• Bell machines are built to endure the most rigorous conditions without complaint. Then again, if you consider how we design them, it should come as no surprise!
  • We believe there is more to Bell Equipment Company than simply our machines. We have an international network of dealers and subsidiaries stocking PARTS you would expect available immediately!
  • We pride ourselves that all care is taken to ensure that the quality of replacement parts we stock, meets the same stringent quality standards as the parts we use in producing the machine.
Bell Parts

Parts Enquiries: 855-494-2355

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Frequently Asked Questions:


Q1: What is the micron rating of my machine's air filter?

A1: Typically, air cleaners and filters are not assigned a micron rating. Micron rating is a term in liquid filtration. Air filters are evaluated for efficiency using an industry wide standard SAE J1726 test. Efficiency is the percentage of contaminants that a filter removes from the air ( typically 99.9% ).

For all intents and purposes, particles greater than 4 to 5 microns, do not penetrate high performance heavy duty air filters as specified by Bell.


Q2: Can heavy duty air filter elements be cleaned or re-used?

A2: Bell Equipment, in agreement with heavy duty air filter manufacturers, do not recommend any type of cleaning process be used on their products. Further, they do not warrant their product once it has been cleaned.


Q3: Can I substitute an air filter based only on dimension?

A3: No, many characteristics of a filter need to be considered besides the overall dimension. One detail is whether or not the filter is going into a radial seal or axial seal air filter housing. A radial seal filter with a urethane end cap is not interchangeable with an axial seal filter with a gasket end cap.


Q4: Can you judge air filter element life by visual inspection?

A4: Visual inspection is not a recommended method. Measuring intake system restriction is the most reliable determination of filter life. Service by restriction allows the filter to remain in service until the maximum allowable restriction limit for the application is reached.


Q5: Why am I experiencing short air filter life?

A5: The amount of dirt an air filter can hold before servicing depends on many variables.

1) Environmental conditions ( serve dust, soot, moisture etc ) 

2) How much contaminant reaches the filter?

3) Is the size of the air cleaner and filter relevant to the air flow requirement.?

The larger the filter, the longer the filter life tends to be?




Q1: What is the micron rating and efficiency of the filter?

A1: The micron rating of a filter represents the size of the particle that the filter can remove from the fluid passing through it. The difference between filters is how efficient they are at removing certain sizes of particles.


Q2: What type of media does the filter use?

A2: Earlier filters used a depth type media which is still used in some filters today. Most lube filters now use pleated cellulose or cellulose blended media, while lube filters in specialized applications use synthetic media (glass) or glass blended media.


Q3: How do I know when an oil filter plugs?

A3: There is no direct indication since a bypass valve will open and supply unfiltered oil to the engine. To avoid this from happening, it is best to replace a filter according to the engine manufacturers change interval recommendations.


Q4: What is element collapse and how does it occur?

A4: Element collapse occurs when the pressure drop across the filter element becomes so great that the element is crushed. All engines have a bypass valve that should open and relieve pressure before the collapse occurs, but if the relief valve fails to open or does not relieve the pressure, the element may collapse. To avoid this happening, it is best to replace a filter according to the engine manufacturers change interval recommendations.




Q1: What causes short life in a filter?

A1: The two most common causes of bad fuel results from poor fuel handing practices and cold weather fuel waxing.


Q2: What effects can water in fuel have on the injection system?

A2: Compared with diesel, water has inferior lubrication properties, so its presence will cause scuffing and rapid wear. Water trapped between the rubbing surfaces causes corrosion, failure of springs, rust on other steel components and pits on the cams that actual the pumping plungers.


Q3: What is the capacity of a diesel fuel filter and how is it measured?

A3: Capacity is the laboratory test measure ( in grams ) of the ability of a filter to resist clogging under specific test conditions. Tests generally involve the addition of contaminant slurry into laboratory flow systems so that the time that the filter survives the test can be directly calculated into grams capacity. Capacity is dependant on the test endpoint ( final restriction ) fluid flow rate, filter area and the type of media tested.