SEAL-O-RING 5W4878 - Caterpillar

inspection is needed in order to ensure that the holes for the condensate drainage are not plugged with debris. Regular inspection is also needed in order to ensure that adequate flow is seen from the case. When the air conditioning system is in operation, there should be evidence of condensate that is exiting the machine from the drain lines.
Check the drain lines in order to ensure that the drain lines are not pinched.
Inspect the drain valves in order to ensure that the drain valves are present and installed correctly. The valve should be located between 0.0 mm (0.0 inch) and 76 mm (3 inch) from the end of the drain line.
If the lines are plugged with dirt and debris, flush the lines with water and relocate the valve.In order to make sure that the drainage system is working, open the HVAC case and inspect the interior sloped floor or the drain pan.
Ensure that no large debris is clogging the drain valves from the case.
If any large debris is observed, the HVAC case should be cleaned in order to prevent any future buildup from clogging the path of drainage.
Once the area for drainage has been cleaned, reassemble the HVAC case in order to make sure that the system works. Run the system and check the drain lines for condensate flow.