Caterpillar 3512 — Cooling System Coolant - Change
Maintenance
For the Caterpillar 3512, from the Caterpillar owner's manual.
Applies to: Caterpillar 3512, Caterpillar 3512B engine
Before you start
- Use only cooling system cleaners that are approved for Caterpillar engines
- Improper or incomplete rinsing can damage copper and other metal components
Procedure
- Stop the engine and allow the engine to cool.
- Loosen the filler cap slowly to relieve pressure; remove the cap.
- Open drain valves or remove drain plugs (1) and (2); drain the coolant.
- Flush the cooling system with clean water to remove debris.
- Close drain valves; clean and install the drain plugs.
- Fill with a mixture of clean water and Cooling System Cleaner; install filler cap.
- Start the engine and operate at a coolant temperature of at least 82 °C (180 °F).
- Stop, cool, drain, and flush the system until water is clean.
- Fill the cooling system with coolant/antifreeze; do not install the filler cap.
- Start the engine to purge air; allow coolant to stabilize; stop the engine.
- Check coolant level; maintain within 13 mm (0.5 inch) below the bottom of the filler pipe.
- Inspect filler cap gaskets; pressure test (9S-8140 Pump) or replace the cap.
- Start the engine and inspect for leaks and proper operating temperature.
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 to avoid air locks
- Operate at coolant temperature of at least 82 °C (180 °F)
Full service-parts list: Caterpillar 3512 →, Caterpillar 3512B engine →
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.