GENERAL STRUCTURE
S6D140-1
1. Fan pulley
2. Cylinder block
3. Cylinder liner
4. Exhaust valve
5. Piston
6. Rocker arm housing
7. Rocker arm housing cover
8. Intake valve
9. Camshaft
10. Cam follower
11. Crankshaft pulley
12. Vibration damper
13. Front cover
14. Under frame
15. Crankshaft gear
17. Connecting rod
18. Oil strainer
19. Oil pan
20. Crankshaft
21. Main bearing cap
22. Flywheel
23. Flywheel housing
25. Exhaust manifold Engine : S6D140-1 (with turbocharger)
26. Cylinder head SA6D140-1 (with turbocharger and after -cooler )
27. Oil cooler
28. Oil pump
29. Intake connector pipe
Type : In-line, 6-cylinder, water-cooled, direct fuel injection, 4-cycle diesel engine
30. Electrical intake air heater
31. Intake manifold
32. Push rod
33. Dipstick
VALVE SYSTEM
Engine No. 10001 - 19603
1. Thrust plate
2. Camshaft gear
3. Camshaft
4. Cam roller
5. Cam roller pin
6. Cam follower shaft
7. Cam follower
8. Push rod
9. Rocker arm shaft
10. Rocker arm
11. Lock nut
12. Rocker arm adjustment screw
13. Cross head adjustment screw
14. Lock nut
15. Cross head
16. Upper spring seat
17. Outer valve spring
18. Inner valve spring
19. Exhaust valve
20. Valve guide
21. Lower spring seat
22. Intake valve
CAM SHAFT
• Stamp forging
• Journal and cam portion:
Induction hardening
MAIN CIRCULATION SYSTEM
1. Piston
2. Piston pin
3. Connecting rod, bushing .
4. Top ring
5. Second ring
6. Oil ring
7. Crankshaft pulley
8. Vibration damper
9. Crankshaft
10. Crankshaft gear
11. Connecting rod bearing
12. Connecting rod cap
13. Connecting rod
14. Connecting rod cap mounting bolt
CRANKSHAFT
• Stamp forging
• Journal and filet portion:
Induction hardening
PISTON
• Ductile cast iron
CONNECTING ROD
• Stamp forging
TIMING GEAR
1. Water pump drive gear (No. of teeth : 23)
2. Sub idler gear (No. of teeth : 42)
3. Main idler gear (Large) (No. of teeth : 60)
4. Main idler gear (Small) (No. of teeth : 40)
5. Camshaft gear (No. of teeth : 48)
6. PTO gear (OPTION) (No. of teeth : 14)
7. Compressor drive gear (No. of teeth : 24)
8. Fuel injection pump drive gear (No. of teeth : 46)
9. PTO gear (OPTION) (No. of teeth : 22)
10. Crankshaft gear (No. of teeth : 36)
11. Oil pump drive gear (No. of teeth : 22)
A, B, C: Match marks
LUBRICATION SYSTEM CHART
1. Oil pan
2. Oil strainer
3. Oil pump
4. Main relief valve
5. Oil cooler
6. Thermostat
7. Regulator valve
8. Valve adapter
9. Oil filter
10. Safety valve
11. Crankshaft
12. Piston cooling nozzle
13. Piston
14. Camshaft
15. Cam follower
16. Rocker arm
17. Intake and exhaust valve
18. Timing gears
19. Turbocharger
20. Fuel injection pump
W : Cooling water
LARGE CAPACITY OIL FILTER + BY PASS FILTER
1. Oil pan
2. Oil strainer
3. Oil pump
4. Main relief valve
5. Oil cooler
6. Thermostat
7. Regulator valve
8. Valve adapter
9. Oil filter ( full flow filter x 2 )
10. Safety valve
11. Crankshaft
12. Piston cooling nozzle
13. Piston
14. Camshaft
15. Cam follower
16. Rocker arm
17. Intake and exhaust valve
18. Timing gears
19. Turbocharger
20. Fuel injection pump
21. Bypass filter
W : Cooling water
FUEL SYSTEM CHART
1. Fuel tank
2. Gauze filter
3. Priming pump
4. Feed pump
5. Fuel filter
6. Fuel injection pump
7. Fuel injection nozzle
8. Over-flow valve
FUEL INJECTION PUMP
1. Fuel injection pipe (No. 1 )
2. Fuel injection pipe (No. 2) -
3. Fuel injection pipe (No. 3)
4. Fuel injection pipe (No. 4)
5. Fuel injection pipe (No. 5)
6. Fuel injection pipe (No. 6)
7. Air bleeder plug
8. Oil tube (inlet)
9. Fuel injection pump drive gear (No. of teeth 48)
10. Fuel injection pump drive shaft
11. Bearing box
12. Coupling
13. Feed pump
14. Fuel injection pump
15. Gauze filter
16. Oil tube (outlet)
17. Fuel filter
FUEL INJECTION NOZZLE
1. Fuel inlet connector
2. Nozzle holder
3. Adjustment shim.
4. Spring
5. Seat
6. Spacer
7. Nozzle
8. Retaining cap
9. Needle valve
FUEL INJECTION NOZZLE
• Maker : DIESEL KIKI ( S6D140-1 )
NIPPO DENSO ( SA6D140-1 )
• Type : Multi-hole nozzle
• Injection pressure : 250 kg/cm ²
• Adjusting injection pressure : Shim adjusting type.
