The Bobcat 843 has two inspection panels in the lower air shroud that allow access to the air intake side of the hydraulic oil cooler and radiator.
If this area becomes plugged with dust or debris the hydraulic oil and engine coolant cannot be cooled effectively causing overheating of the engine and hydraulics.
Periodically removing these inspection panels and cleaning may improve the performance
and possibly eliminate damage. Click here to view or print this page.
A good explanation is available on this Youtube video: https://youtu.be/S3SL9rJOZcg