These pictures were on our previous website & I thought I would explain how this Case 580L ended up looking like this.
Problem – Had a call from a customer who said he had a strange “whirring” noise coming from the engine of his Case 580LE. This machine is fitted with a Case/Cummins 4-390 naturally aspirated engine.
Diagnosis – Inspected the machine on-site & it did indeed have a “whirring” noise coming from the front of his engine. Upon closer inspection I found an irregular bulge at the timing cover. I removed the bolts at the timing cover & prised it open & shone a light into the timing gears to see that the camshaft gear was not in alignment with the other gears & had moved out of it’s position & was rubbing against the timing cover. A visit to the ALR laboratory was now arranged.
Repair – In short, the camshaft retaining bolts had fallen out – after about 6000hrs of operation – this allowed the camshaft to move & also damaged the cam followers. Miracuously, the missing bolts ended up in the oil pan – without doing any real damage to any timing gears, & also the valve timing did not change significantly enough to allow valve contact with pistons. The items replaced – camshaft; camshaft followers; engine front cover; timing cover & seal; oil pump; front engine mountings