Doosan TM40VC 604-00276C final drive for Daewoo DH220LC-5 DH220LC-7 DH225LC-7 DH225LC-9 DX225LC DX235LC DH220 DH225 DX225 excavator
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Component: Complete Final Drive Assembly (Travel Motor + Planetary Reducer)
Main Hydraulic Motor Model: Doosan / Mottrol TM40VC Series
OEM Part Numbers: 604-00276C, K1000681A, 1.401-00011, 1.404-00001
Machine Compatibility:
Daewoo Doosan Solar 220LC-5 / 220LC-7 / 220-7
Daewoo Doosan Solar 225LC-7 / 225LC-9
Doosan DX225LC / DX225LC-3 / DX225LC-5
Doosan DX235LC / DX235LCR
Condition: Genuine New / Premium OEM Replacement
2. Technical Specifications
Motor Type: High-Torque, Two-Speed Axial Piston Motor (TM40VC Architecture)
Reducer Type: Multi-Stage Planetary Gear Reduction Track Reducer
System Pressure Limits: Rated for high-pressure heavy excavator tracking (typically up to 34.3 MPa / 343 bar)
Braking Mechanism: Integrated automatic hydraulic-release parking brake assembly
Structural Fit: Standard 22-ton class frame mounting layout with heavy-duty Duo-Cone floating face seals to lock out mud and water
3. Critical Installation Requirements
Verify and Clear the Case Drain Line (Mandatory)
Before mounting the new drive, ensure the dedicated case drain line returning to the hydraulic tank is completely free of debris, blockages, or collapsed walls. A restricted case drain line creates massive internal backpressure that will instantly blow out the motor's main shaft seal and cause immediate internal component failure.
Prime the Hydraulic Motor Housing
You must manually fill the hydraulic piston section of the final drive with clean hydraulic oil through the highest available case drain port BEFORE tracking the machine for the first time. Operating a piston motor dry will destroy the internal piston slippers and valve plates within seconds.
Gearbox Lubricant Level Verification
The planetary reduction section uses heavy gear oil (typically SAE 80W-90 or 90) completely separate from the machine's hydraulic oil loop. Ensure the gearbox is filled to the center level plug mark prior to operation.
Break-In Gear Oil Schedule
Brand-new planetary gears undergo an initial wear-in cycle. It is highly recommended to drain and replace the gearbox oil after the first 50 to 100 operating hours to eliminate initial metallic wear particles, then change it every 250 to 500 hours thereafter.
4. Frequently Asked Questions (FAQ)
Q: Are all these listed part numbers (604-00276C, K1000681A) completely interchangeable?
A: Yes, these numbers represent engineering supersessions, factory part updates, and transitions across the Daewoo Solar and newer Doosan DX production eras. They utilize the same foundational TM40VC frame size and fit the standard 22-ton class track configurations. Always provide your machine's exact Serial Number to confirm sprocket bolt-hole alignment before shipping.
Q: My excavator tracks normally on flat ground but loses all power on one side when climbing slopes or pushing piles. Is the final drive broken?
A: Yes, this is a clear indicator of high internal volumetric oil bypass inside the hydraulic motor section. As the clearances increase due to internal wear, high-pressure oil leaks back through the case drain to the tank instead of producing mechanical torque, reducing climbing power.
Q: How is this heavy travel drive packaged for safe transit?
A: Due to the significant weight of a 22-ton class final drive, each unit is thoroughly drained of testing fluids, treated with rust-inhibiting storage oil, capped with heavy-duty port plugs, and bolted securely inside a reinforced, steel-banded export wooden crate.
5. Shipping & Logistics
Packaging: Heavy-duty export-grade secure protective wooden crate.
Transit Time: Global express air freight via DHL/FedEx/UPS typically delivers within 3 to 7 business days directly to your workshop or site. Sea freight coordination is also available for bulk or non-urgent orders.