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Cooling Hoses

Posted by Eric Rego on

In some instances, it will be required to reduce the ID of a hose to make a transition. For these instances, special rubber reducers are available from Gates that slip inside a hose and act like a “bushing,” effectively reducing the ID. The table included at the bottom of this article shows what ID reducer options are available.

 

Another option is to use a transition hose to step up or down a hose size. This option can work well especially if additional length is needed to make connections. Popular Gates transition hoses are also listed in this article.

 

We've also included an image showing one possible way to construct a lower coolant hose when a 5.9L engine was installed in a White 2-135. In this example, a factory White 100 series lower coolant hose was used in conjunction with a transition hose and a stainless steel tube. Since the 5.9L engine is much shorter than the original Hercules engine, it was necessary to extend the lower coolant hose to reach the radiator. In addition, it was also required that the coolant hose ID be increased to fit onto the original radiator. It should be noted that when a stainless tube is used, hose beads must be rolled onto both ends of the tube to keep the hoses from working off the tube.

 

Cummins Lower Water Neck Part Number 3903103
Cummins Lower Water Neck Part Number 3934877
An Example of a Gates Transition Hose
AGCO Lower Hose Part Number 3777869M1 Shown on a 4BT Installed in a 1650.
White 2-135 Lower Coolant Hose Configuration Utilizing the 30-3448398 White 100 Series Lower Radiator Hose and Gates Transition Hose
White American 30-3457265 Lower Radiator Hose
  Description White Part Number Horizontal Offset Dimension A Dimension B
Upper Radiator Hoses (Radiator Inlet) White 100 Series 30-3443736 2” 11 1/2” 14 1/2”
White American Series 30-3457273 4.5” 11 1/2” 11 1/2”
White 6125/6145 72506777 .5” 11 1/2” 14 1/2”
           
Lower Radiator Hoses (Radiator Outlet) White 100 Series (Use 3934877 Water Neck) 30-3448398      
White American Series (Use 3934877 Water Neck) 30-3457265      
Agco White 6710/6810 (Ideal for 50 and 55 Series Conversions)(Use 3934877 Water Neck) 3777869M1    
Transition Hose Part Numbers
Gates Part Number Inside Diameter #1 Inside Diameter #2 Length
20369 2.25” 2.5” 3.4”
22177 2.25” 2.5” 6”
21492 2” 2.5” 4”
20532 2” 2.25” 3”
20520 1.75” 2” 5”
20351 1.5” 1.75” 3.5”
Hose ID Reducer
Gates Part Number Reducer OD Reducer ID
26390 1 1/2” 1 1/4”
26391 1 3/4” 1 1/2”
26392 2” 1 3/4”
26393 2 1/4” 2”
26394 2 1/2” 2 1/4”
26395 3” 2 1/2”

 


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