14
14-9
3. Coolant Replacement and Cleaning of Cooling System
Tightening torque (Unit: N·m {kgf·m})
•
Using the radiator for extended periods of time without cleaning can increase chance of rust and scale formation,
which may cause engine overheating. The cooling system must be cleaned periodically.
Use a coolant containing the FUSO DIESEL LONGLIFE COOLANT additive and soft water in the specified pro-
portions. (See the Owner’s Handbook for instructions on the use of the additive.)
3.1 Draining of coolant
•
Before draining the coolant, loosen the pressure cap to reduce the pressure in the cooling system. Remember to
drain the coolant out of the reservoir tank as well.
WARNING
• Drain the coolant only after it has cooled sufficiently to avoid getting scalded.
• Opening the pressure cap while the coolant temperature is still high can cause hot coolant to spray
out. Cover the pressure cap with a cloth, and loosen it slowly to let the pressure out before opening it
fully.
3.2 Cleaning procedure
CAUTION
• Water used for flushing the cooling system must be soft water that has a property meeting the require-
ments indicated below. Using hard water will cause scale and rust to form in the system.
Required properties of soft water
Total hardness .......................... 300 ppm or less
Sulfate SO .............................. 100 ppm or less
Chloride CI ............................. 100 ppm or less
Total dissolved solids .............. 500 ppm or less
pH .............................................. 6 to 8
•
Keep the coolant temperature at approximately 90
°
C so that the thermostat valve remains open and coolant con-
tinues to circulate in the radiator.
•
For the sake of convenience you can raise the coolant temperature quickly by covering the front of the radiator
with corrugated cardboard or something similar.
•
In cases where a great amount of rust has accumulated it is common for the radiator to leak as a result of clean-
ing. Conduct a through check for leakage after cleaning.
•
Select an appropriate cleaning method according to the condition of the cooling system as shown below.
Mark
Parts to be tightened
Tightening torque
Remarks
–
Radiator drain cock
2.0 {0.2}
–
–
Crankcase drain cock
37 {3.8}
–
4
Summary of Contents for 6M70
Page 29: ...M E M O 11 19 11 ...
Page 35: ...M E M O 11 25 11 ...
Page 36: ...11 26 MITSUBISHI 6M70 ROCKER COVER ROCKER AND SHAFT ...
Page 40: ...11 30 MITSUBISHI 6M70 CAMSHAFT AND ROCKER CASE ...
Page 47: ...M E M O 11 37 11 ...
Page 48: ...11 38 MITSUBISHI 6M70 CYLINDER HEAD AND VALVE MECHANISM ...
Page 63: ...M E M O 11 53 11 ...
Page 71: ...M E M O 11 61 11 ...
Page 77: ...M E M O 11 67 11 ...
Page 81: ...M E M O 11 71 11 ...
Page 98: ...11 88 MITSUBISHI 6M70 CRANKSHAFT AND CRANKCASE ...
Page 127: ...M E M O 12 21 12 ...
Page 129: ...M E M O 12 23 12 ...
Page 135: ...M E M O 13 3 13 ...
Page 138: ...13 6 1 1 Mitsubishi 6M70 Supply pump STRUCTURE AND OPERATION ...
Page 150: ...13 18 10 Electronic control unit connection diagram STRUCTURE AND OPERATION ...
Page 151: ...13 13 19 ...
Page 155: ...M E M O 13 23 13 ...
Page 185: ...M E M O 13 53 13 ...
Page 189: ...M E M O 13 57 13 ...
Page 205: ...M E M O 13 73 13 ...
Page 211: ...M E M O 13 79 13 ...
Page 215: ...M E M O 13 83 13 ...
Page 219: ...M E M O 13 87 13 ...
Page 225: ...M E M O 13 93 13 ...
Page 226: ...13 94 INSTALLED LOCATIONS OF PARTS ...
Page 227: ...13 13 95 ...
Page 228: ...13 96 INSTALLED LOCATIONS OF PARTS ...
Page 229: ...13 13 97 ...
Page 230: ...13 98 INSTALLED LOCATIONS OF PARTS ...
Page 231: ...13 13 99 ...
Page 232: ...13 100 MITSUBISHI 6M70 INSTALLED LOCATIONS OF PARTS ...
Page 233: ...13 13 101 ...
Page 234: ...13 102 ELECTRIC CIRCUIT DIAGRAM ...
Page 235: ...13 13 103 ...
Page 236: ...13 104 ELECTRIC CIRCUIT DIAGRAM ...
Page 237: ...13 13 105 ...
Page 238: ...13 106 ELECTRIC CIRCUIT DIAGRAM ...
Page 241: ...14 14 3 1 Mitsubishi 6M70 Cooling System Flow of Coolant STRUCTURE AND OPERATION ...
Page 252: ...14 14 Periphery of Engine DISCONNECTION AND CONNECTION OF HOSES AND PIPES ...
Page 271: ...M E M O 14 33 14 ...
Page 286: ...M E M O 15 13 15 ...
Page 295: ...15 22 7 Installed Locations of Parts TURBOCHARGER CONTROL SYSTEM ...
Page 296: ...15 15 23 ...
Page 297: ...15 24 TURBOCHARGER CONTROL SYSTEM ...
Page 298: ...15 15 25 ...
Page 299: ...15 26 TURBOCHARGER CONTROL SYSTEM ...
Page 300: ...15 15 27 ...
Page 301: ...15 28 TURBOCHARGER CONTROL SYSTEM ...
Page 302: ...M E M O 15 29 15 ...
Page 303: ...15 30 8 Electric Circuit Diagram TURBOCHARGER CONTROL SYSTEM ...
Page 304: ...15 15 31 ...
Page 305: ...15 32 TURBOCHARGER CONTROL SYSTEM ...
Page 306: ...M E M O 15 33 15 ...
Page 330: ...M E M O 15 57 15 ...
Page 340: ...17 6 1 3 Electronic control unit connection diagram STRUCTURE AND OPERATION ...
Page 343: ...M E M O 17 9 17 ...
Page 351: ...M E M O 17 17 17 ...
Page 352: ...17 18 8 Installed Locations of Parts EXHAUST GAS RECIRCULATION SYSTEM ...
Page 353: ...17 17 19 ...
Page 354: ...17 20 EXHAUST GAS RECIRCULATION SYSTEM ...
Page 355: ...17 17 21 ...
Page 356: ...17 22 EXHAUST GAS RECIRCULATION SYSTEM ...
Page 357: ...17 17 23 ...
Page 358: ...17 24 9 Electric Circuit Diagram EXHAUST GAS RECIRCULATION SYSTEM ...
Page 359: ...17 17 25 ...
Page 360: ...17 26 MITSUBISHI 6M70 EGR VALVE EGR MAGNETIC VALVE EGR PIPE AND EGR COOLER ...