
31200243 117
Maintenance Section
Cooling System Coolant -
Change
Personal injury can result from hot coolant, steam and
alkali.
At operating temperature, engine coolant is hot and
under pressure. The radiator and all lines to heaters
or the engine contain hot coolant or steam. Any
contact can cause severe burns.
Remove filler cap slowly to relieve pressure only when
engine is stopped and radiator cap is cool enough to
touch with your bare hand.
Do not attempt to tighten hose connections when the
coolant is hot, the hose can come off causing burns.
NOTICE
Care must be taken to ensure that fluids are contained
during performance of inspection, maintenance, testing,
adjusting and repair of the product. Be prepared to collect
the fluid with suitable containers before opening any
compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar
Dealer Service Tool Catalog" for tools and supplies
suitable to collect and contain fluids on Caterpillar
products.
Dispose of all fluids according to local regulations and
mandates.
If the coolant in the machine is changed to another
type of coolant, consult your Caterpillar dealer.
1. Allow the engine to cool.
Illustration 215 g01081067
2. Loosen pressure cap (1) from the coolant tank
slowly in order to release pressure. Remove the
pressure cap.
Illustration 216 g00984483
3. Loosen drain valve (2) that is located at the bottom
right corner of the radiator. Drain the coolant into a
suitable container.
Illustration 217 g00993488
4. Remove coolant drain plug (3) that is located in the
engine block above the starter. Drain the coolant into a
suitable container.
Note: Check the threads of the drain plug for damage.
Check the sealant on the drain plug for damage. The
drain plug can be reused if threads are not damaged
and the sealant is not damaged.
Illustration 218 g00993528
5. Loosen hose clamp (5) that is located on the
hydraulic oil cooler. Remove hose (4). Allow the
coolant to drain into a suitable container.