Doosan D35S-5 Service Manual page 123

There is heavy loss of coolant.
Is the radiator hose leaking?
Is the radiator core leaking?
Is the water pump leaking?
Is the radiator pressure pump leaking?
Is the oil cooler leaking?
Check the possible leaking spots of the
engine.
D439E Service Manual
No
Does the hose clamp tighten
properly?
Cracked or damaged hose?
No
No
No
Yes
• Is the pressure range correct in
the pressure valve?
• Is gasket in good condition?
Any gas in the coolant leaked from
cylinder head gasket?
No
Are bolts tightened properly?
Defective or damaged O-ring?
Yes
Yes
Yes
Yes
Yes
Yes
121 2. Engine Mechanical System (D439E)
No
Tighten the clamp.
Replace the hose.
Repair or replace the
radiator.
Replace the O-ring
No
Replace the pressure valve.
No Replace the cylinder head
gasket.
No
Tighten the bolts.
Yes
Replace.