Caterpillar C27 / C32 — Cooling System Coolant (DEAC) - Change
Maintenance
For the Caterpillar C27 / C32, from the Caterpillar owner's manual.
Applies to: Caterpillar C32
Before you start
- Hot coolant can cause serious burns. Loosen the pressure cap slowly to relieve pressure.
- Use only cooling system cleaners approved for Caterpillar engines.
Procedure
- Stop the engine and allow the engine to cool. Loosen the filler cap slowly to relieve pressure; remove the cap.
- Open the cooling system drain valve or remove a drain plug; allow the coolant to drain.
- Flush the cooling system with clean water in order to remove any debris.
- Close the drain valve; clean and install the drain plugs.
- Fill with a mixture of clean water and Cat Fast Acting Cooling System Cleaner; install the filler cap.
- Start and run the engine at low idle for a minimum of 30 minutes; coolant temperature should be at least 82 °C (180 °F).
- Stop the engine and allow to cool; drain, flush with clean water and close the drain valve.
- Fill the cooling system with coolant/antifreeze; refer to Refill Capacities and Recommendations.
Tools required
- 9S-8140 Pressurizing Pump Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fill no faster than 19 L (5 US gal) per minute
- 82 °C (180 °F) minimum coolant temperature during cleaning
- 0.5 L (1 pint) of cleaner per 15 L (4 US gal) of cooling system capacity
Full service-parts list: Caterpillar C32 →
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.