Big Dawg Liner System

Used when working on radiators found in Caterpillar™ type equipment. During radiator rebuilds, often tanks have had rust and debris removed from the area where the seal is inserted.  This repeated cleaning and rust removal could leave the seal bore enlarged and/or out of round.   Since the radiator tank is made from steel it often continues to rust and can prematurely cause the radiator seals to fail due to uneven or lack of interference between the radiator neck and the main tank bore caused by this issue.  Usually a clear sign that this problem exists is finding rust debris embedded into the seal where it comes into contact with the radiator main tank.


The two most common ways to repair a radiator tank in this condition is to replace it or install new liners into the radiator tank.  Replacing the tank is often expensive and there may be time spent waiting for the new tank, also, since the new radiator tank will still be made from steel it is again vulnerable to rusting over time.  

A more economical and permanent solution to replacing the tank is to rebuild it with the Big Dawg™ Liner System.  Inspired by ongoing problems in the mining industry with premature seal leakage,  Micon Industries developed this innovative solution in 2002.  This liner system can be performed by your cooling system professional and often with a quick turn around so that your machine is back working as fast as possible.




Using this approach to restoring the radiator seal bore is a fast and reliable remedy to an ongoing problem, providing a permanent solution.  The Brass/Bronze liner has been formulated to never rust or corrode, providing a like new surface for the seals to seat against and maintaining the integrity of that seal bore indefinitely.


The Big Dawg™ Liner System is easy to use, it comes complete with an instructional video allowing you to be rebuilding tanks in no time.  With a bit of practice average sized radiator tanks can often be restored with less than one hour of labor.


Once you have the tank bores lined with our inserts you have a permanent solution, contact us for an equipped shop near you.

Folded Core Radiators

If superior built performance is what you're looking for in your Caterpillar™ replacement radiators then you have found it with PROCORE™ Radiators. They have spent years studying field failures to come up with a completely upgraded radiator unit to meet all conditions.  Check out the design advantages that make the Procore™ radiators your best choice for service and reliability.


Material Thickness

Both the end tanks and header plates are 30% thicker than the originals, this increase in thickness provides extra protection from the constant vibration-pounding and abrasion found in so many applications.

Tube/Header Contact

With all of the weight and vibration of each individual core being directed to the tube/header area, the strength of the soldered joint between them is critical.  Through deep draw technology the contact area between the tube and header has been doubled. Coupled with a higher tin/lead solder used to assemble them provides the strongest construction available, delivering long leak free service from the radiator.

Center Mounts

Another upgraded feature is the center mount of the radiator. This component is used to resist core flexing and to cut down harmful vibration, it's a critical component to the radiators stability.  The center mount in the Procore radiator had been increased in thickness by over 20% to provide maximum support to the core while delivering more protection from vibration. 

With so much depending on cooling systems employed in industrial equipment, it's critical to engineer and develop components that pass the test of heat-abrasion and constant flexing and pounding.  Procore knows this well, that's why only the best materials and workmanship go into each and every Procore radiator.

Folded Core Radiator Part Numbers:

2W5536 S
2W5539 S
2W5540 S
9Y3318 S
9Y3317 S
2W6632 S
7W9541 S
7W2173 S
2W0181 S

AMOCS Radiators

Advanced Modular Cooling System

Many years ago Caterpillar™ began to move their cooling system design and construction toward more modular type systems, one of the advantages of these new designs allowed for easier in-field servicing of equipment.

AMOCS radiators utilize a unique design and can be found on a variety of equipment including "R" series models.  The key feature to this design is that it utilizes a two pass cooling system which effectively  increases cooling surface area to provide greater cooling capacity over conventional one pass systems, this design is very effective in applications where there is a limited frontal surface area available.

The radiator itself is basically made up of a number of sectioned radiator elements and a sectioned main bottom tank.  The two pass cooling system circulates coolant from the sectioned bottom tank, up through the front side of the radiator cooling elements, the coolant then flows down through the rear side of the sectioned cooling element returning to the bottom tank and then flows back via the water pump through the engine.  

