1. Introduction

Komatsu PC200-7 classic 20-ton excavator is equipped with **SAA6D102E-2 (Cummins 6D102)** in-line 6-cylinder mechanical pump engine. It has a simple and durable structure, cheap accessories, low failure rate, and large market retention.

2. Engine core parameters

Model: SAA6D102E-2

Structure: In-line 6-cylinder, four-stroke, water-cooling, mechanical direct injection, turbocharging, intercooling

Displacement:

Bore size × stroke:

Rated power:

Maximum torque:

Oil capacity: about 24L

Emission standards: National II/European II, pure mechanical large pump, no EGR

3. Machine parameters

Overall machine weight: 20.25t

Standard bucket:

Fuel tank: 400L

Hydraulic oil tank: 143L

Features: stable power, fuel-saving and durable, low maintenance cost

4. Common diseases

1. Burning engine oil and causing large exhaust gas

The piston rings are worn, the cylinder liner is strained, the valve oil seals are aging, and the turbocharger is leaking. It is necessary to replace the four components and overhaul the supercharger.

2. Cold engine is difficult to start and vibrates at idle speed

The atomization of the fuel injector is poor, the high-pressure oil pump plunger is worn, and the fuel supply pressure is insufficient.

3. Insufficient power, holding the car, and black smoke

The air filter is clogged, the intake air is leaking, the injection timing is off, and the turbine pressure is insufficient.

4. Engine water temperature is high

The water tank is clogged, the water pump impeller is corroded, the thermostat is stuck, and the belt is slipping.

5. Oil pressure is low

The oil pump is worn, the crankshaft bush and connecting rod bush clearance is too large, and the oil passage is clogged.

5. Maintenance standards

Engine oil: CF-4 15W-40, change every 250 hours

Synchronous replacement of three filters

Valve clearance: 500 hours of adjustment

Injector inspection: 2000 hours

Overhaul cycle: approximately 12,000 hours to replace four components, valves, and bearings