mitsubishi s6s-dt engine

Instructor: Jean Joris Service Department1

Mitsubishi TIER IIMitsubishi TIER II, , S6S-DTS6S-DT engineengine(Fork-lift specification)(Fork-lift specification)

Training:Training:


Mitsubishi:Mitsubishi:

- Mitsubishi was founded in 1870- Sagamihara factory opened in 1970- Since 1992 Joint Venture with Caterpillar for engines and forklifts- 2200 employees


Engine specifications:Engine specifications:

Rotation direction:Rotation direction: Clockwise, viewed from the front (timing gear side)



Engine output:Engine output: 65kW/ 88 Hp

Number of cylinders:Number of cylinders: 6

Bore x Strole (mm):Bore x Strole (mm): 94 x 120

Displacement (cc):Displacement (cc): 4996

Compression ratio: Compression ratio: 19.5 : 1

Intercooler:Intercooler: N/A

Rated power (kW/rpm):Rated power (kW/rpm): 65kW/2200

Peak torque (Nm/rpm):Peak torque (Nm/rpm): 348/1400

Low idle speed (rpm):Low idle speed (rpm): 2400 +/- 50

High idle speed (rpm):High idle speed (rpm): 875 +/- 50

Injection pump:Injection pump:

• Distributor (Bosch VE-type)

Engine Oil Quantity: Engine Oil Quantity:

• 17.5L

Combustion Combustion method:

• Direct injection



Firing order:Firing order: 1-5-3-6-2-4

Nominal compression pressure at 300 Rpm:Nominal compression pressure at 300 Rpm: • 2.94 MPa. (29.4 bar) (oil and water temp. at: 20 / 30°c)• Limit: 2.64 MPa. (26.4 bar)

Lubricating oil pressure:Lubricating oil pressure:

• At 1500 rpm: 0.29 – 0.49 MPa. (2.9 – 4.9 bar) Limit: 0.15 MPa (1.5 bar)• Idling: 0.1MPa (1 bar). Limit: 0.05 MPa (0.5 bar) Oil temperature: 70 90°C• Oil pressure relief valve (piston) opening pressure: 0.35 +/- 0.05 MPa (3.5 +/- 0.5 bar)


Engine serial position:Engine serial position:

Engine serial number is stamped in the block under the exhaust manifold,

close to the flywheel.


Tightening Torque Tables:Tightening Torque Tables:


Maintenance intervals:Maintenance intervals:

• Every 10 Hrs / daily service:

- Engine oil level check / add

- Air filter element check / clean

• Every 50 Hrs service: - Engine oil & oil filter change / replace (initial 50 hours only)

- Water separator check / clean

• Every 250 Hrs service:

- Engine oil & oil filter change / replace

• Every 500 Hrs service:- Air cleaner element * - Adjust valves

- Fuel filter* = air cleaner element / fuel filter change interval may be determined by an air / fuel restrictor indicator


Maintenance interval & data:Maintenance interval & data:

Valve clearance (cold): Valve clearance (cold): 0.25 mm (inlet & exhaust)Every 500 Hrs !

Fan belt deflection: Fan belt deflection: 10~12 mm

Engine oil spec. / interval: Engine oil spec. / interval: CH-4 15W-40 / 250 Hrs


Fuel injection system:Fuel injection system:

Injector nozzle valve opening pressure:

17.65 MPa (176.5 bar)

Fuel injection pump:


Fuel injection system:Fuel injection system: Injectors Injectors

Tightening toque for re-assembling injector:

24.5 34.3 Nm


Fitting the fuel injection system:Fitting the fuel injection system:- Install the pump align the mark (3) on the pump gear with the mark (3) on the timing gear. (remove complete timing cover)

- Or install the pump and align the mark (3) on the pump gear with the mark you made earlier on the timing gear. (remove cover over fuel injection gear)


Adjusting the fuel injection system:Adjusting the fuel injection system:

- Turn crankshaft clockwise until TDC

- Pointer 0°

- Inlet & exhaust rocker arm cylinder No.:1 =

loose (not actuated)

- Check that the alignment mark (A) of the fuel injection pump is aligned with the alignment mark (B) of the flange plate.

15


Lubrication system:Lubrication system:

Lubricating oil pressure:Lubricating oil pressure:

- At 1500 rpm: 0.29 – 0.49 MPa. (2.9 – 4.9 bar) Limit: 0.15 MPa (1.5 bar)- Idling: 0.1MPa. (1 bar)

Limit: 0.05 MPa (0.5 bar) Oil temperature: 70 90°C- Oil relief valve (piston) opening pressure: 0.35 +/- 0.05 MPa (3.5 +/- 0.5 bar)

- Safety valve opening pressure: 1.1 MPa. (11 bar)

Oil cooler



Position: relief & safety valves



Oil pressure relief valve:


Lubrication system:Lubrication system: oil filter by-pass oil filter by-pass

By-pass valve opens: when filter is clogged and there is a pressure difference of more then 0.1 +/- 0.02 MPa ( 1 +/- 0.2 bar) between the upstream and downstream oil pressure.


Lubrication system:Lubrication system: oil cooling jets oil cooling jets



What role has the oil in the engine:

• It reduces friction of sliding surfaces and prevents seizures.• It fills gaps between metal parts and seals the combustion chamber to prevent leaks of combustion energy.• It rinses away carbon and impurities produced by combustion. • It protects metal parts from corrosive products with oil film, thus preventing rust.


Cooling system:Cooling system:

- System is forced circulation type.

- Coolant is sucked by the water pump out of the radiator via the cylinders through the cylinder head thermostat.

- When the coolant is below 76.5°C it circulates via a by-pass to the water pump and back into the cylinder block.

-When the coolant goes over 76.5°C the thermostat gradually opens and the coolant flows direct into the radiator. (thermostat max. open at 90°C)


Cooling system:Cooling system:

Test procedure for thermostat:


Outline of inlet and exhaust system:Outline of inlet and exhaust system:

In the Material Handling Equipment configuration, the engine is not equipped with an air to air intercooler.

Turbo: Mitsubishi TE06H

Boost pressure at 87HP/2200rpm : +/- 460mmHg = +/- 61 kPa (0.61 bar)


Mitsubishi S6S-DTMitsubishi S6S-DT with distributor VE inj. pumpwith distributor VE inj. pump

Thank you for your attention, this is the end of the training presentation for this particular engine. More details on this engine can be found: http://ce.hhi.co.kr/eng/parts/sm/ENGINE/3.pdf

mitsubishi s6s-dt engine

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