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SY108117 :  Forklift RADIATOR CAP SY108117 : Forklift RADIATOR CAP

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SY42523 :  Forklift RADIATOR CAP SY42523 : Forklift RADIATOR CAP

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SY44619 :  Forklift RADIATOR CAP SY44619 : Forklift RADIATOR CAP

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SY45000 :  Forklift RADIATOR CAP SY45000 : Forklift RADIATOR CAP

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SY47489 :  Forklift RADIATOR CAP SY47489 : Forklift RADIATOR CAP

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SY48035 :  Forklift RADIATOR CAP SY48035 : Forklift RADIATOR CAP

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SY51652 :  Forklift RADIATOR CAP SY51652 : Forklift RADIATOR CAP

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SY93129 :  Forklift RADIATOR CAP SY93129 : Forklift RADIATOR CAP

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SY94465 :  Forklift RADIATOR CAP SY94465 : Forklift RADIATOR CAP

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BC6682274 : Forklift RADIATOR CAP BC6682274 : Forklift RADIATOR CAP

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ET21069 : Forklift RADIATOR CAP ET21069 : Forklift RADIATOR CAP

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ET21070 : Forklift RADIATOR CAP ET21070 : Forklift RADIATOR CAP

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ET21071 : Forklift RADIATOR CAP ET21071 : Forklift RADIATOR CAP

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ET21073 : Forklift RADIATOR CAP ET21073 : Forklift RADIATOR CAP

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ET21930 : Forklift RADIATOR CAP ET21930 : Forklift RADIATOR CAP

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EY92510435 : Forklift RADIATOR CAP EY92510435 : Forklift RADIATOR CAP

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GD7027412 : Forklift RADIATOR CAP GD7027412 : Forklift RADIATOR CAP

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GD8162208 : Forklift RADIATOR CAP GD8162208 : Forklift RADIATOR CAP

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GD8180311 : Forklift RADIATOR CAP GD8180311 : Forklift RADIATOR CAP

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GZ92510435 : Forklift RADIATOR CAP GZ92510435 : Forklift RADIATOR CAP

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HK8782583 : Forklift RADIATOR CAP HK8782583 : Forklift RADIATOR CAP

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82-572 : Forklift RADIATOR CAP 82-572 : Forklift RADIATOR CAP

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TO-216 : Forklift RADIATOR CAP TO-216 : Forklift RADIATOR CAP

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129 : Forklift RADIATOR CAP 129 : Forklift RADIATOR CAP

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179 : Forklift RADIATOR CAP 179 : Forklift RADIATOR CAP

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2175 : Forklift RADIATOR CAP 2175 : Forklift RADIATOR CAP

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291-1268 : Forklift RADIATOR CAP 291-1268 : Forklift RADIATOR CAP

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291-1274 : Forklift RADIATOR CAP 291-1274 : Forklift RADIATOR CAP

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291-1277 : Forklift RADIATOR CAP 291-1277 : Forklift RADIATOR CAP

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291-1283 : Forklift RADIATOR CAP 291-1283 : Forklift RADIATOR CAP

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291-1294 : Forklift RADIATOR CAP 291-1294 : Forklift RADIATOR CAP

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TF92510435 : Forklift RADIATOR CAP TF92510435 : Forklift RADIATOR CAP

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XN92510435 : Forklift RADIATOR CAP XN92510435 : Forklift RADIATOR CAP

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RADIATOR CAP  CLARK CL926014 926014 : Forklift RADIATOR CAP for CROWN

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BKCPC89C0175010 : Forklift RADIATOR CAP for KOMATSU BKCPC89C0175010 : Forklift RADIATOR CAP for KOMATSU

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CAP  RADIATOR 13 LBS FOR HYSTER 1332395 1332395 : Forklift RADIATOR CAP

Hyster Forklift Parts

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CAP  RADIATOR 13 LBS FOR HYSTER 1367114 1367114 : Forklift RADIATOR CAP

Hyster Forklift Parts

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CAP  RADIATOR 13 LBS FOR HYSTER 2022396 2022396 : Forklift RADIATOR CAP

Hyster Forklift Parts

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CAP  RADIATOR 13 LBS FOR HYSTER 3055617 3055617 : Forklift RADIATOR CAP

Hyster Forklift Parts

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CAP  RADIATOR 13 LBS FOR HYSTER 3056611 3056611 : Forklift RADIATOR CAP

Hyster Forklift Parts

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CAP  RADIATOR 13 LBS FOR CLARK 7004423 7004423 : Forklift RADIATOR CAP

Clark Forklift Parts

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CAP - RADIATOR 13 LBS FOR TOYOTA 00591-22143-81 00591-22143-81 : Forklift RADIATOR CAP

Toyota Forklift Parts

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CAP - RADIATOR 13 LBS FOR TOYOTA 00591-30341-81 00591-30341-81 : Forklift RADIATOR CAP

Toyota Forklift Parts

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CAP - RADIATOR 13 LBS FOR TOYOTA 00591-42073-81 00591-42073-81 : Forklift RADIATOR CAP

Toyota Forklift Parts

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Forklift radiator cap

Reading time: 3 min 5 sec

Do you need more information to know what the correct radiator cap for your forklift is? Do not hesitate to contact our team. Our team understands the different forklifts and forklift radiator caps, like the back of their hand. Same-day shipping and quick delivery. Buy a new forklift radiator cap. Quality guaranteed at low prices.

