Caterpillar — Cooling System Coolant (NGEC) - Change
Maintenance
From a Caterpillar owner's manual covering: B9P1-Up, CWW1-Up, CWY1-Up, GAS1-Up, GSB1-Up, GTX1-Up, GZA1-Up, GZB1-Up, GZC1-Up, GZG1-Up, GZH1-Up, GZJ1-Up…. Check it applies to your exact model before use.
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Before you start
- Pressurized system: hot coolant can cause serious burns
Procedure
- Stop engine, allow to cool, relieve pressure at filler cap
- Open drains/vent plugs to drain jacket water and separate circuit
- Flush system with clean water to remove debris
- Fill with cleaner/water mixture (0.5 L cleaner per 15 L capacity)
- Run engine 30 min minimum with coolant at least 82 °C (180 °F)
- Drain cleaning solution, flush with clean water until clear
- Fill with coolant/antifreeze, purge air at low idle then high idle
- Inspect filler cap gaskets, install, start and check for leaks
Specs & values
- Fill rate max 19 L (5 US gal) per minute
- Cleaner ratio 0.5 L per 15 L (4 US gal) capacity
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.