Caterpillar C15 Industrial Engine — Cooling System Coolant (ELC) - Change
Maintenance
For the Caterpillar C15 Industrial Engine, from the Caterpillar owner's manual.
Applies to: Caterpillar C1.5 engine
Before you start
- Pressurized System: Hot coolant can cause serious burns.
- Dispose of used engine coolant properly or recycle.
Procedure
- Drain: stop engine, allow to cool, loosen filler cap slowly, remove cap, open drain valve or remove drain plugs, allow coolant to drain.
- Flush: flush with clean water to remove debris; close drain valve, clean and install drain plugs.
- Fill with clean water. Install the cooling system filler cap.
- Start engine and run at low idle until temperature reaches 49 to 66 °C (120 to 150 °F).
- Stop engine, cool, remove cap, drain water; flush with clean water; close drain valve, clean and install drain plugs.
- Fill: fill with Extended Life Coolant (ELC); refer to Refill Capacities and Recommendations.
- Start engine, run at low idle, increase to high idle for one minute to purge air; stop engine; add ELC to full.
- Clean filler cap, inspect gasket, pressure test with 9S-8140 Pressurizing Pump; replace cap if needed.
- With coolant recovery tank: fill recovery tank to 'COLD FULL' mark; install cap; start engine and inspect for leaks.
- Without recovery tank: maintain coolant level within 13 mm (.5 inch) below bottom of filler pipe or to proper sight glass level.
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
- Coolant level within 13 mm (.5 inch) below bottom of filler pipe
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.