Do not perform this maintenance until you read and
understand the material in the Safety and Cooling
System Specifications sections of this publication.
maintenance of cooling system surfaces to return to
"like new" condition. For heavy build-up of scale
and deposits, a severe acid-type commercial cleaner
or mechanical cleaning will be required.
Refer to Cooling System Specifications for additional
information regarding appropriate Flush/Fill for your
Stop the engine and allow to cool. Loosen the
radiator filler cap slowly to relieve any pressure
and remove the cap.
Remove the drain plug from the side of cylinder
block. Open the drain valve on bottom of cooling
water system radiator and allow the coolant to
NOTE: If the cooling water system radiator does not
have a drain valve or plug, disconnect the
radiator bottom tank hose from the water
Remove the block drain plug(s) from jacket water
heater (if equipped). Allow coolant to drain.
Dispose of used engine coolant or recycle. Various
methods have been proposed to reclaim used coolant
for reuse in engine cooling systems. The full distillation
procedure is the only method acceptable by Caterpillar
to reclaim the used coolant.
Contact Caterpillar Service Technology Group:
Outside Illinois: 1-800-542-TOOL
Inside Illinois: 1-800-541-TOOL
Refer to Service Magazine article dated November 13,
1989 and/or Engine News article dated November 1989
for information regarding disposal and recycling of used
Every 2000 Service Hours or 2 Year