Cummins ISX11.9 CM2250 – Service Manual 012-004   Air Compressor Coolant Lines

Inspect the coolant hoses for splits, cracks, hardening, or other damage.

Inspect metal coolant lines for kinks, corrosion, or cracks.

Replace any damaged components.

WARNING  Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.

WARNING  Coolant is toxic. Keep away from children and animals. If not reused, dispose of in accordance with local environmental regulations.

NOTE: Draining the cooling system is not required on air-cooled air compressors.

• Drain the cooling system. Refer to Procedure 008-018 in Section 8.

Remove the coolant lines from the air compressor (does not apply to air-cooled compressors).

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Some solvents are flammable and toxic. Read the manufacturer’s instructions before using.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Clean the air compressor coolant lines with solvent.

Dry with compressed air.

Check the o-rings for cuts or other damage. Replace if damage is found.

Check the air compressor coolant lines for cracks or other damage. Replace if damage is found.

Check the face of the coolant fittings to be sure the o-ring is in place and is not damaged.

A damaged or missing o-ring will result in a coolant leak.

Replace the o-rings if damage is found.

Install the air compressor coolant lines.

Tighten the fitting on the cylinder block.

TIghten the fittings on the air compressor.

Tighten the banjo fitting at the rocker housing.

WARNING  Coolant is toxic. Keep away from children and animals. If not reused, dispose of in accordance with local environmental regulations.

• Fill the cooling system. Refer to Procedure 008-018 in Section 8.
• Operate the engine to normal operating temperature and check for leaks.