A report was received at around 8.00 pm that the plant machinery was on fire on Thursday, February 20, 2014.
Police and fire crews attended the scene.
As a result of the fire substantial damage was caused to the cabs of the machinery.
The two machines are valued at approximately £90,000 – £100,000.
Enquiries are ongoing into the incident.
Police would ask anyone who noticed any suspicious activity in the area or who has any information to contact police in Newtownabbey on 0845 600 8000.
Information can also be given anonymously by calling Crimestoppers on 0800 555 111.