B5.9G, B5.9LPG, B Gas Plus, B LPG Plus, and B Gas International Engines – 008-018   Cooling System

Drain the cooling system by opening the drain valve on the radiator and removing the plug in the bottom of the coolant inlet.

A drain pan with a capacity of 20 liters [5 gal] will be adequate in most applications.

Check for damaged hoses and loose or damaged hose clamps. Replace as required. Check the radiator for leaks, damage, and buildup of dirt. Clean and repair as required.

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.

NOTE: The performance of RESTORE™ is dependant on time, temperature, and concentration levels. An extremely scaled or flow restricted system, for example, may require higher concentrations of cleaners, higher temperatures, or longer cleaning times, or the use of RESTORE PLUS™. RESTORE™ can safely be used up to twice the recommended concentration levels. RESTORE PLUS™ must be used only at its recommended concentration level. Extremely scaled or fouled systems may require more than one cleaning.

RESTORE™ CC2610 (1 gallon)

RESTORE™ CC2611 (5 gallon)

RESTORE™ CC2612 (55 gallon)

RESTORE PLUS™ CC2638 (1 gallon)

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

Drain the cooling system. Do not allow the cooling system to dry out. RESTORE™ will not be as effective if the cooling system is allowed to dry.

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

Immediately add 3.8 liters [1 U.S. gallon] of Fleetguard® RESTORE™, RESTORE PLUS™, or equivalent for each 38 to 57 liters [10 to 15 gallons] of cooling system capacity, and fill the system with plain water.

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

Operate the engine at normal operating temperatures (at least 85°C [185°F]) for 1 to 1-1/2 hours.

Shut off the engine and drain the cooling system.

Fill the cooling system with clean water to flush the cooling system.

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

Shut off the engine and drain the cooling system.

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

CAUTION  Never use water alone for coolant. Damage from corrosion can be the result of using water alone for coolant.

NOTE: A 50/50 mixture of antifreeze and water must be premixed before filling the system. The ability of antifreeze to remove heat from the engine is not as good as water, so pouring antifreeze into the engine first could contribute to an overheated condition before the liquids completely intermix.

Refer to Procedure 018-004 (Coolant Recommendations and Specifications) in Section V for correct concentration of coolant.

CAUTION  The system must be filled slowly to prevent air locks. During filling, air must be vented from the engine coolant passages. Wait 2 to 3 minutes to allow air to be vented, then add coolant to bring the level to the top.

Close all drain valves and fill the system. Use a mixture of 50-percent water and 50-percent antifreeze to provide freeze protection to -36°C [-33°F].

Low-silicate antifreeze must be mixed with quality water at a 50/50 ratio (40 to 60 percent working range). A 50/50 mixture of antifreeze and water gives a -37°C [-34°F] freeze point and a boiling point of 109°C [228°F].

The actual lowest freeze point of ethylene glycol antifreezes is at 68 percent. Using higher concentrations of antifreeze will raise the freeze point of the solution and increase the possibility of a silicate gel problem.

Refer to Procedure 018-004 (Coolant Recommendations and Specifications) in Section V.

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

The freeze point protection must be checked if the coolant is added to the cooling system. Refer to the manufacturer’s instructions for correct operation.

Do not use a floating ball hydrometer.

Use of a floating ball hydrometer can give incorrect readings.

Install the pressure cap.

Operate the engine until it reaches a temperature of 80°C [176°F], and check for coolant leaks.

Check the coolant level again to make sure the system is full of coolant.