high-speed (small angle) to high-torque (large angle) to guarantee instant downshift response under full relief pressure.
- Counterbalance Valve Anti-Runaway Hold Test: Testing the dynamic brake valve spool to ensure the track will not over-speed or free-wheel when tracking downhill.
- Duo-Cone Floating Seal Air Hold Test: 1.5 bar pneumatic air decay test on the planetary hub cavity to certify 100% seal integrity before gear oil filling.
- Track Frame Pilot & Sprocket PCD Accuracy Check: CMM coordinate check on track frame mounting bolt patterns and sprocket bolt holes to guarantee 100% bolt-on alignment.
📹 Workshop Final Drive Dyno Testing Live Clip
Watch our technician inspect track motor shift pressure, hub rotation, and port caps:
✓ Live unit filmed on hydraulic test stand at Tatan Machinery facility
Export Packing & Logistics Dispatch
A heavy 325 kg final drive requires reinforced industrial packaging to survive ocean transit without shift or moisture penetration:
- Threaded Metal Port Plugs: Main travel ports, case drain line, and 2-speed shift signal ports sealed with heavy-duty metal blanking caps.
- Marine Anti-Rust Wax: External bare hub surfaces, sprocket mounting faces, and bolt threads coated with heavy marine anti-rust wax.
- Solid Structural Base Mounting: The drive unit is bolted down upright to high-density solid wood base skids to prevent tipping during transit.
- ISPM 15 Fumigation-Free Solid Plywood Box: Fully enclosed export crate banded with multiple high-tensile galvanized steel straps.
Sealed steel port caps, protective anti-corrosion wax, and reinforced wooden crating
Field Commissioning Rules: Protect Your New Final Drive
Planetary gears and travel motors operate under extreme torque. You MUST perform these steps during assembly:
- MANDATORY: Fill Planetary Gearbox Oil Before Tracking: Final drives are shipped dry or with minimal testing lubricant. Rotate the hub until one plug is at 12 o’clock (fill) and one is at 3 o’clock (level). Fill with clean SAE 80W-90 or 85W-140 gear oil (~8.0L) until oil weeps from the level plug! Tracking with dry gears will destroy the planetary train in 50 meters!
- Pre-Fill Motor Casing with Clean Hydraulic Oil: Disconnect the case-drain line and pour clean hydraulic oil into the motor housing before connecting the hose. Dry-starting the hydraulic motor will instantly burn out the slipper shoes.
- Sprocket Bolt Torque & Threadlocker: Clean the track drive sprocket mating face. Apply Loctite 271 high-strength threadlocker to all sprocket bolts and torque strictly to Cat factory torque specs in a criss-cross pattern.
- Verify Case-Drain Line Pressure: Ensure the case-drain line back to the swivel joint and hydraulic tank is completely unobstructed. Any backpressure over 0.3 MPa will blow out the motor main shaft seal into the planetary gearbox!
- Low-Speed Track Air Bleeding: Elevate the track using the boom. Run the track in forward and reverse at low idle for 5 minutes without load to purge all trapped air from the hydraulic lines.
Procurement Decision FAQ: What Buyers Ask
Q: Is this 107-7032 drive a complete unit with the planetary gearbox, or only the hydraulic motor?
A: This is a complete, fully assembled drop-in final drive. It includes the complete hydraulic two-speed axial piston motor, the multi-stage planetary reduction gearbox, the mechanical parking brake pack, and the counterbalance motion control valve. It is ready to bolt directly onto your CAT 330B track frame.
Q: Are your final drives brand new or rebuilt? What is your warranty coverage?
A: This final drive assembly is 100% Brand New with zero operating hours, backed by our 12-Month Comprehensive Replacement Warranty. All gears, planetary carriers, bearings, floating seals, and hydraulic motor components are brand new. (Please note: On our site, all hydraulic pumps, valves, and travel motors are 100% Brand New; only diesel engines are remanufactured).
Q: My CAT 330B has part number 145-6364 or 114-1237. How do you confirm fitment?
A: 107-7032, 145-6364, and 114-1237 are directly interchangeable Caterpillar OEM part numbers used across 330B and 330B L production batches (prefixes 3YS, 4RS, 5LS). Send your machine’s 17-digit PIN number from the cab tag and clear photos of your current travel motor nameplate to Gavin. We verify the exact bolt hole pattern and sprocket diameter in the official Caterpillar parts database within 10 minutes.
Q: Can I see live photos and stamped serial numbers of the actual final drive before dispatch?
A: Absolutely yes. Prior to balance payment and dispatch, we send clear photos and live video of the exact unit assigned to your order. You will see the stamped serial tag, sprocket bolt hole circle, sealed steel port plates, and the wooden box packaging process.
Q: What happens if the crate is damaged during sea freight, and what customs documentation is supplied?
A: Every shipment from Tatan Machinery is protected by full commercial marine cargo insurance. The heavy drive is bolted down directly onto internal skids within a fumigation-free solid plywood crate. We supply commercial invoices with accurate HS Codes (8483.40 / 8412.29), detailed packing lists, and Certificates of Origin for smooth customs clearance at your destination port.
🔗 Frequently Purchased Together with CAT 330B Final Drive:
- DIESEL ENGINE:
Caterpillar 330B 3306TA Diesel Engine Assembly (116-6725)
Remanufactured - MAIN VALVE:
Main Control Valve Assembly (116-6729) for Caterpillar 330B
100% Brand New - HYDRAULIC PUMP:
SBS120 / AP-14 Main Hydraulic Pump (123-2229) for Caterpillar 330B
100% Brand New - SWING MOTOR:
M5X180 Swing Motor Assembly (145-6380) for Caterpillar 330B
100% Brand New - BRAND CATALOG:
View All Caterpillar Excavator & Heavy Equipment Parts Collection
Get Wholesale Factory Quote for CAT 330B Final Drive 107-7032
Looking for direct factory pricing, stock availability, or 12-month warranty terms for Cat 330B travel drives? Contact senior specialist Gavin now!
💡 Fast Quote: Send your machine serial number or current travel motor photos for an accurate match within 10 minutes!
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote based on freight destination and configuration.
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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