Home » ISX11.9 CM2250 - Service Manual » Cummins ISX11.9 CM2250 – Service Manual 008-018   Cooling System

Cummins ISX11.9 CM2250 – Service Manual 008-018   Cooling System

Table of Contents

Drain
Flush
Fill
Pressure Test

Drain

TOC

Position the equipment on level ground.

 
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 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 pressure cap after the engine is cool.

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 WARNING 

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

Do not allow the cooling system to dry out.

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 Supplemental Coolant Additive (SCA) concentration.

Use the following Procedure in the ISX11.9 CM2250 Operation and Maintenance Manual, Bulletin 2883444. Refer to Procedure 018-004 in Section V.

Open the radiator draincocks.

Remove the lower radiator hose(s).

Do not remove the coolant filter.

 
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Flush

TOC

 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.

 
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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.

 
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 CAUTION 

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

After draining the coolant, immediately add 3.8 liters [1 gal] of Fleetguard® Restore™, Restore Plus™, or 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.

 
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 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.

Operate the engine at normal operating temperatures, at least 85°C [185°F], for 1 to 1½ hours.

Shut the engine off and allow it to cool to 50°C [120°F].

Drain the cooling system.

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Fill the cooling system with clean water.

 
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 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 the engine off and drain the cooling system.

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

 
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 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 pets. If not reused, dispose of in accordance with local environmental regulations.

Operate the engine at high idle for 5 minutes with the coolant temperature above 85°C [185°F].

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

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

 
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 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.

Use the following Procedure in the ISX11.9 CM2250 Operation and Maintenance Manual, Bulletin 2883444. Refer to Procedure 018-004 in Section V.

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Fill

TOC

Close the radiator draincocks.

Install the lower radiator hose(s).

Tighten the hose clamps.

Torque Value:  5  n.m  [44 in-lb]

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 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.

Water Quality
Calcium Magnesium (Hardness)
Maximum 170 ppm as (CaCO3 + MgCO3)
Chloride
40 ppm as (CI)
Sulfate
100 ppm as (SO4)

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

 
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Fill the cooling system with heavy-duty coolant and install the correct service filter.

Use the following Procedure in the ISX11.9 CM2250 Operation and Maintenance Manual, Bulletin 2883444. Refer to Procedure 018-004 in Section V.

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

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

 
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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.

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Shut the engine off and allow it to cool.

 
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 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 for recommendations. Add coolant if necessary. Do not overfill.

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Pressure Test

TOC

Connect the air line in place of a vent line on the surge tank.

Install an air regulator (2) between the ball valve (1) of the air line and the surge tank connection.

Attach a hose to the radiator overflow connection (3).

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Place the free end of the hose below the water level in a container of water.

 
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 CAUTION 

Do not apply more than 140 kPa [20 psi] air pressure to the cooling system. The water pump seal can be damaged.

Pressurize the cooling system slowly to the rated radiator cap pressure until bubbles can be seen in the overflow bottle.

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Replace the cap if necessary.

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Last Modified:  03-Aug-2010