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’.
When changing the pump lube fluid on a PMC horizontal pump line.
1. Spray test until the Resin Proportioning Pump is positioned on the left hand side. Set the Pump Switch to OFF.
2. Remove the Lube Reservoir from its support, unscrew the Lid and remove the Check valve of the suction hose.
3. Empty the contaminated lube oil in a proper waste container and refit the check valve in the suction hose.
4. Clean the reservoir, refill with lube oil, and screw on the lid and replace the reservoir in its support. Most spray foam and polyurea machines iso pump lubrication systems are auto-suction and do not require priming. Be sure to reference your operational manual for proper procedures and guide lines.