Service Bulletin

Customer Service Bulletin

Commercial Business Group

All Liquid Cooled Commercial Products Date: March 31, 2005

Model/Serial Range: Model Number: Serial Numbers:

000000-99999 (All) 00000 – 250999999 (All)

Subject: Cleaning Radiators of Debris –Maintenance Recommendations

The normal operating environment of all turf industry equipment could be categorized as

“off road, severe duty”. In order for equipment to provide continuous service in this type

of environment, routine cleaning and scheduled maintenance needs to be performed.

Cleaning the equipment cooling systems (radiators and screens) will assure optimum

performance and engine life from all liquid cooled machines, and should be done on a

daily basis. In dirty, dusty conditions, you may need to clean the radiator/screen more

than once throughout the day to ensure the cooling system is operating at peak

performance.

The Toro Groundsmaster 4000 Series mowers (4000-D, 4100-D, 4500-D, 4700-D)

incorporates significant improvements in operator comfort and performance over other

machines by drawing the air for the cooling system from the rear of the mower. Noise is

greatly reduced for operators. This advantage requires attentive radiator cleaning by the

operators. The air flow in the 4000 Series comes through the rear of the machine,

through the screen, through the oil cooler, through the radiator and out the bottom of the

unit. All of these areas need to be kept clean for the system to function properly.

The following is a quick checklist that will help you keep these vital components clean on

all liquid cooled machines.

Cooling System Cleaning Checklist:

• Engage the parking brake, stop the engine and remove the key from the switch.

• Brush off the air intake screen thoroughly to eliminate chaff and debris.

• Open the hood or swing out the screen by unlatching the clips on each side.

• Remove the retaining nuts that hold the oil cooler. Tilt the oil cooler back to

access the radiator.

• Using an OSHA-compliant extended air nozzle that can reach into the radiator,

blow the debris out from the fan side of the radiator first. Do a thorough job

making sure to clean the corners, bottom half and center of the radiator. These

are the spots that are most often missed or overlooked.

NOTE: Do not use water to clean Radiators! Water can mix with debris in the radiator

fins and result in dense, packed mud which can block airflow. If water has been used to

clean the radiator, there may be a build-up of hardened, packed debris which may

require additional effort to remove before these procedures will be effective.

PAGE 1
Customer Service Bulletin Commercial Business Group All Liquid Cooled Commercial Products Model/Serial Range: Model Number: 000000-99999 (All) Date: March 31, 2005 Serial Numbers: 00000 – 250999999 (All) Subject: Cleaning Radiators of Debris –Maintenance Recommendations The normal operating environment of all turf industry equipment could be categorized as “off road, severe duty”.
PAGE 2
• Once the debris has been cleaned out from the fan side of the radiator, blow out debris from the cooler side of the radiator towards the fan. Use your air nozzle to remove the rest of the debris from the oil cooler side of the radiator. Again, make sure to clean the corners, bottom and the center section. After the radiator and oil cooler have been cleaned, reinstall the oil cooler and fasten it with the retaining nuts.