DE12 Excavator Engine Assembly | Aftermarket Replacement Engine Compatible with Doosan Heavy Machinery
Welcome to our engine spare parts supply. We specialize in providing the heavy-duty DE12 excavator diesel engine assembly, precision-manufactured as a direct-fit aftermarket replacement component fully compatible with Doosan engineering machinery equipment. All internal cylinder blocks, crankshafts and sealing assemblies are CNC precision machined and passed strict factory power & temperature testing, stable heavy power output for large mining and mass earthwork construction, plug-and-play direct fit without modification, cost-effective overhaul component for global heavy machinery repair workshops.
- Large open-pit mine ore stripping, heavy load excavation and bulk ore transportation operation
- Mass mountain earthwork development, ultra-deep foundation pit excavation for hydropower stations
- Highway & high-speed rail roadbed filling construction, large bridge pier foundation excavation
- Super-large river dredging, reservoir reinforcement and flood control water conservancy project
- Coastal bulk port yard expansion, heavy bulk mineral cargo loading operation
- Urban super-large municipal infrastructure reconstruction, deep pipeline and high-rise basement excavation
- Insufficient engine power, weak digging force under heavy mining load
- Black smoke exhaust, incomplete fuel combustion and high fuel consumption
- Engine oil leakage, cylinder seal aging and crankcase oil seepage
- Engine overheating, radiator blockage and high temperature alarm during long operation
- Difficult cold start, unstable idle speed and engine shaking
- Insufficient system pressure, slow whole machine movement caused by worn valve plate, piston and cylinder block internal leakage
- Pump abnormal overheating and metal knocking vibration, cavitation from clogged oil suction strainer
- Pump front shaft oil seal leakage, hydraulic oil leaking to engine compartment and continuous oil consumption
- Unstable hydraulic flow, boom and bucket jitter, weak digging force under heavy load
- Hydraulic pump cavitation noise, air mixed in oil circuit leading to pressure fluctuation and power drop
- Hydraulic system long-term high temperature triggers component aging damage
- Swing weak & sliding slope: Serious wear of motor valve plate or aging internal seal leads to high-pressure oil internal leakage, unable to stop on slope
- Swing abnormal noise & sticking: Broken gear or damaged bearing inside reducer, with metal friction jamming sound
- Swing oil leakage: Oil seal abrasion leads to swing motor hydraulic oil spillage
- Swing stuck, excavator unable to rotate smoothly under full mining load
- Long-time continuous swing operation causes whole hydraulic system overheating
- Travel deviation: Inconsistent displacement of two side motors, servo valve failure or oil seal leakage of central swing joint
- One side unable to travel: Broken travel reducer gear or the motor brake cannot open normally
- Weak travel or abnormal speed: Motor displacement adjustment mechanism stuck in large displacement state, slow speed with huge torque
- Travel gear wear noise and oil leakage failure under long mine road operation
- Climbing stall caused by internal transmission parts wear on mountain mine road
- Spool sticking, unresponsive boom/arm/bucket operation caused by hydraulic impurity wear
- Internal valve leakage, automatic cylinder sinking when machine stays static
- External oil leakage at valve body joints, continuous hydraulic oil consumption and surface oil stain
- Unstable flow output, machine shaking during excavation operation
- Overflow valve failure, system overpressure triggering high temperature alarm
- Thickened CNC machined cylinder block and wear-resistant hard chrome crankshaft, tiny matching clearance, effectively reduce internal leakage under 24h continuous heavy mining load
- Complete original matching installation size as direct-fit aftermarket replacement compatible with Doosan DE series large excavator, direct disassembly replacement without cutting or modification
- 100% factory power, temperature and sealing testing before delivery, greatly reduce on-site overhaul failure rate
- High temperature & pressure resistant fluorine rubber sealing components, adapt all-day continuous heavy construction operation in high-temperature mining areas
- Support single piece trial order and mass bulk wholesale for global large excavator repair shops & spare parts distributors
- Standard export shockproof wooden case packaging to avoid engine collision damage during long-distance sea transportation
- 6 months full factory quality warranty for all DE12 aftermarket engine assemblies
- Model Number: DE12
- Product Type: Complete Diesel Engine Assembly
- Applicable Equipment: Doosan DE Series Large Excavator Construction Machinery
- Condition: Brand New Aftermarket Replacement Hydraulic Spare Parts
- Core Function: Provide stable power output for full hydraulic system of large mining excavator
- Warranty Period: 6 Months Factory Quality Warranty
| Component Category | Hot Sale Model & Part Number |
|---|---|
| Complete Diesel Engine Assembly | DE12, DE08, DL06, DL08 Engine Assembly |
| Multi-way Distributing Control Valve | PC200-8, PC360-7, DX380, DX500 Main Control Valve Assembly |
| Hydraulic Main Pump | K3V180, K5V200, HPV118, A8VO225 Hydraulic Pump |
| Swing Rotary Motor & Gearbox | PC200-7, DX300, ZX350-6 Swing Motor Assembly |
| Travel Final Drive Motor | GM60, GM65, GM85 Large Excavator Travel Motor Assembly |
This DE12 complete engine is designed as aftermarket replacement spare part fully compatible with Doosan DE series large mining excavator equipped with DE12 power system, used for full engine overhaul replacement.
It fixes engine insufficient power, black smoke, oil leakage, overheating, difficult cold start, also match swing weak, travel deviation and distributing valve sticking hydraulic faults for Doosan heavy excavator.
Yes, it is brand new aftermarket complete diesel engine, fully matched original installation size compatible with Doosan DE series large excavator for direct maintenance replacement.
Yes, MOQ is 1 piece, sufficient factory stock for global large mining excavator repair workshops and spare parts dealers.
We supply full series aftermarket engine assemblies, cylinder blocks, crankshafts and hydraulic matching parts for Doosan heavy excavator, matched overhaul kits and wear parts.
Global large mining excavator maintenance workshops and spare parts wholesalers are welcome to send inquiry for long-term stable factory supply. Send your equipment model number for free technical matching verification.
