Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
SIL 3105
Altec has learned that the affected units may have incorrect fittings installed at the lower control station manifold block. Incorrect fittings can allow air into the hydraulic system. The presence of air in the hydraulic system will cause abnormal operation, noise, and damage to the pump.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.