Caterpillar — Cooling System Coolant (DEAC) - Change
Maintenance · Cooling system (conventional coolant with SCA)
From a Caterpillar operator's manual covering: 3054, 3054B, 3056. Check it applies to your exact model before use.
Applies to: Caterpillar 3054, Caterpillar 3056
Before you start
- Hot coolant causes serious burns; allow engine to cool before opening filler cap
- Commercially available cleaners may damage cooling system components
- Use only Caterpillar-approved cleaning products
- Improper/incomplete rinsing damages copper and metal components
- Continue flushing until all cleaning agent signs are gone
Procedure
- Stop engine and allow cooling
- Loosen cooling system filler cap slowly to relieve pressure
- Remove cooling system filler cap
- Open cooling system drain valve (if equipped) or remove drain plugs
- Remove drain plug from cylinder block
- For 3054/3054B: Remove drain plug from pipe for jacket water pump
- For 3056: Remove drain plug from heat exchanger and water cooled exhaust manifold
- Allow coolant to drain completely
- Flush cooling system with clean water to remove debris
- Close drain valve and clean/install drain plugs per torque specs
- Fill with Caterpillar Fast Acting Cooling System Cleaner mixture (0.5L cleaner per 15L system capacity for normal cleaning, or 0.5L per 3.8-7.6L capacity for heavy deposits)
- Install cooling system filler cap
- Start and run engine at low idle for minimum 30 minutes (90 minutes for heavily deposited systems) with coolant temp at least 82C
- Stop engine, allow cooling, loosen filler cap slowly to relieve pressure
- Drain and flush again with clean water until all cleaner signs are gone
Tools required
- Hydrosolve liquid cleaners (1U-5490 or 174-6854) Amazon
- Steam cleaner Amazon
- 9S-8140 Pressurizing Pump Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fast Acting Cooling System Cleaner per specified concentrations
- Fill rate not faster than 19L (5 US gal) per minute
- Normal cleaning: 0.5L cleaner per 15L system capacity
- Heavy deposit cleaning: 0.5L cleaner per 3.8-7.6L system capacity
- Coolant temperature minimum 82C (180F) during flushing
- Pressure cap test per face stamp specification
Full service-parts list: Caterpillar 3054 →, Caterpillar 3056 →
Source: Caterpillar operator'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.