Mitsubishi S6S-DT Engine

Training: Training: Mitsubishi TIER II , S6S-DT engine (Fork-lift specification) Instructor: Jean Joris

1 Service Department

Mitsubishi:

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

Instructor: Jean Joris


Engine specifications:

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



Engine specifications: Engine output: Number of cylinders:

65kW/ 88 Hp 6

Bore x Strole (mm):

94 x 120

Displacement (cc):

4996

Compression ratio:

19.5 : 1

Intercooler:

N/A

Rated power (kW/rpm):

65kW/2200

Peak torque (Nm/rpm):

348/1400

Low idle speed (rpm):

2400 +/- 50

High idle speed (rpm):

875 +/- 50

In jection pump: pump: Injection • Distributor (Bosch VE-type) Engine Engine Oil Quantity: • 17.5L Combustion method: • Direct injection



Engine specifications: Firing Firing order: 1-5-3-6-2-4 Nominal compression 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 Lubricatin g oil pressure: 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 number is stamped in the block under the exhaust manifold, close to the flywheel.



Tightening Torque Tables:









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


10Service Department

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

Fan belt deflection: 10~12 mm

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



Fuel in jection system: injection Injector nozzle valve opening pressure: 17.65 MPa

(176.5 bar)

Fuel injection pump:



Fuel in jection system: Injectors injection

Tightening toque for re-assembling injector: 24.5



34.3 Nm



Fitti ng the fuel injection system: ng Fitting - Install the pump align 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)



Ad justing the fuel injection system: Adjusting - 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 15Service Department

Lubrication system: system: Oil cooler

Lubricating 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)



Lubrication system: system: Position: relief & safety safety valves



Lubrication system: system: Oil pressure relief valve:



Lubrication system: 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: system: oil cooling jets



Lubrication system: system: 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 pr event event 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.



Cool ing system: ing Cooling

- 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)



Cool ing system: ing Cooling Test procedure for thermostat:



Outline of inlet and e xhaust system: exhaust Boost pressure at 87HP/2200rpm : +/- 460mmHg = +/- 61 kPa

(0.61 bar)

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

Turbo: Mitsubishi TE06H



Mitsubishi S6S-DT with 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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