ISM, ISMe, and QSM11 – 008-018   Cooling System

Restore™ is a heavy-duty cooling system cleaner that removes corrosion, silica gel, and other deposits. The performance of Restore™ is dependent on time, temperature, and concentration levels. An extremely scaled or flow-restricted system, for example, can require higher concentrations of cleaners, higher temperatures, or longer cleaning times, or the use of Restore Plus™. Up to twice the recommended concentration levels of Restore™ can be used safely. Restore Plus™ must be used only at its recommended concentration level. Extremely scaled or fouled systems can require more than one cleaning.

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.

Remove the pressure cap.

Drain the cooling system. Do not allow the cooling system to dry out.

Do not remove the coolant filter.

Position the vehicle on level ground.

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.

Remove the radiator cap after the engine is cool.

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

Do not allow the cooling system to dry out.

Drain the cooling system as follows:

• Open the radiator draincock.
• Remove the lower radiator hose.
• Do not remove the coolant filter.

NOTE: If the coolant is to be reused, the container must be free of oil and dirt. Before pouring coolant back into the engine, it must be tested for SCA concentration. Refer to Procedure 018-004 in Section V in the appropriate Operation and Maintenance manual.

CAUTION  Do not use caustic cleaners in the cooling system. Aluminum components will be damaged.

The cooling system must be clean to work correctly and to eliminate buildup of harmful chemicals.

CAUTION  Fleetguard® Restore™ contains no antifreeze. Do not allow the cooling system to freeze during the cleaning operation.

Immediately add 3.8 liters [1 gal] of Fleetguard® Restore™, Restore™ Plus, or the equivalent, for each 38 to 57 liters [10 to 15 gal] of cooling system capacity, and fill the system with plain water.

Turn the cab heater temperature switch to high to allow maximum coolant flow through the heater core. The blower does not have to be on.

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.

Operate the engine at normal operating temperatures, at least 85°C [185°F], for 1 to 1-½ hours.

Shut off the engine, allow to cool to 50° C [120°F], and drain the cooling system.

Fill the cooling system with clean water.

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

Operate the engine at high idle for five minutes with the coolant temperature above 85°C [185°F].

Shut off the engine and drain the cooling system.

If the water being drained is still dirty, the system must be continually flushed until the water is clean.

CAUTION  To reduce the possibility of engine damage, do not add coolant while the engine is hot.

Fill the cooling system with fully formulated coolant or a 50/50 mixture of fully formulated antifreeze and good quality water. Use a service filter to bring the coolant to the correct SCA concentration level.Refer to Procedure 018-004 in Section V of the appropriate Operation and Maintenance manual.

Install the pressure cap. Operate the engine until it reaches a temperature of 80°C [180°F], and check for coolant leaks.

The freeze point protection must be checked after coolant is added to the cooling system.

The Fleetguard™ refractometer, Part Number C2800, provides a reliable, easy-to-read, and accurate measurement of freeze point protection and antifreeze concentration.

Refer to the OEM service manual instructions for the correct operation instructions for the Fleetguard® refractometer, Part Number C2800.

Close the radiator draincocks.

Install the lower radiator hose(s).

Tighten the hose clamps.

CAUTION  Do not add coolant to a hot engine. Engine castings can be damaged. Allow the engine to cool below 50°C [120°F] before adding coolant.

Cummins Inc. recommends using either a 50/50 mixture of good-quality water and fully-formulated antifreeze, or fully-formulated coolant when filling the cooling system. The fully-formulated antifreeze or coolant must meet TMC RP329 or TMC RP330 specifications.

Good-quality water is important for cooling system performance. Excessive levels of calcium and magnesium contribute to scaling problems, and excessive levels of chlorides and sulfates cause cooling system corrosion.

Cummins Inc. recommends using Fleetguard® COMPLEAT ES. It is available in glycol forms (ethylene and propylene) and complies with TMC RP329 and RP330 standards.

Fill the cooling system with heavy-duty coolant and install the correct service filter. Refer to Procedure 018-004 in Section V in the appropriate Operation and Maintenance manual.

Fill the cooling system with coolant to the bottom of the fill neck in the radiator fill (or expansion) tank.

NOTE: Some radiators have two fill locations, both of which must be filled when the cooling system is drained.

Install the radiator or expansion tank fill cap.

Operate the engine until it reaches a temperature of 82°C [180°F], and check for leaks.

Shut off the engine and allow to cool.

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.

CAUTION  Do not add cold coolant to a hot engine. This can cause engine casting damage. Allow the engine to cool to below 50°C [120°F] before adding coolant.

Remove the radiator or fill cap and check the coolant level. Refer to the OEM service manual instructions for recommendations. Add coolant if necessary. Do not overfill.

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.

Check the coolant level and fill, if necessary.

CAUTION  Do not apply more than 138 kPa [20 psi] air pressure to the cooling system. The water pump seal can be damaged.

If the radiator is equipped with a pressure relief valve, plug the overflow line (1).

Install the pressure tester on the radiator fill neck or surge tank, if equipped, and apply air pressure.

Inspect the following for coolant leaks and repair, if necessary.

• Lubricating oil cooler. Refer to Procedure 007-003 in Section 7.
• Water pump. Refer to Procedure 008-062 in Section 8.
• Air compressor head gasket. Refer to Procedure 012-014.

Remove the pressure-test equipment, and connect the relief valve and surge tank, if equipped.