HOSE AS 3599710 - Caterpillar

Where possible mount the strainer so that the top is just above the waterline to facilitate cleaning.Keel Cooling or Skin Cooling
Keel cooling or skin cooling is a closed circuit method of cooling that uses only coolant with 50/50 antifreeze mix.A properly designed and installed cooling system is essential for satisfactory engine life and performance.Keel cooling is a cooling system that uses a group of tubes, pipes or channels attached to the outside of the hull below the waterline as a heat exchanger. Keel coolers are used in preference to the standard raw water cooled engine mounted heat exchanger when operating in areas that have heavy silt and debris in the water that would erode the heat exchanger tubes or block them.Keel cooling is used in Arctic conditions to avoid the problems of freezing that is experienced with the raw water circuit on the heat exchanger cooling system.Keel coolers are available in standard designs from several manufacturers. These units are simple to install and are sized by the manufacturer for the engine model and boat application. Commercial coolers are made of erosion resistant materials and have a relatively high heat transfer efficiency.The disadvantage of external keel coolers is that they are vulnerable to damage and therefor must be guarded. An alternative to the commercially available coolers are fabricated keel coolers manufactured by the boat builder as part of the hull construction. These coolers are not as efficient and must be designed oversize to allow for a decrease in performance that follows the formation of rust, scale and marine growth on the keel cooler.
If the genset is a replacement package and the original cooling system, keel cooler and expansion tank, is to be reused, then it is essential that the system thoroughly flushed to remove sludge that may be in the system. Failure to remove sludge could block air bleeds leading to the engine overheating.
Sizing the CoolersCommercial keel coolers are manufactured in a variety of sizes and shapes. The keel cooler manufacturer will recommend a keel cooler when provided with the following data:-* Engine model and rating* Engine data sheet* Heat Rejection (see table below)* Engine Coolant Flow* Max. coolant temperatures from grid cooler* Maximum raw water temperature* Pipe connections - Min. 44mm (1.75") o.d; Min. 38mm (1.5") bore* Coolant - 50/50 antifreeze mix Figure (A) shows the connections (A1) and flow (A2) for the 4 cylinder engines to the keel cooler (A3). The size of the connections (A1) are both 38mm (1 1/2" inches). Figure (B) shows the connections (B1) and flow (B2) for the 6 cylinder engines to the keel cooler (B3). The size of the connections (B1) are both 45mm(1 3/4" inches). Keel cooler should be installed below the waterline far enough to avoid the aerated water close to the surface. Recessed and shielded coolers must allow for unobstructed flow around the coolers. The keel coolers should be installed so that air pockets are not present during the initial fill. Vents at all high points along