HOSE AS 3904577 - Caterpillar

Turn off the engine.Open both engine access doors (1).Inspect the cooling system for the following conditions: coolant leaks, oil leaks, damaged fins and tubes. Inspect the following parts of the cooling systems: air lines, connections and clamps for damage. Make repairs for damage, if necessary.Note: If parts of the aftercooler system appear to be damaged or if parts of the aftercooler system are repaired, a leak test is highly recommended. Refer to Special Instruction, SEHS8622, "Using the FT1984 Air-to-Air Aftercooler Leak Test Group". The FT-1984 Aftercooler Testing Group can be used for aftercoolers that have hoses with an inside diameter of 102 mm (4.00 inches) or 114 mm (4.50 inches).For more detailed information on testing and inspection, see Special Publication, SEBD0518, "Know Your Cooling System".Clean
Personal injury can result from air pressure.Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing.Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.
Radiator cores, aftercooler cores, hydraulic oil cooler cores, and a/c condenser cores needed to be cleaned regularly. Adjust the frequency of cleaning according to the effects of the operating environment.Cooler Cores
All machine arrangements have a remote mounted a/c condenser core, and a single plane of the following cores: hydraulic oil cooler core, radiator core and aftercooler core. Additionally, these arrangements may have a hydraulic fan that reverses the direction of air flow in order to purge debris.Clean
Personal injury can result from air pressure.Personal injury can result without following proper procedure. When using pressurized air, wear a protective face shield and protective clothing.Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.
Pressurized air: To avoid possible engine damage, shut off engine before performing maintenance to clean the cooling system. Install air nozzle into access slot before starting air supply. Read and understand Operation and Maintenance Manual.
In applications with high levels of airborne debris, a regular schedule for cleaning the cooling cores must be established. The frequency of cleaning and the method of cleaning must be tailored to the specific debris accumulation on the job site. In order to maintain clean cores, the cleaning will need to be done at least daily. Cleaning may be needed on a more frequent basis. The clean out schedule must be followed even when ambient temperatures are low. This schedule will prevent debris accumulation in the cores and future plugging.Access to the cores is through the engine access doors from the rear of the cores which results in blowing air in the same direction as the normal air flow through the fan. All machine arrangements offer two options for blowing air in the opposite direction of normal fan air flow. First, the reverse fan function has a continuous reverse mode. This mode allows prolonged periods of the reverse flow while the machine is parked. Next, slots are provided in both sides of the radiator guard for use with a 307-6728