Perkins — How to drain the cooling system
Maintenance
From a Perkins owner's manual covering: 4000 Series, 4006-23 TAG1A, 4006-23 TAG2A, 4006-23 TAG3A. Check it applies to your exact model before use.
Applies to: Perkins 4006-23 TAG1A, Perkins 4006-23 TAG2A, Perkins 4006-23 TAG3A
Before you start
- Do not drain the coolant while the engine is still hot and the system is under pressure.
- Discard the used coolant in a safe place and in accordance with local regulations.
- To prevent frost damage, ensure that all of the coolant is removed from the engine.
Procedure
- Put a suitable container below the drain plugs.
- Remove the filler cap (B1) from the coolant system.
- Open the tap or remove the drain plug at the bottom of the radiator to drain the radiator.
- Remove the drain plug (A1) from the side of the cylinder block to drain the engine; ensure the drain hole is not restricted.
- Open the drain tap on the oil cooler (C1).
- Flush the coolant system with clean water.
- Fit the drain plug (A1) and tighten to 68 Nm (50,5 lbf ft) 6.9 kgf m.
- Close the drain tap (C1).
- Fit the radiator cap and fit the radiator plug or close the radiator tap if fitted.
Specs & values
- Drain plug torque 68 Nm (50,5 lbf ft) 6.9 kgf m
Source: Perkins 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.