a. Fuel inlet (From injection pump)b. Injection (To cylinder)
c. Fuel return (To fuel tank)
S6D140-1: Made by DIESEL KIKI
(Diameter of nozzle hole 0.35 x 7 hole)
SA6D140-1: Made by DIESEL KIKI
Made by NIPPON DENSO
(Diameter of nozzle hole 0.36 x 6 hole)
COOLING SYSTEM CHART
1. Radiator
2. Thermostat
3. After-cooler (SA6D140-1)
4. Air compressor (if equipped)
5. Water pump
A. Lubrication
6. Oil cooler
7. Corrosion resistor
8. Cooling fan
MEASURING BLOW - BY PRESSURE
Measure the blow by pressure under the following conditions.
Temperature of cooling water:
Within operating range
Temperature of hydraulic oil: 45 - 55°C
1. Set tool E4 and E, to blow by hose (1).
2. Use tool E3 to connect tool E, and E2.
3. Run the engine at the rated output and measure the blow by pressure as follows.
- Blow by varies greatly according to the condition of the engine. Therefore, if the blow by value is considered abnormal, check for problems connected with defective blow by, such as excessive oil consumption, defective exhaust gas color, and prematurely dirty or deteriorated oil.
- When taking measurements, be careful not to touch any hot parts or rotating parts.
1) Before starting measurements,. set the work equipment to the following posture.
A: When setting the work equipment in position, be careful not to let the blade hit the tire.
B: For the draw bar shift, take the center position as the standard position.
C: Shift the blade fully to the right.
D: Rotate the circle to give a propulsion angle of 50°.
E: Raise the blade fully on both the left and right sides.
2) Pull right blade lift lever (1) back, and hold it at the end of its stroke.
- Raise the right end of the blade, and relieve the circuit.
3) In the condition in Step 2), operate blade left shift lever (2) and circle left rotation lever (3) at the same time to the front to move the work equipment.
- Use the blade left shift lever and the circle left rotation lever to set the oil discharge amount to the maximum .
MEASURING COMPRESSION PRESSURE
When measuring the compression pressure, be careful not to touch the exhaust manifold or muffler, or to get caught in rotation parts.
1. Adjust valve clearance.
- For details, see TESTING AND ADJUSTING VALVE CLEARANCE.
2. Warm up engine (oil temperature 40 - 60°C).
3. Remove nozzle holder assembly.
4. Install tool Dz to the nozzle holder mount, then connect pressure gauge D,.
5. Set engine tachometer in position.
6. Disconnect connector (2) of stop motor (1), set to the NO INJECTION position, then crank the engine and measure the compression pressure.
- Measure the compression pressure at the point where the pressure gauge indicator remains steady.
- When measuring the compression pressure, measure the engine speed to confirm that it is within the specified range
TESTING AND ADJUSTING VALVE CLEARANCE
- Adjust clearance between rocker lever and top of cross head to following value.
Intake valve (at 20°C) Exhaust valve (at 20°C) 0.43 mm 0.80 mm
1. Remove cylinder head cover (1).
2. Rotate the crankshaft in the normal direction to align pointer (2) with the 1.6 TOP mark of crankshaft pulley. When rotating, check the movement of the intake valve of No. 1 cylinder and No. 6 cylinder. Set with No. 1 cylinder at compression top dead center.
3. When No. 1 cylinder is at compression top dead center, adjust the valves marked
- Then rotate the crankshaft one turn in the normal direction, set No. 6 cylinder to compression top dead center, and adjust the valves marked O.
4. To adjust, insert tool F between rocker lever (3) and cross head (4) and turn adjustment screw (5) until clearance is a sliding fit.
Tighten lock nut (6) to hold adjustment screw in position.
Lock nut: 58.8 t 5.9 Nm (6.0 t 0.6 kgm)
5. Then rotate the crankshaft in the normal direction by one turn and adjust the valve clearance for the remaining valves marked o.
- After adjusting No. 1 cylinder at compression top dead center, it is also possible to turn the crankshaft 120° each time and adjust the valve clearance of each cylinder according to the firing order.
• Firing order: 1 - 5 - 3 - 6 - 2 - 4
- After tightening the lock nut, check the clearance again.