Doosan D35S-5 Service Manual page 38

5. Remove the crank shaft damper pulley nut (2)
and remove the crankshaft damper pulley (1).
6. Remove the engine coolant temperature sensor
(1) connector and remove the thermostat housing
(2) from the cylinder head.
D439E Service Manual
7. Remove the cam speed sensor (1) from the
timing gear case and then remove the timing gear
case (2).
NOTE : Check the front oil seal (1) state. If it is
normal, do not remove it.
36 2. Engine Mechanical System (D439E)