Forestry Equipment J1939 Failures: How the Right Harness Saves Eight Thousand Dollars a Year in Field Repairs
Last February I stood knee-deep in snow next to a tracked feller-buncher in northern Quebec. The operator had limped the machine to the edge of the cut block after it derated for the fourth time that week. The engine ECU was throwing SPN 639 FMI 9 — Abnormal Update Rate on the J1939 datalink — and the local dealer had already […]