Page 602 - Workshop Manual - Aumark (BJ1051)

16-2
Cooling-Cooling system

On-vehicle inspection

1. Checking coolant level in surge tank
(a) Visually check that the coolant level in surge tank is between lines MIN (minimum) and
MAX (maximum) with engine cold.
(b) If engine coolant level is too low, check cooling system for leakage and add “Foton
special-purpose long-acting coolant” or similar high-quality long-acting hybrid organic acid
technology based ethylene glycol coolant (free of silicate, amine, nitrite, and borate) to the
MAX line.
Notice:
Never use water as coolant only.
2. Checking cooling system for leakage (refer to Service Manual for Cummins ISF Series
Engines)
16
3. Checking quality of engine coolant
Caution:
Never open the pressure cap with engine hot. Wait and do not open the cap until coolant
temperature drops below 50℃, otherwise ejecting hot coolant or steam may cause personal
injury.
(a) Open surge tank cap.
(b) Put a vessel under radiator outlet to hold discharged coolant.
(c) Loosen water drain valve of radiator to drain a little engine coolant, and check round the
valve for excessive rust or scale deposit. In addition, coolant can not contain engine oil. In
the case of excessive dirt, clean the cooling system and change coolant.
(d) Install water drain valve of radiator, at the same time, check coolant level in surge tank.
When necessary, add coolant to specified position.
4. Cleaning cooling system (refer to Service Manual for Cummins ISF Series Engines)

Page 602