Often times with new cooling system designs there will also be new servicing considerations.  Here we cover some of the considerations of the radiator unit only rather than the entire cooling system.  Certainly there exist the usual checks some of which include:

  • Good unobstructed external airflow through the radiator
  • Solid bond between the radiator fin and tube
  • Internal plugging
  • Leakage  

With this design also comes a unique consideration that we call "coolant bypass".  Because this design utilizes a sectioned main bottom tank and sectioned cooling elements both of which employ rubber gaskets to maintain the seal, these gaskets can fail for a number of reasons including but not limited to (oil/diesel fuel contamination in cooling system, rubber seal deterioration, baffles coming loose and more)  and need to be checked carefully for deterioration and coolant bypass.  If the coolant is bypassing the seal through the sectioned bottom tank, then the coolant will return back to the engine without having moved through the radiator elements first, the coolant then effectively "bypasses" the radiator elements that provide the cooling, which can lead to serious overheating issues.


Because the radiator elements also have a baffle and rubber seal built into them to maintain the two pass flow, the gaskets and baffles also need to be inspected and tested for bypass values.  

Sometimes when we receive these types of radiator elements we do not have the opportunity to test and inspect the sectioned main bottom tank, but in order to properly check for bypass problems that can lead to overheating conditions it is important to determine the "total bypass value"  this is a value given to the total volume of coolant bypassing the radiator elements due to a combination of bypassing through the radiator elements and the sectioned main bottom tank, once everything is tested we arrive at a bypass value expressed in "gallons per minute".  

As these systems age/fail the radiator elements begin to exceed allowable bypass values causing equipment to run hotter and hotter, left unchecked this could lead to expensive engine issues.  


We now have a very effective replacement product manufactured by Procore International Radiators available to address this issue, we have redesigned the radiator elements so that there is no baffle or gasket to fail, instead we us two separate tanks.  This design is a very practical way around this very persistent problem, the radiator construction has also been changed to allow much easier servicing and dis-assembly during routine overhaul intervals.  The radiator elements have been in use in Canada and the USA for years with extremely good reviews from many mines looking for permanent solutions to this very common problem.

A breakthrough, we have done away with conventional rubber sealed baffles, this completely soldered design eliminates the risk of equipment overheating due to bypassing, with all brass construction ALL of the coolant passes through the radiator core all of the time.



Factory assemblies of tank components are hand soldered with 40/60 solder allowing for full dis-assembly and serviceability unlike most other designs this unit is easily rodded out, reversible (some models) and headers can be rebuilt, providing you many years of service.



Heavy .090" reinforcement plates used on all headers top and bottom in conjunction with our exclusive deep drawn headers provides extra resistance to high vibration loads and stresses.


This innovative design coupled with tight component specifications and attention to hand assembly detail make this AMOCS radiator the best choice for your equipment, coolant bypassing is the number one cause of overheating due to failure of rubber gaskets used with the baffles, we have eliminated the rubber gaskets and use a conventional soldered tank/header design.



Every detail of this radiator was upgraded; all components meet or exceed OE standards, from our heavy wall welded seam tubing to full header reinforcement plates, no failures, no bypassing... no corners cut


AMOCS Part Numbers:



Micon Grommets

Micon Grommets™ are used worldwide wherever Mesabi™ type radiators are employed.  Rebuild times are generally reduced by 30 to 50% due to compound formulation and physical engineering.  Our exclusive time released lubrication system built right into the compound allows for easier installation and reduces "Bake on" problems associated with other compounds.



  • Highly Modified Nitrile
  • Built-in Lubrication System
  • Oil Resistant 

Temperature Range   

  • -35F to +218F 

Service Life 

  • 3 years (approximately)
  • 15,000 service hours 


  • For use in all water based
  • Mesabi™ type radiators.

*Not for use in oil coolers*

Quality Control   

  • Constant attention to material durometer, dimensional specification and processing quality are maintained.

More Articles ...

  1. Micon Seals


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