DH55 DH55-Diesel-Engine-Assembly Diesel Engine Assembly Compatible with Doosan

1. Product Overview & Wholesale Price Range

The DH55 Diesel Engine Assembly is a complete power unit for DH55 excavator, fully assembled and performance tested for direct replacement during engine overhaul.

• Factory Wholesale Price: $3800 – $6500 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
• Component Type: Complete Diesel Engine Assembly
• MPN: DH55-Diesel-Engine-Assembly
• Reference Model: DH55
• MOQ & Bulk Discount: 1 Unit (Tiered wholesale discounts available for repair shop & distributor batch orders)
• Lead Time: 3–7 business days (Large factory stock ready for immediate worldwide dispatch)
• Warranty: 12 Months full replacement warranty with engine performance test guarantee

2. Application Worksite Checklist

Engineered with reliable engine structure and sealed assembly, to withstand harsh construction site conditions:

• Excavator Power Supply: Provides stable power output for DH55 excavator digging, loading and moving operations.
• Earthmoving & Digging Jobs: Good torque performance to meet heavy load excavation requirements.
• Long-Hour Continuous Operation: Stable cooling and lubrication system ensures long-time continuous running.
• Engine Overhaul: Complete engine assembly can directly replace old engine to save overhaul time and labor cost.

3. Diesel Engine Troubleshooting & Diagnostic Guide

If your machinery power system is exhibiting engine-related failure, consult the diagnostic guide below:

• Fault 1: Engine cannot start
  Root Cause: Fuel supply failure, internal component wear, compression loss.
  Solution: Replace with new DH55 diesel engine assembly, check fuel circuit.
• Fault 2: Engine power drop & weak torque
  Root Cause: Cylinder wear, fuel injection system aging, air intake blockage.
  Solution: Install new DH55 engine assembly and clean intake system.
• Fault 3: Engine Oil Leakage
  Root Cause: Aging sealing gaskets, engine housing damage.
  Solution: Replace complete engine assembly and inspect oil pipeline.
• Fault 4: Engine excessive smoke
  Root Cause: Cylinder liner & piston wear, fuel atomization bad.
  Solution: Replace engine assembly before pursuing expensive internal engine repairs.
• Fault 5: Engine Overheating During Operation
  Root Cause: Internal cooling system failure, cylinder overloaded.
  Solution: Replace complete engine assembly to avoid repeated overheating trouble.

4. Hot Machinery Replacement Parts Recommendation

Explore our factory-direct replacement components compatible with major global excavator brands:

5. Frequently Asked Questions & Technical Support

Q1: How do I verify if DH55 diesel engine assembly fits my machinery?
A: Check your original engine model. Send machine serial number to us for quick fitment check.

Q2: What is included in this DH55 diesel engine assembly?
A: Complete assembled diesel power unit, ready for installation. Please contact us for detailed parts list.

Q3: What should I note during engine installation?
A: Replace engine oil, coolant and filter before startup, test run after installation.

Q4: Is this engine assembly suitable for long time heavy load work?
A: It adopts strict factory testing, reliable internal structure, anti-wear design, suitable for construction site heavy load operation.