If you want to learn about forklift radiator hoses, you have come to the right place. At Lift Parts Warehouse, we want to tell you how vital forklift coolant hoses are for the performance of your lift trucks. We also want to show you some tips to help you identify when your forklift's lower or upper hose needs to be replaced. Besides, we want to share the best selection criteria to acquire the correct forklift radiator hoses when you purchase them online. With all these tools, the next time you buy a new set of forklift coolant hoses will be easier and quicker!
What Role Do Forklift Radiator Hoses Play in a Cooling System?
The forklift radiator hoses, also known as forklift coolant hoses, are flexible rubber tubes that carry the coolant from the engine to the radiator, which is cooled before being circulated back to the engine. So they are a vital part of the forklift cooling system. Thanks to their rubber-material constitution, they have excellent resistance to handling high pressures and temperatures.
Commonly forklifts powered by internal combustion engines use upper and lower radiator hoses, each of them with their specific functionality. They work as follows:
Upper radiator hose: Its function is to receive the hot coolant from the engine body through a thermostat valve. The other extreme of this hose is connected to the upper radiator tank, where the fluid is delivered. This radiator hose it's also called "inlet radiator hose" or "inlet coolant hose."
Lower radiator hose: This hose connects the tank located at the bottom of the radiator with the water pump of the forklift cooling system. Through this hose, the coolant (with a low temperature) is pumped towards the engine body. This radiator hose it's also called "outlet radiator hose" or "outlet coolant hose."
When buying new forklift radiator hoses, make sure you choose the right one. These forklift coolant hose types are not interchangeable. Upper and lower radiator hoses are different in size and length.
How Long Do Forklift Radiator Hoses Last?
One way to know if forklift coolant hoses are good is by how long they have been working without significant problems. A good quality set of radiator hoses should work for at least four years without any major issues. But remember, if any of the other cooling system parts fail, the lifespan of your upper and lower radiator hoses will be greatly reduced.
How to Choose the Correct My Forklift Radiator Hoses Replacement
What radiator hose do you need to replace?: The first thing we must ensure. The reason is that the upper and lower radiator hoses are not the same. Both hoses differ in their shape and dimensions. Commonly, the lower radiator hose has a wound wire spring to avoid collapsing.
Dimensions: The size of a forklift's radiator can vary depending on the model of the forklift. This means that the coolant hoses, in terms of diameter and length, can vary a lot between different models of lift trucks.
Type: According to its synthetic rubber composition, both upper and lower radiator hoses will have some properties and temperature resistance. The following table shows the main one.
Cooling system hoses type and relative parameters
Typical Temp. range (°C)
-55 to 175
-40 to 100
-40 to 100
-40 to 125
-40 to 125
-40 to 150
-40 to 125
How to Check the Condition of a Forklift Radiator Hose
Identify where the radiator hoses are. Generally, they are bigger than the other hose types and have a specific shape.
Touch the hoses and squeeze them to check the condition. They must have a certain flexibility and springiness—a forklift coolant hose that feels soft, weak, or brittle should be replaced immediately.
Check the condition of its respective clamps. If they are rusty, the clamps should be replaced with new ones. This action assures the seal on the hose connection and its stability.
The Easy Way to Replace the Forklift Coolant Hoses by Yourself
Park the forklift on a level surface and turn off the engine. Allow the forklift to cool completely before beginning any work.
Locate the radiator hoses. There are usually two of them, the upper and lower radiator hoses. The lower one runs from the radiator to the water pump, and the upper one returns running from the water pump back to the radiator.
Using a wrench, loosen the clamps that secure the radiator hoses to the fittings on the forklift. Be careful not to damage the hose or the fitting when loosening the clamp.
Once the clamps are loose, remove the old radiator hoses from the forklift. If necessary, use a wire brush to clean any debris from the fittings before installing the new hoses.
Place the new radiator hoses onto the forklift, making sure that they are properly seated on the fittings.
Use the wrench to tighten the clamps and secure the hoses in place.
Start the engine and check for any leaks. If there are any leaks, tighten the clamps until they stop.
Allow the engine to run for a few minutes to check that the temperature gauge is working properly and that there are no further leaks before driving the forklift.
What are the Main Reasons for a Forklift Radiator Hose to Collapse?
Heat. A radiator hose handles the high temperatures of the coolant that little by little degrades its material. So, the hose's inside walls lose thickness and tend to expand, creating pinhole cracks where coolant can leak.
The low clamp torque. It is another reason why a radiator hose presents leakages. This issue is pretty regular after installing a new radiator hose while the forklift engine remains hot. It happens because the heat stimulates the expansion of the metal connections. The hose also expands, much more than the metal. The tightening of the clamp will be done for an expanded metal diameter. However, when the engine cools off, the metallic connections and hoses will return to a smaller diameter. This contraction forms a tiny space between the hose and the connector, causing the coolant to leak.
Electrochemical degradation. Electrical reactions occur between the coolant and metals of the cooling system. It creates an electrical charge in the fluid that degrades the inner side of the hoses. So, the hose becomes soft, or cracks appear inside.
Ozone concentration. The pollution increases the ozone quantity inside radiator hoses. It causes an internal crack, mostly in curves, inlet/outlet connections, and bends.
Find the Perfect Forklift Radiator Hoses Online at Lift Parts Warehouse
A forklift radiator hose in bad condition must be replaced. At Lift Parts Warehouse, you can browse our extensive inventory of radiator hoses compatible with the most popular brands like Hyster, Toyota, or Komatsu. We offer everything in a variation of size, part number, model, and much more. Save your money! with Lift Parts Warehouse; you can buy new forklift coolant hoses at low prices. All our products come with a high-quality warranty. Also, we put at your disposal high efficient delivery services with the change of international shipping.
We know that sometimes it could be challenging to find a specific forklift radiator hose for your forklift, but our competent team can help you. We make the selection process easier to find a good quality radiator hose at a reasonable cost. So, do not hesitate to contact us. All stocked items that are ordered before 2:00 pm ET will be shipped on the same day.
The forklift coolant hoses are rubber tubes that permit the coolant to pass between the engine body and the radiator.
The upper and lower radiator hoses are not the same, so they are not interchangeable. The upper radiator hose receives the hot coolant from the engine; the lower-radiator hose delivers the coolant with a suitable temperature to circulate again in the engine body.
When choosing a radiator hose, you need to be sure to know what the defective hose is. Other important criteria are its type and dimensions.
Checking the condition of the hoses permits to know if the hoses are in good condition or need a replacement.
The heat, low clamp torque, electrochemical degradation, and ozone concentration are the common problems that present the radiator hoses.