Inspecting the iso pump lubricant reservoir on your spray foam or Polyurea machine is often overlooked and should be part of a daily routine. Pump Lube forms a barrier between the ISO and the atmosphere. The lubricant will require changes pending the environment it is operating within. Typically every 3 to 4 weeks a gel formation occurs.
This is due to moisture absorption by the pump lubricant. Another entity that occurs is that different types spray foam and coating machines pumps have some form of seepage when using isocyanate during operations by-passing the pump packing’s. This in return can eventually cause a thin film build up on the pump shaft creating damage to the packing’s.
Early signs that the iso pump lubrication will need changing is its color darkens or contamination with the iso component turning into a milky white in color opposed to clear in liquid color. When checking the fluid another area of concern to pay attention to is the check valve attached in line of the pump lube suction hose. This can become clogged with geld material and can result in a plug the system preventing recirculation of the fluid.
Taking a preventive maintenance step in conjunction with utilizing the re-tract / park feature on your spray foam machine will help extend the life of your pump and pump packing’s’.