Serviced !

A few years ago i was working for a piling contractor who was having issues with a hydraulic grab overheating. An individual came from another branch in Hong Kong to come and set up the machine to company specifications, but whatever was done to the machine it would not stop overheating and wrongly diagnosed it as hydraulic loading of the pumps driven by the engine. The pumps were de-rated and the outcome was that it would hardly operate before overheating again. (The machine overheated within 10 metres of operation, raising from normal coolant temp of 85 degrees C up to 99-100 degrees C within 10 metres). Top and bottom hoses were hot indicating thermostats open giving the same temp on both hoses but without coolant movement over the radiator core as viewed from the radiator cap. I got to thinking about this as the engine i knew was a very powerful unit and should of chewed this job to pieces, and i thought i'd better just go back to basics and check the cooling system even though it had just come out of the workshop and specifically the "Engine builder" had just serviced it....... Low and behold what did i find ?? There was no pump circulation across the mouth of the radiator, hinting at a pump problem, and the coolant itself came out in lumps as in the pictures....... The moral of the story is, don't believe all you're told about servicing, and don't grasp at technical possibilities before looking at the basics first........