Summary

The following technical information allows the reader to know more about the radiator cap and its functioning within the cooling system of an internal combustion engine. Besides, you will find the selection criteria to acquire the correct replacement for your radiator cap and some tips about the common problems presented in this device.

Table of content

  1. What is a radiator cap?

  2. Components of the radiator cap

  3. How a radiator cap works

  4. How to choose the correct forklift radiator cap

  5. How to check a radiator cap

  6. Common problems

What is a radiator cap?

It is a small part that belongs to a forklift cooling system. This device controls the high pressure that hot coolant generates in the radiator. A pressurized cooling system is essential to raise the coolant boiling point to keep the coolant as a liquid.


Figure 1. Forklift radiator cap

Components of the radiator cap


  1. Upper-pressure seal.

  2. Lower-pressure seal.

  3. Vacuum valve.

  4. Spring.


Figure 2. Radiator cap and its main parts

How a radiator cap works

The design of this device makes it capable of handling pressure changes. When the coolant stops circulating the engine body, it enters with a considerable heat amount into the radiator tank. It makes the coolant volume increase, and the pressure in the cooling system is higher.

The lower-pressure seal moves upwards and flows towards a reservoir tank once the coolant pressure exerts a force major than the radiator cap spring. The upper-pressure seal assures the hermeticity of the cap. It also avoids the escape of coolant from the system to the outside or air entering the system.

The vacuum valve opens to regulate the cooling system pressure once it has a value lower than the outside air pressure. It happens when the engine cools down.

How to choose the correct forklift radiator cap

  • Dimensions: The total height, the distance between hooks, LIP width, and valve diameter are helpful parameters when comparing a new cap with the one to be replaced.

  • Operating pressure: It is the most critical parameter. The new cap must have the same pressure as the one that is damaged. It ensures its good performance. A pressure range for a typical radiator cap is between 4 Psi - 30 Psi. Be careful when reading pressure measurement as some manufacturers express it in other units as Bar o kPa.

  • Radiator cap type: A cooling system can work with a recovery cap and a non-recovery cap. The design of the recovery cap has a single seal; meanwhile, a non-recovery cap has a double seal. Generally, Forklift cooling systems use a recovery cap.

How to check a radiator cap

A basic visual inspection could identify the problem:

  1. Check the engine is off and cool.

  2. Remove the radiator. As the first step, turn it clockwise to release the remaining pressure. Then, push it and turn it again until it is removed. While doing this, check if this device is fixed correctly to the radiator tank.

  3. Inspect the condition of the device's internal components.

  • Springs: If there is no chance to exert pressure on the springs inside this device during the visual inspection, it means that the cap is damaged and needs a replacement.

  • Seals: If seals are melted, broken, or deformed is recommended to replace the cap.


For a deeper inspection, special equipment is necessary to evaluate the performance of the cap.

Common problems

The seals are pieces made of rubber. A bad condition of these components makes the radiator cap not work appropriately. Given the construction material of the seals, extended use and high temperature could degrade their original shape. On the other hand, the spring is made of metallic material. It can get stuck due to external agents, rust, and damage due to the time of use.



Figure 3. A damaged radiator cap

The common problems that come from a defective radiator cap are:

  • The coolant passes to the reservoir tank when it is not required.

  • The radiator cap gets stuck in the radiator, and thus, the pressure will still increase inside the radiator without control.

  • Another related problem is when the upper seal is defective because it causes air entry into the cooling system. The presence of this air in the system has its components corrosion as a consequence.

  • A radiator hose collapses by excessive internal suction. It happens when the vacuum valve of the radiator cap is defective.

Takeaways

  • The radiator cap controls the high pressure that hot coolant generates in the radiator.

  • When choosing a forklift radiator cap, the dimensions, the cap type, and the operating pressure are essential parameters.

  • A basic inspection is helpful to know if the radiator cap is working correctly and its internal components are in good condition.

  • Coolant leakage, cap stocked, defective seals, and bad condition of the vacuum valve are the common problems of a radiator cap.

We have a great variety of radiator caps at the lowest price. Lift parts warehouse works hard to save you some money keeping the quality of the spare part. We take the work out of finding the parts you need for your forklift or forklift truck, and we make the process a lot easier overall, so try us out. Our wide industry contacts allow us to give you the best price for the selected product.

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