Komatsu 4D98 Series Shop Manual page 84

6. Cooling System
6.3 Disassembly (Reverse the procedure below for assembly)
0
Remove the alternator. See 4.2(2)0 in Chapter 4.
@ Remove the fan, V-belt and pulley. See 4.2(2)@ in Chapter 4.
@ Remove the thermostat cover. See 4.2(2)@ in Chapter 4.
@ Remove the cooling water pump.
(Point 7)
@
Remove the thermostat.
(Point 2)
6.4 Servicing Points
Point 1
Disassemble-Reassemble:
. Check to see that the cooling water pump bearing is free from abnormal noise, sticking or
play and water leakage from the bearing. If replacement is necessary, replace the whole
cooling water pump assy.
Point 2
Disassemble:
l
Check the thermostat function. See 3.9(I)@ in Chapter 3 for the inspection method.
6-2